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Duport-Bru AS, Abdala V. Prey capture kinematics of horned frogs (Anura: Ceratophryidae). J Morphol 2024; 285:e21689. [PMID: 38549281 DOI: 10.1002/jmor.21689] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2023] [Revised: 02/24/2024] [Accepted: 03/14/2024] [Indexed: 04/02/2024]
Abstract
Horned frogs, members of the Ceratophryidae family, encompass a group of anurans varying in size and behavior, yet unified by morphological and behavioral traits enabling them to adopt a megalophagous diet (i.e., large prey feeding). Although the group has been the focus of numerous studies, our understanding of its feeding behavior remains limited. In this study, we characterize the feeding mechanism in five species representing the three extant genera of ceratophryid anurans, both in terrestrial and aquatic environments. We also explore the ability of Chacophrys pierottii to adjust feeding behavior based on prey type. Our findings show that all species are capable of wide mouth opening, displaying an asymmetric feeding cycle. While tongue usage is the primary method for capturing prey on land, ceratophryids may use their forelimbs to manipulate prey into their mouths, exhibiting different behavioral patterns. C. pierottii shows modulation of its feeding kinematics and is also capable of some modulation of its feeding in response to prey properties.
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Affiliation(s)
- Ana Sofía Duport-Bru
- Instituto de Biodiversidad Neotropical, CONICET-UNT, Yerba Buena, Tucumán, Argentina
- Facultad de Ciencias Naturales e IML, Universidad Nacional de Tucumán, San Miguel de Tucumán, Tucumán, Argentina
| | - Virginia Abdala
- Instituto de Biodiversidad Neotropical, CONICET-UNT, Yerba Buena, Tucumán, Argentina
- Facultad de Ciencias Naturales e IML, Universidad Nacional de Tucumán, San Miguel de Tucumán, Tucumán, Argentina
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2
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Albecker MA, Strobel SM, Womack MC. Developmental Plasticity in Anurans: Meta-analysis Reveals Effects of Larval Environments on Size at Metamorphosis And Timing of Metamorphosis. Integr Comp Biol 2023; 63:714-729. [PMID: 37279893 DOI: 10.1093/icb/icad059] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2023] [Revised: 05/11/2023] [Accepted: 05/30/2023] [Indexed: 06/08/2023] Open
Abstract
Many anuran amphibians (frogs and toads) rely on aquatic habitats during their larval stage. The quality of this environment can significantly impact lifetime fitness and population dynamics. Over 450 studies have been published on environmental impacts on anuran developmental plasticity, yet we lack a synthesis of these effects across different environments. We conducted a meta-analysis and used a comparative approach to understand whether developmental plasticity in response to different larval environments produces predictable changes in metamorphic phenotypes. We analyzed data from 124 studies spanning 80 anuran species and six larval environments and showed that intraspecific variation in mass at metamorphosis and the duration of the larval period is partly explained by the type of environment experienced during the larval period. Changes in larval environments tended to reduce mass at metamorphosis relative to control conditions, with the degree of change depending on the identity and severity of environmental change. Higher temperatures and lower water levels shortened the duration of the larval period, whereas less food and higher densities increased the duration of the larval period. Phylogenetic relationships among species were not associated with interspecific variation in mass at metamorphosis plasticity or duration of the larval period plasticity. Our results provide a foundation for future studies on developmental plasticity, especially in response to global changes. This study provides motivation for additional work that links developmental plasticity with fitness consequences within and across life stages, as well as how the outcomes described here are altered in compounding environments.
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Affiliation(s)
- Molly A Albecker
- Department of Biology and Biochemistry, University of Houston, 3455 Cullen Blvd, Houston Texas, 77004, USA
- Department of Biology, Utah State University, Logan Utah, 84322, USA
| | | | - Molly C Womack
- Department of Biology, Utah State University, Logan Utah, 84322, USA
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3
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Colaço G, da Silva HR. Finding a pathway through the rocks: the role of development on the evolution of quasi-terrestriality and the origin of endotrophism in cycloramphids (Anura). Biol J Linn Soc Lond 2022. [DOI: 10.1093/biolinnean/blac059] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
Abstract
Abstract
Anurans have served as models in evolutionary studies on reproduction and development. Several generalizations have emerged but it is unclear whether they represent the diversity of the entire group. We studied the development of two species of the Neotropical family Cycloramphidae. Frogs in this family have peculiar spawning sites and developmental biologies. Whereas some cycloramphid tadpoles are exotrophic, quasi-terrestrial and thrive in films of water that flow over rocky outcrops, others are endotrophic, terrestrial and complete their development outside the eggs laid on the forest floor, under logs or in crevices. Cycloramphid tadpoles have aspects of their morphology distinct from those of pond and stream dwellers; they hatch in more advanced stages of development and have typical tadpole structures, either in a modified form or absent. Herein we present a study of the tadpoles of C. lithomimeticus and T. miliaris, in order to document and discuss alterations in the ontogeny of several larval structures. These changes seem to be associated with adaptations to life in the peculiar habitats where the tadpoles thrive. We infer that the observations we present are explained by development being associated with aspects of terrestrialization and endotrophism.
