1
|
Sullivan JP, Hopkins CD, Pirro S, Peterson R, Chakona A, Mutizwa TI, Mukweze Mulelenu C, Alqahtani FH, Vreven E, Dillman CB. Mitogenome recovered from a 19 th Century holotype by shotgun sequencing supplies a generic name for an orphaned clade of African weakly electric fishes (Osteoglossomorpha, Mormyridae). Zookeys 2022; 1129:163-196. [PMID: 36761845 PMCID: PMC9836601 DOI: 10.3897/zookeys.1129.90287] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2022] [Accepted: 09/19/2022] [Indexed: 11/17/2022] Open
Abstract
Heteromormyrus Steindachner, 1866, a genus of Mormyridae (Teleostei: Osteoglossomorpha), has been monotypic since the description of Heteromormyruspauciradiatus (Steindacher, 1866) from a single specimen. No type locality other than "Angola" was given and almost no specimens have been subsequently identified to this species. In order to investigate the relationship of this taxon to fresh specimens collected in Angola and elsewhere, whole genome paired-end sequencing of DNA extracted from the holotype specimen of Heteromormyruspauciradiatus was performed and a nearly complete mitogenome assembled from the sequences obtained. Comparison of cytochrome oxidase I and cytochrome b sequences from this mitogenome to sequences from recently collected material reveal that Heteromormyruspauciradiatus is closely related to specimens identified as Hippopotamyrusansorgii (Boulenger, 1905), Hippopotamyrusszaboi Kramer, van der Bank & Wink, 2004, Hippopotamyruslongilateralis Kramer & Swartz, 2010, as well as to several undescribed forms from subequatorial Africa collectively referred to in the literature as the "Hippopotamyrusansorgii species complex" and colloquially known as "slender stonebashers." Previous molecular phylogenetic work has shown that these species are not close relatives of Hippopotamyruscastor Pappenheim, 1906, the type species of genus Hippopotamyrus Pappenheim, 1906 from Cameroon, and are thus misclassified. Hippopotamyrusansorgii species complex taxa and another species shown to have been misclassified, Paramormyropstavernei (Poll, 1972), are placed in genus Heteromormyrus and one genetic lineage from the Kwanza and Lucala rivers of Angola are identified as conspecific Heteromormyruspauciradiatus. Three additional new combinations and a synonymy in Mormyridae are introduced. The morphological characteristics and geographical distribution of the genus Heteromormyrus are reviewed. The electric organ discharges (EODs) of Heteromormyrus species are to be treated in a separate study.
Collapse
Affiliation(s)
- John P. Sullivan
- National Center for Biotechnology Information, National Library of Medicine, National Institutes of Health, Bethesda, Maryland, USA,Cornell University Museum of Vertebrates, Ithaca, New York, USA
| | - Carl D. Hopkins
- Cornell University Museum of Vertebrates, Ithaca, New York, USA,Department of Neurobiology and Behavior, Cornell University, Ithaca, New York, USA
| | | | - Rose Peterson
- The George Washington University, Washington, D.C., USA
| | - Albert Chakona
- NRF-South African Institute for Aquatic Biodiversity, Makhanda, South Africa,Department of Ichthyology and Fisheries Science, Rhodes University, Makhanda, South Africa
| | - Tadiwa I. Mutizwa
- NRF-South African Institute for Aquatic Biodiversity, Makhanda, South Africa,Department of Ichthyology and Fisheries Science, Rhodes University, Makhanda, South Africa
| | - Christian Mukweze Mulelenu
- Département de Zootechnie, Faculté des Sciences Agronomiques, Université de Kolwezi, Kolwezi, Democratic Republic of the Congo,Département de Gestion des Ressources Naturelles Renouvelables, Unité de recherche en Biodiversité et Exploitation durable des Zones Humides, Université de Lubumbashi, Lubumbashi, Democratic Republic of the Congo,Laboratory of Biodiversity and Evolutionary Genomics, Katholieke Universiteit, Leuven, Belgium,Zoology Department, Ichthyology, Royal Museum for Central Africa, Tervuren, Belgium
| | - Fahad H. Alqahtani
- National Centre for Bioinformatics, King Abdulaziz City for Science and Technology, Riyadh, Saudi Arabia