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Affiliation(s)
- Gustavo Colaço
- Departamento de Biologia Animal, Instituto de Ciências Biológicas e da Saúde, Universidade Federal Rural do Rio de Janeiro , Seropédica, RJ , Brazil
| | - Helio Ricardo da Silva
- Departamento de Biologia Animal, Instituto de Ciências Biológicas e da Saúde, Universidade Federal Rural do Rio de Janeiro , Seropédica, RJ , Brazil
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Untangling the morphological contradiction: First ontogenetic description of the post-hatching skeleton of the direct-developing frog Brachycephalus garbeanus Miranda-Ribeiro, 1920 (Amphibia: Anura: Brachycephalidae) with comments on the genus miniaturization. ZOOL ANZ 2022. [DOI: 10.1016/j.jcz.2022.02.005] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
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5
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Native anurans threatened by the alien tree Ligustrum lucidum in a seasonal subtropical forest. Biol Invasions 2021. [DOI: 10.1007/s10530-021-02617-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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6
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Vassilieva AB, Smirnov SV. Increasing Hormonal Control of Skeletal Development: An Evolutionary Trend in Amphibians. Front Ecol Evol 2021. [DOI: 10.3389/fevo.2021.733947] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
The biphasic life history of amphibians includes metamorphosis, a complex developmental event that involves drastic changes in the morphology, physiology and biochemistry accompanying the transition from the larval to adult stage of development. Thyroid hormones (THs) are widely known to orchestrate this remodeling and, in particular, to mediate the development of the bony skeleton, which is a model system in evolutionary morphological studies of amphibians. Detailed experimental studies of the role of THs in the craniogenesis of diverse urodelan amphibians revealed that (i) these hormones affect both the timing and sequence of bone formation, (ii) TH involvement increases in parallel with the increase in divergence between larval and adult skull morphology, and (iii) among urodelans, TH-involvement in skull development changes from a minimum in basal salamanders (Hynobiidae) to the most pronounced in derived ones (Salamandridae and Plethodontidae). Given the increasing regulatory function of THs in urodelan evolution, we hypothesized a stronger involvement of THs in the control of skeletogenesis in anurans with their most complex and dramatic metamorphosis among all amphibians. Our experimental study of skeletal development in the hypo- and hyperthyroid yellow-bellied toad (Bombina variegata: Bombinatoridae) supports the greater involvement of THs in the mediation of all stages of anuran cranial and postcranial bones formation. Similar to urodelans, B. variegata displays enhancing TH involvement in the development of cranial bones that arise during larval ontogeny: while the hormonal impact on early larval ossifications is minimal, the skull bones forming during metamorphosis are strictly TH-inducible. However, in contrast to urodelans, all cranial bones, including the earliest to form, are TH-dependent in B. variegata; moreover, the development of all elements of the axial and limb skeleton is affected by THs. The more accentuated hormonal control of skeletogenesis in B. variegata demonstrates the advanced regulatory and inductive function of THs in the orchestration of anuran metamorphosis. Based on these findings, we discuss (i) changes in THs function in amphibian evolution and (ii) the role of THs in the evolution of life histories in amphibians.
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Fabrezi M, Cruz JC. Phenotypic Variation Through Ontogeny: Thyroid Axis Disruption During Larval Development in the Frog Pleurodema borellii. Front Ecol Evol 2021. [DOI: 10.3389/fevo.2021.715988] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Studies of the effects of thyroid hormones on larval development in the frog Xenopus spp. have provided baseline information to identify developmental constraints and elucidate genetic and hormonal mechanisms driving development, growth, and life history transitions. However, this knowledge requires data based on other anurans to complete a comprehensive approach to the understanding of larval developmental diversity and phenotypic variation through ontogeny. Mesocosm experiments provide realistic data about environmental conditions and timing; this information is useful to describe anuran larval development and/or analyze endocrine disruption. In this study, mesocosm experiments of the larval development of the frog Pleurodema borellii were conducted to explore the consequences of thyroid axis disruption; the sensitivity of tadpoles to the methimazole (2.66 mg/l) and thyroxine (T4) (1.66 μg/l) was compared. These concentrations were selected based on previous studies in Pleurodema borellii. We test the effects of methimazole and thyroxine on development in early exposure (from beginning of larval development) and late exposure, 18 days after hatching, with doses administered every 48 h. Tadpoles were evaluated 31 days after hatching. Methimazole caused moderate hypertrophy of the thyroid gland, alteration in the growth rates, differentiation without inhibition of development, and an increase of developmental variability. Thyroxine produced slight atrophy of the thyroid gland, accelerated growth rates and differentiation, and minor developmental variability. In tadpoles at stages previous to metamorphose, skull development (differentiation of olfactory capsules, appearance of dermal bones, and cartilage remodeling) seemed to be unaltered by the disruptors. Moreover, similar abnormal morphogenesis converged in specimens under methimazole and thyroxine exposures. Abnormalities occurred in pelvic and pectoral girdles, and vent tube, and could have been originated at the time of differentiation of musculoskeletal tissues of girdles. Our results indicate that premetamorphic stages (Gosner Stages 25–35) are sensitive to minimal thyroid axis disruption, which produces changes in developmental rates; these stages would also be critical for appendicular musculoskeletal morphogenesis to achieve the optimal condition to start metamorphosis.
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Rose CS. Amphibian Hormones, Calcium Physiology, Bone Weight, and Lung Use Call for a More Inclusive Approach to Understanding Ossification Sequence Evolution. Front Ecol Evol 2021. [DOI: 10.3389/fevo.2021.620971] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
Skeleton plays a huge role in understanding how vertebrate animals have diversified in phylogeny, ecology and behavior. Recent evo-devo research has used ossification sequences to compare skeletal development among major groups, to identify conserved and labile aspects of a sequence within a group, to derive ancestral and modal sequences, and to look for modularity based on embryonic origin and type of bone. However, questions remain about how to detect and order bone appearances, the adaptive significance of ossification sequences and their relationship to adult function, and the utility of categorizing bones by embryonic origin and type. Also, the singular focus on bone appearances and the omission of other tissues and behavioral, ecological and life history events limit the relevance of such analyses. Amphibians accentuate these concerns because of their highly specialized biphasic life histories and the exceptionally late timing, and high variability of their ossification sequences. Amphibians demonstrate a need for a whole-animal, whole-ontogeny approach that integrates the entire ossification process with physiology, behavior and ecology. I discuss evidence and hypotheses for how hormone mediation and calcium physiology might elicit non-adaptive variability in ossification sequence, and for adaptive strategies to partition larval habitats using bone to offset the buoyancy created by lung use. I also argue that understanding plasticity in ossification requires shifting focus away from embryonic development and adult function, and toward postembryonic mechanisms of regulating skeletal growth, especially ones that respond directly to midlife environments and behaviors.