| | - Emmanuel Vreven
- Laboratory of Biodiversity and Evolutionary Genomics, Katholieke Universiteit, Leuven, Belgium,Zoology Department, Ichthyology, Royal Museum for Central Africa, Tervuren, Belgium
| | - Casey B. Dillman
- Cornell University Museum of Vertebrates, Ithaca, New York, USA,Department of Neurobiology and Behavior, Cornell University, Ithaca, New York, USA
| |
Collapse
|
2
|
Ford KL, Albert JS. Is the medium the message? Functional diversity across abiotic gradients in freshwater electric fishes. Integr Comp Biol 2022; 62:945-957. [DOI: 10.1093/icb/icac010] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Abstract
Evolutionary transitions across abiotic gradients can occur among habitats at multiple spatial scales, and among taxa and biotas through a range of ecological and evolutionary time frames. Two diverse groups of electric fishes, Neotropical Gymnotiformes and Afrotropical Mormyroidea, offer interesting examples of potentially convergent evolution in aspects of morphological, physiological, and life history traits. We examined biogeographical, morphological, and functional patterns across these two groups to assess the degree of convergence in association with abiotic environmental variables. While there are superficial similarities across the groups and continents, we found substantially more differences in terms of habitat occupancy, electric signal diversity, and morphological disparity. These differences likely correlate to differences in biogeographical histories across the Neotropics and Afrotropics, biotic factors associated with aquatic life and electric signals, and sampling issues plaguing both groups. Additional research and sampling are required to make further inferences about how electric fishes transition throughout diverse freshwater habitats across both microevolutionary and macroevolutionary scales. We find little evidence that abiotic gradients in the freshwater habitat medium have driven convergent evolution of functional traits in these two continental radiations of electric fishes.
Collapse
Affiliation(s)
- Kassandra L Ford
- Institute of Ecology and Evolution, Universität Bern, Switzerland
- Department of Biology, University of Louisiana at Lafayette, USA
| | - James S Albert
- Department of Biology, University of Louisiana at Lafayette, USA
| |
Collapse
|
3
|
Simanovsky S, Medvedev D, Tefera F, Golubtsov A. Derived karyotypes in two elephantfish genera ( Hyperopisus and Pollimyrus): lowest chromosome number in the family Mormyridae (Osteoglossiformes). COMPARATIVE CYTOGENETICS 2021; 15:345-354. [PMID: 34721818 PMCID: PMC8520028 DOI: 10.3897/compcytogen.v15.i4.67681] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 04/21/2021] [Accepted: 08/25/2021] [Indexed: 06/13/2023]
Abstract
The African weakly electric elephantfish family Mormyridae comprises 22 genera and almost 230 species. Up-to-date cytogenetic information was available for 17 species representing 14 genera. Here we report chromosome number and morphology in Hyperopisusbebe (Lacepède, 1803) and Pollimyrusisidori (Valenciennes, 1847) collected from the White Nile system in southwestern Ethiopia. Both taxa displayed the diploid chromosome number 2n = 40, but they differed in fundamental numbers: FN = 66 in H.bebe and FN = 72 in P.isidori; previously the same diploid chromosome number 2n = 40 was reported in an undescribed species of Pollimyrus Taverne, 1971 (FN = 42) from the same region. Our results demonstrate that not only pericentric inversions, but fusions also played a substantial role in the evolution of the mormyrid karyotype structure. If the hypothesis that the karyotype structure with 2n = 50-52 and prevalence of the uni-armed chromosomes close to the ancestral condition for the family Mormyridae is correct, the most derived karyotype structures are found in the Mormyrus Linnaeus, 1758 species with 2n = 50 and the highest number of bi-armed elements in their compliments compared to all other mormyrids and in Pollimyrusisidori with the highest number of bi-armed elements among the mormyrids with 2n = 40.
Collapse
Affiliation(s)
- Sergey Simanovsky
- Severtsov Institute of Ecology and Evolution, Russian Academy of Sciences, 33 Leninskij prosp., Moscow, 119071 RussiaSevertsov Institute of Ecology and Evolution, Russian Academy of SciencesMoscowRussia
| | - Dmitry Medvedev
- Severtsov Institute of Ecology and Evolution, Russian Academy of Sciences, 33 Leninskij prosp., Moscow, 119071 RussiaSevertsov Institute of Ecology and Evolution, Russian Academy of SciencesMoscowRussia
| | - Fekadu Tefera
- National Fishery and Aquatic Life Research Center, Ethiopian Institute of Agricultural Research, Sebeta, P.O. Box 64, EthiopiaEthiopian Institute of Agricultural ResearchSebetaEthiopia
| | - Alexander Golubtsov
- Severtsov Institute of Ecology and Evolution, Russian Academy of Sciences, 33 Leninskij prosp., Moscow, 119071 RussiaSevertsov Institute of Ecology and Evolution, Russian Academy of SciencesMoscowRussia
| |
Collapse
|
4
|
Mutizwa TI, Kadye WT, Chakona A. Deep genetic and morphological divergence in the Hippopotamyrus ansorgii species complex (Teleostei: Mormyridae) in southern Africa. JOURNAL OF FISH BIOLOGY 2021; 99:543-556. [PMID: 33811353 DOI: 10.1111/jfb.14743] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/04/2020] [Revised: 03/18/2021] [Accepted: 03/30/2021] [Indexed: 06/12/2023]
Abstract
The present study used molecular and morphological approaches to investigate hidden diversity within the Hippopotamyrus ansorgii species complex in southern Africa. Phylogenetic reconstructions and three species delimitation methods based on two mitochondrial markers (cytochrome b and cytochrome oxidase I) and one nuclear marker (S7) revealed 12 Molecular Operational Taxonomic Units (MOTUs), with two of them representing two recently described species, Hippopotamyrus longilateralis and Hippopotamyrus szaboi. The highest diversity occurred in the Kwanza River system, which contained five MOTUs, and the Upper Zambezi River system that had two MOTUs. Five other river systems contained a single MOTU each. A major impediment to the review of this complex has been the uncertainty surrounding the type locality of the specimens that were used for the description of H. ansorgii. The present study has, through a careful examination of published literature and synthesis of information on the travel activities of Dr. William Ansorge who collected the specimens, identified the Kwanza River system as the most plausible source of the syntypes. The resolution of the type locality of H. ansorgii facilitates future work on the review of this complex which is critical for providing reliable biodiversity estimates, identifying effective conservation management strategies and understanding the evolutionary history and biogeographic patterns of the fishes of this region.
Collapse
Affiliation(s)
- Tadiwa I Mutizwa
- Department of Ichthyology and Fisheries Science, Rhodes University, Makhanda (Grahamstown), South Africa
- NRF-South African Institute for Aquatic Biodiversity, Makhanda (Grahamstown), South Africa
| | - Wilbert T Kadye
- Department of Ichthyology and Fisheries Science, Rhodes University, Makhanda (Grahamstown), South Africa
| | - Albert Chakona
- Department of Ichthyology and Fisheries Science, Rhodes University, Makhanda (Grahamstown), South Africa
- NRF-South African Institute for Aquatic Biodiversity, Makhanda (Grahamstown), South Africa
| |
Collapse
|
5
|
Korniienko Y, Tiedemann R, Vater M, Kirschbaum F. Ontogeny of the electric organ discharge and of the papillae of the electrocytes in the weakly electric fish Campylomormyrus rhynchophorus (Teleostei: Mormyridae). J Comp Neurol 2021; 529:1052-1065. [PMID: 32785950 DOI: 10.1002/cne.25003] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2019] [Revised: 07/28/2020] [Accepted: 08/06/2020] [Indexed: 11/11/2022]
Abstract
The electric organ of the mormyrid weakly electric fish, Campylomormyrus rhynchophorus (Boulenger, 1898), undergoes changes in both the electric organ discharge (EOD) and the light and electron microscopic morphology as the fish mature from the juvenile to the adult form. Of particular interest was the appearance of papillae, surface specializations of the uninnervated anterior face of the electrocyte, which have been hypothesized to increase the duration of the EOD. In a 24.5 mm long juvenile the adult electric organ (EO) was not yet functional, and the electrocytes lacked papillae. A 40 mm long juvenile, which produced a short biphasic EOD of 1.3 ms duration, shows small papillae (average area 136 μm2 ). In contrast, the EOD of a 79 mm long juvenile was triphasic. The large increase in duration of the EOD to 23.2 ms was accompanied by a small change in size of the papillae (average area 159 μm2 ). Similarly, a 150 mm long adult produced a triphasic EOD of comparable duration to the younger stage (24.7 ms) but featured a prominent increase in size of the papillae (average area 402 μm2 ). Thus, there was no linear correlation between EOD duration and papillary size. The most prominent ultrastructural change was at the level of the myofilaments, which regularly extended into the papillae, only in the oldest specimen-probably serving a supporting function. Physiological mechanisms, like gene expression levels, as demonstrated in some Campylomormyrus species, might be more important concerning the duration of the EOD.