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Fabrezi M, Cruz JC. Evolutionary and developmental considerations of the diet and gut morphology in ceratophryid tadpoles (Anura). BMC DEVELOPMENTAL BIOLOGY 2020; 20:16. [PMID: 32723314 PMCID: PMC7388516 DOI: 10.1186/s12861-020-00221-5] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/26/2020] [Accepted: 06/29/2020] [Indexed: 11/15/2022]
Abstract
BACKGROUND Before metamorphosis, almost all anuran tadpoles are omnivores. Larval carnivory occurs in some species and, it is associated with distinctive morphotypes. Obligatory carnivorous tadpoles exhibit structural changes in the gastrointestinal tract compared to larvae that are predominately omnivores. The most distinctive feature of the anuran family Ceratophyridae (three genera) overall is the enormous gape of adults. This feature increases their ability to capture extremely large and active prey. The larvae of Ceratophyrid genera are remarkably distinct from each other and carnivory has diversified in a manner unseen in other anurans. The larvae of one genus, Lepidobatrachus, has a massive gape like the adult. Herein, we report on larval developmental variation, diet, gross morphology of the gastrointestinal tract, and histology of the cranial segment of the gut before, during and after metamorphosis in larval series for the following ceratophryid species: Chacophrys pierottii, Ceratophrys cranwelli, Lepidobatrachus laevis and Lepidobatrachus llanensis. RESULTS We described patterns of larval development with variation in growth with consequence to the final size at the end of metamorphosis. These patterns seem to be influenced by food quantity/quality, and most predominant by animal protein. Prey items found in pre and post-metamorphic Lepidobatrachus spp. are similar. Tadpoles of Ceratophrys and Chacophrys (and other anurans) share a short cranial segment of the gut with an internal glandular, mucous secreting epithelium, a double coiled intestine and the sequence of metamorphic changes (tract is empty, the stomach differentiates and the intestine shortens abruptly). In contrast, Lepidobatrachus tadpoles have a true stomach that acquires thickness and increased glandular complexity through development. As larvae they have a short intestine without double coils, and the absence of intestine shortening during metamorphosis. CONCLUSIONS The larval development of the gastrointestinal tract of Lepidobatrachus is unique compared with that of other free-living anuran larvae. An abrupt metamorphic transformation is missing and most of the adult structural features start to differentiate gradually at the beginning of larval stages.
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Affiliation(s)
- Marissa Fabrezi
- Instituto de Bio y Geociencias del NOA, CCT CONICET Salta-Jujuy, Rosario de Lerma, Salta, República Argentina.
| | - Julio César Cruz
- Instituto de Bio y Geociencias del NOA, CCT CONICET Salta-Jujuy, Rosario de Lerma, Salta, República Argentina
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10
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Cruz JC, Fabrezi M. Histology and microscopic anatomy of the thyroid gland during the larval development of
Pseudis platensis
(Anura, Hylidae). J Morphol 2019; 281:122-134. [DOI: 10.1002/jmor.21085] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2019] [Revised: 10/28/2019] [Accepted: 11/08/2019] [Indexed: 01/17/2023]
Affiliation(s)
- Julio César Cruz
- Instituto de Bio y Geociencias del NOACCT CONICET Salta‐Jujuy Salta Argentina
| | - Marissa Fabrezi
- Instituto de Bio y Geociencias del NOACCT CONICET Salta‐Jujuy Salta Argentina
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11
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Grosso J, Baldo D, Costa CS, Natale GS, Candioti FV. Embryonic ontogeny of three species of Horned Frogs, with a review of early development in Ceratophryidae. J Morphol 2019; 281:17-32. [PMID: 31705582 DOI: 10.1002/jmor.21076] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2019] [Revised: 09/17/2019] [Accepted: 10/11/2019] [Indexed: 01/06/2023]
Abstract
Horned Frogs of the family Ceratophryidae are conspicuous anurans represented by three endemic South American genera. Most ceratophryids inhabit semiarid environments, but three species of Ceratophrys occupy tropical or temperate humid areas. Several morphological and behavioral characters of larvae and adults are conserved across the family. Based on examination of specimens and accounts in the literature, the embryonic development of C. ornata, C. cranwelli, and the monotypic genus Chacophrys are described and compared with that of species of Lepidobatrachus. Ceratophryid embryos share a suite of morphological features and heterochronic shifts during development. Most features, such as gill structure, ciliation, early hatching, and precocious differentiation of the gut and hind limbs, are shared by all the species regardless the differences in the habitats that occupy. This is consistent with previous observations of some adult characters, and likely supports the hypothesis of an early diversification of ceratophryids in semiarid environments. Other embryonic features, such as the morphology and ontogeny of the oral disc and digestive tract, are correlated with larval feeding habits and vary within the family. The evolutionary and ecological significance of some conserved characters (e.g., gastrulation pattern, Type-A adhesive glands) and other taxon-specific features (e.g., nasal appendix) remain to be explored in the group.
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Affiliation(s)
- Jimena Grosso
- Unidad Ejecutora Lillo (CONICET-FML), San Miguel de Tucumán, Tucumán, Argentina
| | - Diego Baldo
- Instituto de Biología Subtropical (IBS, CONICET-UNaM), Laboratorio de Genética Evolutiva, Facultad de Ciencias Exactas, Universidad Nacional de Misiones, Posadas, Misiones, Argentina
| | - Carolina Salgado Costa
- Centro de Investigaciones del Medioambiente (CIM, UNLP-CONICET), Departamento de Química, Facultad de Ciencias Exactas, Universidad Nacional La Plata, La Plata, Buenos Aires, Argentina
| | - Guillermo S Natale
- Centro de Investigaciones del Medioambiente (CIM, UNLP-CONICET), Departamento de Química, Facultad de Ciencias Exactas, Universidad Nacional La Plata, La Plata, Buenos Aires, Argentina
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12
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Fabrezi M, Lozano VL, Cruz JC. Differences in responsiveness and sensitivity to exogenous disruptors of the thyroid gland in three anuran species. JOURNAL OF EXPERIMENTAL ZOOLOGY PART B-MOLECULAR AND DEVELOPMENTAL EVOLUTION 2019; 332:279-293. [PMID: 31613429 DOI: 10.1002/jez.b.22908] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/03/2019] [Revised: 08/28/2019] [Accepted: 09/14/2019] [Indexed: 01/31/2023]
Abstract
Anuran larval development comprises tissues/organs/systems that are: exclusively of larvae, able to be remodelled, and those of postmetamorphic stages. Also, the anuran larval development is characterized by inter-related parameters: time, size and shape forming part of growth and differentiation. The anuran metamorphosis starts when growth and differentiation achieve a threshold that differs among species since it is regulated by a number of external (environmental) and internal (hormonal) processes. Here we explore the consequences of exogenous disruptors on the thyroid gland (e.g., methimazole and thyroxine as T4) of three species by immersing premetamorphic tadpoles in predetermined concentrations of the disruptors for short periods (10 or 16 days). The species were Pleurodema borellii, Leptodactylus chaquensis, and Dermatonotus muelleri, which all breed in small temporary ponds during the summer, but differ in their ecomorphology. The experiments were conducted to evaluate the effects of these substances on larval development (based in Gosner larval stages), morphometric variation in body parameters (snout-vent and total length by larval stages), and thyroid gland histopathology at the end of the assays. In P. borelli and L. chaquensis, methimazole produces significant increment of size measurements (nonparametric Kruskal-Wallis, p < .05) during stages of digit differentiation and induced thyroid gland hypertrophy. In the three species, T4 exposure accelerated limb development and caused atrophy of thyroid gland. Prolonged T4 exposure in L. chaquensis and D. muelleri triggered metamorphic transformation in the gut and skull cartilages. Discussion about interspecific differences in responsiveness and sensitivity elucidates the importance of hormonal signals to morphological evolution.