Collapse
Affiliation(s)
- Yevheniia Korniienko
- Humboldt University of Berlin, Faculty of Life Sciences, Albrecht Daniel Thaer-Institute of Agricultural and Horticultural Sciences, Unit of Biology and Ecology of Fishes, Berlin, Germany
| | - Ralph Tiedemann
- University of Potsdam, Institute of Biochemistry and Biology, Unit of Evolutionary Biology / Systematic Zoology, Potsdam-Golm, Germany
| | - Marianne Vater
- Unit of General Zoology, Institute of Biochemistry and Biology, University of Potsdam, Potsdam Golm, Germany
| | - Frank Kirschbaum
- Humboldt University of Berlin, Faculty of Life Sciences, Albrecht Daniel Thaer-Institute of Agricultural and Horticultural Sciences, Unit of Biology and Ecology of Fishes, Berlin, Germany
| |
Collapse
|
6
|
Mambo Baba T, Kisekelwa T, Danadu Mizani C, Decru E, Vreven E. Hidden species diversity in Marcusenius moorii (Teleostei: Mormyridae) from the Congo Basin. JOURNAL OF FISH BIOLOGY 2020; 96:1100-1122. [PMID: 31820447 DOI: 10.1111/jfb.14226] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/04/2019] [Accepted: 12/01/2019] [Indexed: 06/10/2023]
Abstract
New collections from the Yangambi Biosphere Reserve (YBR) and Okapi Wildlife Reserve (OWR) revealed the presence of two groups of specimens similar to, but different from Marcusenius moorii. To study both these groups, an integrated morphological and genetic (mtDNA, cytb) approach was used. This study revealed that one of the two groups is conspecific with Marcusenius lambouri, a junior synonym of M. moorii, which is herein revalidated, with M. moorii longulus as its junior synonym. Marcusenius lambouri differs from M. moorii by a higher number of lateral line scales (44-46 vs. 40-43), a shorter pectoral-fin length (14.6-19.9 vs. 20.3-25.2% standard length; LS ) and a more elongated body due to a usually shallower middle body depth (19.8-26.5 vs. 26.3-35.9% LS ). The other group revealed to be a new species for science, Marcusenius verheyenorum, which can be distinguished from its congeners with eight circumpeduncular scales by the following unique combination of characters: a rounded head with a terminal mouth; a short and deep caudal peduncle (middle caudal-peduncle depth, 44.9-54.6% caudal-peduncle length; LCP ), a deep body (middle body depth, 27.7-34.2% LS ), 38-43 scales on the lateral line, 40-41 vertebrae, 20-21 dorsal-fin rays and 26 anal-fin rays. Some specimens previously attributed to M. moorii were examined and reassigned to M. lambouri or M. verheyenorum. As a result, M. moorii and M. lambouri occur in sympatry in the middle Congo Basin, with the distribution area of M. moorii still further extending into the lower Congo Basin. Instead, the distribution of M. verheyenorum is limited to some right bank tributaries of the upstream part of the middle Congo Basin. Two museum records from the Lilanda River (YBR), collected in the 1950s and previously identified as M. moorii, were re-identified as belonging to the new species, M. verheyenorum. However, the species now seems locally extinct in that region, which reflects the significant anthropogenic effects even within this reserve.
Collapse
Affiliation(s)
- Taylor Mambo Baba
- Département d'Ecologie et Biodiversité des Ressources Aquatique, Centre de Surveillance de la Biodiversité (CSB), Université de Kisangani, Kisangani, R.D. Congo
| | - Tchalondawa Kisekelwa
- Unité d'Enseignement et de Recherche en Hydrobiologie Appliquée (UERHA), Institut Supérieure Pédagogique (ISP) de Bukavu, Biology-Chemistry Department, Bukavu, R.D. Congo
- Vertebrate Section, Ichthyology, Royal Museum for Central Africa (RMCA), Tervuren, Belgium
- Laboratory of Biodiversity and Evolutionary Genomics, KU Leuven, Leuven, Belgium
| | - Célestin Danadu Mizani
- Département d'Ecologie et Biodiversité des Ressources Aquatique, Centre de Surveillance de la Biodiversité (CSB), Université de Kisangani, Kisangani, R.D. Congo
| | - Eva Decru
- Vertebrate Section, Ichthyology, Royal Museum for Central Africa (RMCA), Tervuren, Belgium
- Laboratory of Biodiversity and Evolutionary Genomics, KU Leuven, Leuven, Belgium
| | - Emmanuel Vreven
- Vertebrate Section, Ichthyology, Royal Museum for Central Africa (RMCA), Tervuren, Belgium
- Laboratory of Biodiversity and Evolutionary Genomics, KU Leuven, Leuven, Belgium
| |
Collapse
|
7
|
Mukweze Mulelenu C, Katemo Manda B, Decru E, Chocha Manda A, Vreven E. The Cyphomyrus Myers 1960 (Osteoglossiformes: Mormyridae) of the Lufira basin (Upper Lualaba: DR Congo): A generic reassignment and the description of a new species. JOURNAL OF FISH BIOLOGY 2020; 96:1123-1141. [PMID: 31856294 DOI: 10.1111/jfb.14237] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/09/2019] [Accepted: 12/15/2019] [Indexed: 06/10/2023]
Abstract
Within a comparative morphological framework, Hippopotamyrus aelsbroecki, only known from the holotype originating from Lubumbashi, most probably the Lubumbashi River, a left bank subaffluent of the Luapula River, is reallocated to the genus Cyphomyrus. This transfer is motivated by the fact that H. aelsbroecki possesses a rounded or vaulted predorsal profile, an insertion of the dorsal fin far anterior to the level of the insertion of the anal fin, and a compact, laterally compressed and deep body. In addition, a new species of Cyphomyrus is described from the Lufira basin, Cyphomyrus lufirae. Cyphomyrus lufirae was collected in large parts of the Middle Lufira, upstream of the Kyubo Falls and just downstream of these falls in the lower Lufira and its nearby left bank affluent, the Luvilombo River. The new species is distinguished from all its congeners, that is, firstly, from C. aelsbroecki, C. cubangoensis and C. discorhynchus, by a low number of dorsal fin rays, 27-32 (vs. higher, 36 (37), 34 (33-41) an 38 (38-40), respectively) and, secondly, from C. aelsbroecki, C. cubangoensis, and C. discorhynchus by a large prepelvic distance, 41.0-43.8% LS (vs. shorter, 39.7%, 38.9-39.1% and 37.0-41.0% LS , respectively). The description of yet another new species for the Upemba National Park and the Kundelungu National Park further highlights their importance for fish protection and conservation in the area. Hence, there is an urgent need for the full integration of fish into the management plans of these parks.