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Affiliation(s)
- Marissa Fabrezi
- Instituto de Bio y Geociencias del NOA, CCT CONICET Salta-Jujuy, Salta, República Argentina
| | - Verónica Laura Lozano
- Instituto de Bio y Geociencias del NOA, CCT CONICET Salta-Jujuy, Salta, República Argentina.,Depto. Ecología, Genética y Evolución, Facultad de Ciencias Exactas y Naturales and Instituto de Ecología, Genética y Evolución de Buenos Aires (IEGEBA) CONICET - Universidad de Buenos Aires, Buenos Aires, Argentina
| | - Julio César Cruz
- Instituto de Bio y Geociencias del NOA, CCT CONICET Salta-Jujuy, Salta, República Argentina
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Chuliver M, Fabrezi M. A Developmental Staging Table for Physalaemus biligonigerus (Cope, 1861) (Anura: Leptodactylidae). SOUTH AMERICAN JOURNAL OF HERPETOLOGY 2019. [DOI: 10.2994/sajh-d-18-00005.1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Affiliation(s)
- Mariana Chuliver
- Instituto de Bio y Geociencias del NOA, Consejo Nacional de Investigaciones Científicas y Técnicas, Rosario de Lerma, Salta, Argentina
| | - Marissa Fabrezi
- Instituto de Bio y Geociencias del NOA, Consejo Nacional de Investigaciones Científicas y Técnicas, Rosario de Lerma, Salta, Argentina
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Goldberg J, Quinzio SI, Cruz JC, Fabrezi M. Intraspecific developmental variation in the life cycle of the Andean Treefrog (Boana riojana): A temporal analysis. J Morphol 2019; 280:480-493. [DOI: 10.1002/jmor.20958] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2018] [Revised: 01/14/2019] [Accepted: 01/20/2019] [Indexed: 12/20/2022]
Affiliation(s)
- Javier Goldberg
- Instituto de Bio y Geociencias del NOA (IBIGEO-CONICET); Salta Argentina
| | | | - Julio César Cruz
- Instituto de Bio y Geociencias del NOA (IBIGEO-CONICET); Salta Argentina
| | - Marissa Fabrezi
- Instituto de Bio y Geociencias del NOA (IBIGEO-CONICET); Salta Argentina
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15
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Marangoni F, Stănescu F, Courtis A, Piñeiro JM, Ingaramo MDR, Cajade R, Cogălniceanu D. Coping with Aridity: Life History ofChacophrys pierottii,a Fossorial Anuran of Gran Chaco. SOUTH AMERICAN JOURNAL OF HERPETOLOGY 2018. [DOI: 10.2994/sajh-d-17-00070.1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Affiliation(s)
- Federico Marangoni
- Laboratorio de Herpetología, Departamento de Biología, Facultad de Ciencias Exactas y Naturales y Agrimensura, Universidad Nacional del Nordeste. Avenida Libertad 5400, cp. 3400, Corrientes, Argentina
| | - Florina Stănescu
- Faculty of Natural and Agricultural Sciences, Ovidius University Constanţa, Al. Universităţii 1, campus B, Constanţa 900470, Romania
| | - Azul Courtis
- Laboratorio de Herpetología, Departamento de Biología, Facultad de Ciencias Exactas y Naturales y Agrimensura, Universidad Nacional del Nordeste. Avenida Libertad 5400, cp. 3400, Corrientes, Argentina
| | - José Miguel Piñeiro
- Laboratorio de Herpetología, Departamento de Biología, Facultad de Ciencias Exactas y Naturales y Agrimensura, Universidad Nacional del Nordeste. Avenida Libertad 5400, cp. 3400, Corrientes, Argentina
- Fundación Amado Bonpland, San Juan 1182, cp. 3400, Corrientes, Argentina
| | - María del Rosario Ingaramo
- Laboratorio de Herpetología, Departamento de Biología, Facultad de Ciencias Exactas y Naturales y Agrimensura, Universidad Nacional del Nordeste. Avenida Libertad 5400, cp. 3400, Corrientes, Argentina
| | - Rodrigo Cajade
- Laboratorio de Herpetología, Departamento de Biología, Facultad de Ciencias Exactas y Naturales y Agrimensura, Universidad Nacional del Nordeste. Avenida Libertad 5400, cp. 3400, Corrientes, Argentina
- Fundación Amado Bonpland, San Juan 1182, cp. 3400, Corrientes, Argentina
| | - Dan Cogălniceanu
- Faculty of Natural and Agricultural Sciences, Ovidius University Constanţa, Al. Universităţii 1, campus B, Constanţa 900470, Romania
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Quinzio SI, Fabrezi M. The peripheral nerves of Lepidobatrachus
tadpoles (Anura, Ceratophryidae). J Morphol 2018; 280:4-19. [DOI: 10.1002/jmor.20849] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2018] [Revised: 05/10/2018] [Accepted: 05/26/2018] [Indexed: 11/06/2022]
Affiliation(s)
- Silvia I. Quinzio
- Instituto de Bio y Geociencias del NOA (IBIGEO); Centro Científico Tecnológico CONICET-Salta; Salta Argentina
| | - Marissa Fabrezi
- Instituto de Bio y Geociencias del NOA (IBIGEO); Centro Científico Tecnológico CONICET-Salta; Salta Argentina
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17
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Lescano JN, Miloch D, Leynaud GC. Functional traits reveal environmental constraints on amphibian community assembly in a subtropical dry forest. AUSTRAL ECOL 2018. [DOI: 10.1111/aec.12607] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Affiliation(s)
- Julián N. Lescano
- Facultad de Ciencias Exactas; Físicas y Naturales; Centro de Zoología Aplicada; Universidad Nacional de Córdoba; Rondeau 798 Córdoba Argentina
- Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET); Instituto de Diversidad y Ecología Animal (IDEA); Córdoba Argentina
| | - Daniela Miloch
- Facultad de Ciencias Exactas; Físicas y Naturales; Centro de Zoología Aplicada; Universidad Nacional de Córdoba; Rondeau 798 Córdoba Argentina
| | - Gerardo C. Leynaud
- Facultad de Ciencias Exactas; Físicas y Naturales; Centro de Zoología Aplicada; Universidad Nacional de Córdoba; Rondeau 798 Córdoba Argentina
- Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET); Instituto de Diversidad y Ecología Animal (IDEA); Córdoba Argentina
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Quinzio SI, Reiss JO. The ontogeny of the olfactory system in ceratophryid frogs (Anura, Ceratophryidae). J Morphol 2017; 279:37-49. [DOI: 10.1002/jmor.20751] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2017] [Revised: 07/20/2017] [Accepted: 08/10/2017] [Indexed: 11/08/2022]
Affiliation(s)
- Silvia I. Quinzio
- Instituto de Bio y GeoCiencias del NOA (IBIGEO), Centro Científico Tecnológico CONICET ̶ Salta. 9 de Julio 14. 4405. Rosario de Lerma; Salta Argentina
| | - John O. Reiss
- Department of Biological Sciences; Humboldt State University; Arcata California
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Székely D, Denoël M, Székely P, Cogălniceanu D. Pond drying cues and their effects on growth and metamorphosis in a fast developing amphibian. J Zool (1987) 2017. [DOI: 10.1111/jzo.12468] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- D. Székely
- Faculty of Natural and Agricultural Sciences; Ovidius University Constanța; Constanța Romania
- Laboratory of Fish and Amphibian Ethology; Behavioural Biology Unit; Freshwater and Oceanic Science Unit of Research (FOCUS); University of Liège; Liège Belgium
- Departamento de Ciencias Biológicas; Universidad Técnica Particular de Loja; Loja Ecuador
| | - M. Denoël
- Laboratory of Fish and Amphibian Ethology; Behavioural Biology Unit; Freshwater and Oceanic Science Unit of Research (FOCUS); University of Liège; Liège Belgium
| | - P. Székely
- Departamento de Ciencias Biológicas; Universidad Técnica Particular de Loja; Loja Ecuador
- Asociación Chelonia; Bucureşti Romania
| | - D. Cogălniceanu
- Faculty of Natural and Agricultural Sciences; Ovidius University Constanța; Constanța Romania
- Asociación Chelonia; Bucureşti Romania
- CITIAB; Ciudadela Universitaria La Argelia; Universidad Nacional de Loja; Loja Ecuador
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Gómez RO, Regueira E, O’Donohoe MA, Hermida GN. Delayed osteogenesis and calcification in a large true toad with a comparative survey of the timing of skeletal ossification in anurans. ZOOL ANZ 2017. [DOI: 10.1016/j.jcz.2017.03.002] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Marcellini S, González F, Sarrazin AF, Pabón-Mora N, Benítez M, Piñeyro-Nelson A, Rezende GL, Maldonado E, Schneider PN, Grizante MB, Da Fonseca RN, Vergara-Silva F, Suaza-Gaviria V, Zumajo-Cardona C, Zattara EE, Casasa S, Suárez-Baron H, Brown FD. Evolutionary Developmental Biology (Evo-Devo) Research in Latin America. JOURNAL OF EXPERIMENTAL ZOOLOGY PART B-MOLECULAR AND DEVELOPMENTAL EVOLUTION 2016; 328:5-40. [PMID: 27491339 DOI: 10.1002/jez.b.22687] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/24/2016] [Revised: 06/16/2016] [Accepted: 06/20/2016] [Indexed: 12/29/2022]
Abstract
Famous for its blind cavefish and Darwin's finches, Latin America is home to some of the richest biodiversity hotspots of our planet. The Latin American fauna and flora inspired and captivated naturalists from the nineteenth and twentieth centuries, including such notable pioneers such as Fritz Müller, Florentino Ameghino, and Léon Croizat who made a significant contribution to the study of embryology and evolutionary thinking. But, what are the historical and present contributions of the Latin American scientific community to Evo-Devo? Here, we provide the first comprehensive overview of the Evo-Devo laboratories based in Latin America and describe current lines of research based on endemic species, focusing on body plans and patterning, systematics, physiology, computational modeling approaches, ecology, and domestication. Literature searches reveal that Evo-Devo in Latin America is still in its early days; while showing encouraging indicators of productivity, it has not stabilized yet, because it relies on few and sparsely distributed laboratories. Coping with the rapid changes in national scientific policies and contributing to solve social and health issues specific to each region are among the main challenges faced by Latin American researchers. The 2015 inaugural meeting of the Pan-American Society for Evolutionary Developmental Biology played a pivotal role in bringing together Latin American researchers eager to initiate and consolidate regional and worldwide collaborative networks. Such networks will undoubtedly advance research on the extremely high genetic and phenotypic biodiversity of Latin America, bound to be an almost infinite source of amazement and fascinating findings for the Evo-Devo community.