Collapse
Affiliation(s)
- Christian Mukweze Mulelenu
- Département de Zootechnie, Faculté des Sciences Agronomiques, Université de Kolwezi, Kolwezi, Democratic Republic of the Congo
- Département de Gestion des Ressources Naturelles Renouvelables, Unité de recherche en Biodiversité et Exploitation durable des Zones Humides, Université de Lubumbashi, Lubumbashi, Democratic Republic of the Congo
- Vertebrate Section, Ichthyology, Royal Museum for Central Africa, Tervuren, Belgium
- Laboratory of Biodiversity and Evolutionary Genomics, KU Leuven, Leuven, Belgium
| | - Bauchet Katemo Manda
- Département de Gestion des Ressources Naturelles Renouvelables, Unité de recherche en Biodiversité et Exploitation durable des Zones Humides, Université de Lubumbashi, Lubumbashi, Democratic Republic of the Congo
- Vertebrate Section, Ichthyology, Royal Museum for Central Africa, Tervuren, Belgium
- Laboratory of Biodiversity and Evolutionary Genomics, KU Leuven, Leuven, Belgium
| | - Eva Decru
- Vertebrate Section, Ichthyology, Royal Museum for Central Africa, Tervuren, Belgium
- Laboratory of Biodiversity and Evolutionary Genomics, KU Leuven, Leuven, Belgium
| | - Auguste Chocha Manda
- Département de Gestion des Ressources Naturelles Renouvelables, Unité de recherche en Biodiversité et Exploitation durable des Zones Humides, Université de Lubumbashi, Lubumbashi, Democratic Republic of the Congo
| | - Emmanuel Vreven
- Vertebrate Section, Ichthyology, Royal Museum for Central Africa, Tervuren, Belgium
- Laboratory of Biodiversity and Evolutionary Genomics, KU Leuven, Leuven, Belgium
| |
Collapse
|
8
|
Cutler JS, Olivos JA, Sidlauskas B, Arismendi I. Evaluating the distribution of freshwater fish diversity using a multispecies habitat suitability model to assess impacts of proposed dam development in Gabon, Africa. CONSERVATION SCIENCE AND PRACTICE 2020. [DOI: 10.1111/csp2.151] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
Affiliation(s)
- Joseph S. Cutler
- University of California Santa CruzDepartment of Ecology and Evolutionary Biology California Santa Cruz
| | - Juan Andrés Olivos
- Department of Fisheries and WildlifeOregon State University Corvallis Oregon
| | - Brian Sidlauskas
- Department of Fisheries and WildlifeOregon State University Corvallis Oregon
| | - Ivan Arismendi
- Department of Fisheries and WildlifeOregon State University Corvallis Oregon
| |
Collapse
|
9
|
Simanovsky S, Medvedev D, Tefera F, Golubtsov A. First cytogenetic information for five Nilotic elephantfishes and a problem of ancestral karyotype of the family Mormyridae (Osteoglossiformes). COMPARATIVE CYTOGENETICS 2020; 14:387-397. [PMID: 32904050 PMCID: PMC7449985 DOI: 10.3897/compcytogen.14i3.52727] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/07/2020] [Accepted: 07/23/2020] [Indexed: 05/17/2023]
Abstract
The elephantfish family Mormyridae is the most diverse lineage of the primitive teleostean clade Osteoglossomorpha distributed in inland waters of all continents except Antarctica and Europe. The family Mormyridae is endemic to Africa and includes 22 genera and almost 230 species. The evolutionary radiation of mormyrids most probably should be attributed to their capability of both generating and receiving weak electric signals. Up-to-date cytogenetic studies have revealed substantial karyotype differentiation among the nine investigated elephantfish species and genera (a single species studied per each genus). In the present study, karyotypes of five species representing five mormyrid genera (four unexplored ones) collected from the White Nile system in southwestern Ethiopia are described for the first time. The results show substantial variety of the diploid chromosome and fundamental numbers: 2n = 48 and FN = 54 in Brevimyrus niger (Günther, 1866), 2n = 50 and FN = 72 in Cyphomyrus petherici (Boulenger, 1898), 2n = 50 and FN = 78 in Hippopotamyrus pictus (Marcusen, 1864), 2n = 50 and FN = 76 in Marcusenius cyprinoides (Linnaeus, 1758), 2n = 52 and FN = 52 in Mormyrops anguilloides (Linnaeus, 1758). Karyotype structure in the latter species seems to be close to the ancestral condition for the family. This hypothesis is discussed in the light of available data on karyotype diversity and phylogeny of mormyrids.