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Affiliation(s)
- Sylvain Marcellini
- Laboratorio de Desarrollo y Evolución, Departamento de Biología Celular, Facultad de Ciencias Biológicas, Universidad de Concepción, Concepción, Chile
| | - Favio González
- Facultad de Ciencias, Instituto de Ciencias Naturales, Universidad Nacional de Colombia, Bogotá, Colombia
| | - Andres F Sarrazin
- Instituto de Química, Pontificia Universidad Católica de Valparaíso, Valparaíso, Chile
| | | | - Mariana Benítez
- Laboratorio Nacional de Ciencias de la Sostenibilidad, Instituto de Ecología, Universidad Nacional Autónoma de México, Ciudad de México, México
| | - Alma Piñeyro-Nelson
- Departamento de Producción Agrícola y Animal, Universidad Autónoma Metropolitana, Xochimilco, Ciudad de México, México
| | - Gustavo L Rezende
- Universidade Estadual do Norte Fluminense, CBB, LQFPP, Campos dos Goytacazes, RJ, Brazil
| | - Ernesto Maldonado
- EvoDevo Lab, Unidad de Sistemas Arrecifales, Instituto de Ciencias del Mar y Limnología, Universidad Nacional Autónoma de México, Puerto Morelos, Quintana Roo, México
| | | | | | - Rodrigo Nunes Da Fonseca
- Núcleo em Ecologia e Desenvolvimento SócioAmbiental de Macaé (NUPEM), Campus Macaé, Universidade Federal do Rio de Janeiro, Macae, RJ, Brazil
| | | | | | | | | | - Sofia Casasa
- Department of Biology, Indiana University, Bloomington, IN, USA
| | | | - Federico D Brown
- Departamento de Zoologia, Instituto de Biociências, Universidade de São Paulo, São Paulo, SP, Brazil
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Soliz M, Ponssa ML. Development and morphological variation of the axial and appendicular skeleton in hylidae (Lissamphibia, Anura). J Morphol 2016; 277:786-813. [DOI: 10.1002/jmor.20536] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2015] [Revised: 02/19/2016] [Accepted: 02/27/2016] [Indexed: 11/05/2022]
Affiliation(s)
- Mónica Soliz
- Facultad de Ciencias Naturales, Universidad Nacional de Salta, Cátedra Vertebrados; Avenida Bolivia 5150 Salta Capital Argentina
| | - María Laura Ponssa
- Unidad Ejecutora Lillo (UEL). CONICET-Fundación Miguel Lillo; Miguel Lillo 251. S.M. de Tucumán (4000) Tucumán Argentina
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Fabrezi M, Quinzio SI, Goldberg J, Cruz JC, Pereyra MC, Wassersug RJ. Developmental changes and novelties in ceratophryid frogs. EvoDevo 2016; 7:5. [PMID: 26925212 PMCID: PMC4769514 DOI: 10.1186/s13227-016-0043-9] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2016] [Accepted: 02/11/2016] [Indexed: 12/19/2022] Open
Abstract
The Neotropical frog genera Ceratophrys, Chacophrys and Lepidobatrachus form the monophyletic family Ceratophryidae. Although in- and out-group relationships are not fully resolved, the monophyly of the three genera is well supported by both morphological and molecular data. Much is known about the morphology of the ceratophryids, but there is little comparative information on how modification of a common ancestral developmental pathway played a role in shaping their particular body plans. Herein, we review morphological variation during ceratophryid ontogeny in order to explore the role of development in their evolution. The ceratophryids are collectively characterized by rapid larval development with respect to other anurans, yet the three genera differ in their postmetamorphic growth rates to sexual maturity. Derived traits in the group can be divided into many homoplastic features that evolved in parallel with those of anurans with fossorial/burrowing behaviors in semiarid environments, and apomorphies. Morphological novelties have evolved in their feeding mechanism, which makes them capable of feeding on exceptional large prey. Lepidobatrachus is unusual in having reduced the ecomorphological differences between its larvae and adults. As a result, both the larvae and the frog are similarly able to capture large prey underwater. Some unique features in Lepidobatrachus are differentiated in the tadpole and then exaggerated in the adult (e.g., the posterior displaced jaw articulation) in a manner unobserved in any other anurans.
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Affiliation(s)
- Marissa Fabrezi
- />Instituto de Bio y Geociencias (IBIGEO), Centro Científico Tecnológico CONICET-Salta, 9 de Julio 14, 4405 Rosario de Lerma, Salta Republic of Argentina
| | - Silvia Inés Quinzio
- />Instituto de Bio y Geociencias (IBIGEO), Centro Científico Tecnológico CONICET-Salta, 9 de Julio 14, 4405 Rosario de Lerma, Salta Republic of Argentina
| | - Javier Goldberg
- />Instituto de Bio y Geociencias (IBIGEO), Centro Científico Tecnológico CONICET-Salta, 9 de Julio 14, 4405 Rosario de Lerma, Salta Republic of Argentina
| | - Julio César Cruz
- />Instituto de Bio y Geociencias (IBIGEO), Centro Científico Tecnológico CONICET-Salta, 9 de Julio 14, 4405 Rosario de Lerma, Salta Republic of Argentina
| | - Mariana Chuliver Pereyra
- />Instituto de Bio y Geociencias (IBIGEO), Centro Científico Tecnológico CONICET-Salta, 9 de Julio 14, 4405 Rosario de Lerma, Salta Republic of Argentina
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Schalk C, Fitzgerald L. Ontogenetic shifts in ambush-site selection of a sit-and-wait predator, the Chacoan Horned Frog ( Ceratophrys cranwelli). CAN J ZOOL 2015. [DOI: 10.1139/cjz-2014-0320] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Ontogenetic shifts in habitat use are widespread among vertebrates. These niche shifts are often attributed to age-specific patterns of resource use, which are correlated with changes in morphology, diet, and habitat. We examined the ontogeny of ambush-site selection in a sit-and-wait predator, the Chacoan Horned Frog (Ceratophrys cranwelli Barrio, 1980), in the Gran Chaco ecoregion of Bolivia. We quantified covariation in microhabitat and morphological variables and tested for microhabitat selection against randomly selected points. We identified an ontogenetic shift in ambush-site selection between adult and metamorph frogs. When compared with random points, metamorphs selected a subset of available habitat, whereas adult frogs did not appear to select ambush sites. Metamorphs, compared with adults, selected ambush sites farther from a pond’s edge with a greater proportion of dry mud. The metamorph of C. cranwelli may have selected ambush sites based on spatial distribution of certain size classes of prey. Alternatively, metamorphs could have selected sites to minimize asymmetric agonistic intraspecific interactions with adults. These mechanisms are not mutually exclusive and probably occur in concert. Habitat selection and ontogenetic niche shifts by these organisms provide insights to the trade-offs between foraging strategy and mortality risk.
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Affiliation(s)
- C.M. Schalk
- Biodiversity Research and Teaching Collections, Department of Wildlife and Fisheries Sciences, and Ecology and Evolutionary Biology Program, 210 Nagle Hall, Texas A&M University, College Station, TX 77843-2258, USA
- Biodiversity Research and Teaching Collections, Department of Wildlife and Fisheries Sciences, and Ecology and Evolutionary Biology Program, 210 Nagle Hall, Texas A&M University, College Station, TX 77843-2258, USA
| | - L.A. Fitzgerald
- Biodiversity Research and Teaching Collections, Department of Wildlife and Fisheries Sciences, and Ecology and Evolutionary Biology Program, 210 Nagle Hall, Texas A&M University, College Station, TX 77843-2258, USA
- Biodiversity Research and Teaching Collections, Department of Wildlife and Fisheries Sciences, and Ecology and Evolutionary Biology Program, 210 Nagle Hall, Texas A&M University, College Station, TX 77843-2258, USA
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Amphibian assemblages in dry forests: Multi-scale variables explain variations in species richness. ACTA OECOLOGICA-INTERNATIONAL JOURNAL OF ECOLOGY 2015. [DOI: 10.1016/j.actao.2015.05.002] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Faivovich J, Nicoli L, Blotto BL, Pereyra MO, Baldo D, Barrionuevo JS, Fabrezi M, Wild ER, Haddad CF. Big, Bad, and Beautiful: Phylogenetic Relationships of the Horned Frogs (Anura: Ceratophryidae). SOUTH AMERICAN JOURNAL OF HERPETOLOGY 2014. [DOI: 10.2994/sajh-d-14-00032.1] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Affiliation(s)
- Julián Faivovich
- División Herpetología, Museo Argentino de Ciencias Naturales “Bernardino Rivadavia”—Consejo Nacional de Investigaciones Científicas y Técnicas, Ángel Gallardo 470, C1405DJR, Buenos Aires, Argentina
| | - Laura Nicoli
- División Herpetología, Museo Argentino de Ciencias Naturales “Bernardino Rivadavia”—Consejo Nacional de Investigaciones Científicas y Técnicas, Ángel Gallardo 470, C1405DJR, Buenos Aires, Argentina
| | - Boris L. Blotto
- División Herpetología, Museo Argentino de Ciencias Naturales “Bernardino Rivadavia”—Consejo Nacional de Investigaciones Científicas y Técnicas, Ángel Gallardo 470, C1405DJR, Buenos Aires, Argentina
| | - Martín O. Pereyra
- División Herpetología, Museo Argentino de Ciencias Naturales “Bernardino Rivadavia”—Consejo Nacional de Investigaciones Científicas y Técnicas, Ángel Gallardo 470, C1405DJR, Buenos Aires, Argentina
| | - Diego Baldo
- Laboratorio de Genética Evolutiva, Instituto de Biología Subtropical (Consejo Nacional de Investigaciones Científicas y Técnicas-Universidad Nacional de Misiones), Facultad de Ciencias Exactas Químicas y Naturales, Universidad Nacional de Misiones, N
| | - J. Sebastián Barrionuevo
- División Herpetología, Museo Argentino de Ciencias Naturales “Bernardino Rivadavia”—Consejo Nacional de Investigaciones Científicas y Técnicas, Ángel Gallardo 470, C1405DJR, Buenos Aires, Argentina
| | - Marissa Fabrezi
- Instituto de Bio y Geociencias del NOA, Centro Científico Tecnológico-Salta, Consejo Nacional de Investigaciones Científicas y Técnicas, 9 de Julio 14, 4405, Rosario de Lerma, Salta, Argentina
| | - Erik R. Wild
- Department of Biology and Museum of Natural History, University of Wisconsin-Stevens Point. Stevens Point, Wisconsin, 54022, USA
| | - Célio F.B. Haddad
- Departamento de Zoologia, Instituto de Biociências, Universidade Estadual Paulista, Avenida 24A1515, CEP 13506-900, Rio Claro, São Paulo, Brazil
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Ontogeny of the Thyroid Glands During Larval Development of South American Horned Frogs (Anura, Ceratophryidae). Evol Biol 2014. [DOI: 10.1007/s11692-014-9292-5] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Quinzio S, Fabrezi M. The lateral line system in anuran tadpoles: neuromast morphology, arrangement, and innervation. Anat Rec (Hoboken) 2014; 297:1508-22. [PMID: 24863412 DOI: 10.1002/ar.22952] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2013] [Accepted: 04/19/2014] [Indexed: 11/11/2022]
Abstract
Anuran larvae have been classified into four morphological types which reflect intraordinal macroevolution. At present, complete characterizations of the lateral line system are only available for Xenopus laevis (Type I) and Discoglossus pictus (Type III). We analyzed the morphology, arrangement, and innervation of neuromasts related to the anterodorsal and anteroventral lateral line nerves in 10 anuran species representing Types I, II, and IV with the aim of interpreting the existing variation and discussing the evolution of the lateral line in anuran larvae. We found: (1) the presence of two orbital and three mandibular neuromast lines in all anuran larvae studied, (2) the ventral arrangement of mandibular neuromast lines appears to have evolved convergently in Larval Types I and II, and the lateroventral arrangement of mandibular lines of neuromasts appears to have evolved in Larval Types III and IV; (3) interspecific variation in the organization, size, and number of sensory cells per neuromast within the lines; and (4) the supralabial extension of the Angular line in Lepidobatrachus spp. and the tentacular location of the Oral neuromasts in X. laevis are concomitant with their particular morphologies. Based on the variation described we find that the lateral line system in anuran larvae seems to have been maintained without significant changes, with the exception of Lepidobatrachus spp. and Xenopus. These unique features added to other of Lepidobatrachus tadpoles are sufficient to propose a new Larval Type (V).
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Affiliation(s)
- Silvia Quinzio
- Instituto de Bio y Geociencias (IBIGEO), Centro Científico Tecnológico-CONICET and Universidad Nacional de Salta, Mendoza 2, 4400, Salta, República Argentina
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Extreme tadpoles II: the highly derived larval anatomy of Occidozyga baluensis (Boulenger, 1896), an obligate carnivorous tadpole. ZOOMORPHOLOGY 2014. [DOI: 10.1007/s00435-014-0226-7] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
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Evans SE, Groenke JR, Jones MEH, Turner AH, Krause DW. New material of Beelzebufo, a hyperossified frog (Amphibia: Anura) from the late cretaceous of Madagascar. PLoS One 2014; 9:e87236. [PMID: 24489877 PMCID: PMC3905036 DOI: 10.1371/journal.pone.0087236] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2013] [Accepted: 12/18/2013] [Indexed: 01/12/2023] Open
Abstract
The extant anuran fauna of Madagascar is exceptionally rich and almost completely endemic. In recent years, many new species have been described and understanding of the history and relationships of this fauna has been greatly advanced by molecular studies, but very little is known of the fossil history of frogs on the island. Beelzebufo ampinga, the first named pre-Holocene frog from Madagascar, was described in 2008 on the basis of numerous disarticulated cranial and postcranial elements from the Upper Cretaceous (Maastrichtian) Maevarano Formation of Madagascar. These specimens documented the presence of a hyperossified taxon that differed strikingly from extant Malagasy frogs in its large size and heavy coarse cranial exostosis. Here we describe and analyse new, articulated, and more complete material of the skull, vertebral column, and hind limb, as well as additional isolated elements discovered since 2008. μCT scans allow a detailed understanding of both internal and external morphology and permit a more accurate reconstruction. The new material shows Beelzebufo to have been even more bizarre than originally interpreted, with large posterolateral skull flanges and sculptured vertebral spine tables. The apparent absence of a tympanic membrane, the strong cranial exostosis, and vertebral morphology suggest it may have burrowed during seasonally arid conditions, which have been interpreted for the Maevarano Formation from independent sedimentological and taphonomic evidence. New phylogenetic analyses, incorporating both morphological and molecular data, continue to place Beelzebufo with hyloid rather than ranoid frogs. Within Hyloidea, Beelzebufo still groups with the South American Ceratophryidae thus continuing to pose difficulties with both biogeographic interpretations and prior molecular divergence dates.
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Affiliation(s)
- Susan E. Evans
- Department of Cell and Developmental Biology, University College London, London, United Kingdom
| | - Joseph R. Groenke
- Department of Anatomical Sciences, Stony Brook University, Stony Brook, New York, United States of America
| | - Marc E. H. Jones
- Department of Cell and Developmental Biology, University College London, London, United Kingdom
- School of Earth and Environmental Sciences, The University of Adelaide, Adelaide, South Australia, Australia
| | - Alan H. Turner
- Department of Anatomical Sciences, Stony Brook University, Stony Brook, New York, United States of America
| | - David W. Krause
- Department of Anatomical Sciences, Stony Brook University, Stony Brook, New York, United States of America
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Bloom S, Ledon-Rettig C, Infante C, Everly A, Hanken J, Nascone-Yoder N. Developmental origins of a novel gut morphology in frogs. Evol Dev 2013; 15:213-23. [PMID: 23607305 PMCID: PMC3870478 DOI: 10.1111/ede.12035] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Phenotypic variation is a prerequisite for evolution by natural selection, yet the processes that give rise to the novel morphologies upon which selection acts are poorly understood. We employed a chemical genetic screen to identify developmental changes capable of generating ecologically relevant morphological variation as observed among extant species. Specifically, we assayed for exogenously applied small molecules capable of transforming the ancestral larval foregut of the herbivorous Xenopus laevis to resemble the derived larval foregut of the carnivorous Lepidobatrachus laevis. Appropriately, the small molecules that demonstrate this capacity modulate conserved morphogenetic pathways involved in gut development, including downregulation of retinoic acid (RA) signaling. Identical manipulation of RA signaling in a species that is more closely related to Lepidobatrachus, Ceratophrys cranwelli, yielded even more similar transformations, corroborating the relevance of RA signaling variation in interspecific morphological change. Finally, we were able to recover the ancestral gut phenotype in Lepidobatrachus by performing a reverse chemical manipulation to upregulate RA signaling, providing strong evidence that modifications to this specific pathway promoted the emergence of a lineage-specific phenotypic novelty. Interestingly, our screen also revealed pathways that have not yet been implicated in early gut morphogenesis, such as thyroid hormone signaling. In general, the chemical genetic screen may be a valuable tool for identifying developmental mechanisms that underlie ecologically and evolutionarily relevant phenotypic variation.
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Affiliation(s)
- Stephanie Bloom
- Department of Molecular Biomedical Sciences, College of Veterinary Medicine, North Carolina State University, Raleigh, NC 27606 USA
| | - Cris Ledon-Rettig
- Department of Molecular Biomedical Sciences, College of Veterinary Medicine, North Carolina State University, Raleigh, NC 27606 USA
| | - Carlos Infante
- Department of Organismic and Evolutionary Biology and Museum of Comparative Zoology, Harvard University, Cambridge, MA 02138 USA
| | - Anne Everly
- Department of Organismic and Evolutionary Biology and Museum of Comparative Zoology, Harvard University, Cambridge, MA 02138 USA
| | - James Hanken
- Department of Organismic and Evolutionary Biology and Museum of Comparative Zoology, Harvard University, Cambridge, MA 02138 USA
| | - Nanette Nascone-Yoder
- Department of Molecular Biomedical Sciences, College of Veterinary Medicine, North Carolina State University, Raleigh, NC 27606 USA
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