Collapse
Affiliation(s)
- Sergey Simanovsky
- Severtsov Institute of Ecology and Evolution, Russian Academy of Sciences, 33 Leninskij prosp., Moscow, 119071, RussiaRussian Academy of SciencesMoscowRussia
| | - Dmitry Medvedev
- Severtsov Institute of Ecology and Evolution, Russian Academy of Sciences, 33 Leninskij prosp., Moscow, 119071, RussiaRussian Academy of SciencesMoscowRussia
| | - Fekadu Tefera
- National Fishery and Aquatic Life Research Center, Ethiopian Institute of Agricultural Research, Sebeta, P.O. Box 64, EthiopiaEthiopian Institute of Agricultural ResearchSebetaEthiopia
| | - Alexander Golubtsov
- Severtsov Institute of Ecology and Evolution, Russian Academy of Sciences, 33 Leninskij prosp., Moscow, 119071, RussiaRussian Academy of SciencesMoscowRussia
| |
Collapse
|
10
|
Capobianco A, Friedman M. Vicariance and dispersal in southern hemisphere freshwater fish clades: a palaeontological perspective. Biol Rev Camb Philos Soc 2018; 94:662-699. [DOI: 10.1111/brv.12473] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2018] [Revised: 09/17/2018] [Accepted: 09/19/2018] [Indexed: 02/07/2023]
Affiliation(s)
- Alessio Capobianco
- Museum of Paleontology and Department of Earth and Environmental Sciences; University of Michigan; 1105 N. University Ave, Ann Arbor MI 48109-1079 U.S.A
| | - Matt Friedman
- Museum of Paleontology and Department of Earth and Environmental Sciences; University of Michigan; 1105 N. University Ave, Ann Arbor MI 48109-1079 U.S.A
| |
Collapse
|
11
|
Hilton EJ, Lavoué S. A review of the systematic biology of fossil and living bony-tongue fishes, Osteoglossomorpha (Actinopterygii: Teleostei). NEOTROPICAL ICHTHYOLOGY 2018. [DOI: 10.1590/1982-0224-20180031] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
ABSTRACT The bony-tongue fishes, Osteoglossomorpha, have been the focus of a great deal of morphological, systematic, and evolutionary study, due in part to their basal position among extant teleostean fishes. This group includes the mooneyes (Hiodontidae), knifefishes (Notopteridae), the abu (Gymnarchidae), elephantfishes (Mormyridae), arawanas and pirarucu (Osteoglossidae), and the African butterfly fish (Pantodontidae). This morphologically heterogeneous group also has a long and diverse fossil record, including taxa from all continents and both freshwater and marine deposits. The phylogenetic relationships among most extant osteoglossomorph families are widely agreed upon. However, there is still much to discover about the systematic biology of these fishes, particularly with regard to the phylogenetic affinities of several fossil taxa, within Mormyridae, and the position of Pantodon. In this paper we review the state of knowledge for osteoglossomorph fishes. We first provide an overview of the diversity of Osteoglossomorpha, and then discuss studies of the phylogeny of Osteoglossomorpha from both morphological and molecular perspectives, as well as biogeographic analyses of the group. Finally, we offer our perspectives on future needs for research on the systematic biology of Osteoglossomorpha.
Collapse
Affiliation(s)
| | - Sébastien Lavoué
- National Taiwan University, Taiwan; Universiti Sains Malaysia, Malaysia
| |
Collapse
|
12
|
Levin BA, Golubtsov AS. New insights into the molecular phylogeny and taxonomy of mormyrids (Osteoglossiformes, Actinopterygii) in northern East Africa. J ZOOL SYST EVOL RES 2017. [DOI: 10.1111/jzs.12186] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Boris A. Levin
- Institute of Biology of Inland Waters; Russian Academy of Sciences; Borok Yaroslavl District Russia
- Cherepovets State University; Vologda Region Cherepovets Russia
| | - Alexander S. Golubtsov
- Institute of Biology of Inland Waters; Russian Academy of Sciences; Borok Yaroslavl District Russia
- A.N. Severtsov Institute of Ecology and Evolution; Russian Academy of Sciences; Moscow Russia
| |
Collapse
|
13
|
Rich M, Sullivan JP, Hopkins CD. Rediscovery and description of Paramormyrops sphekodes (Sauvage, 1879) and a new cryptic Paramormyrops (Mormyridae: Osteoglossiformes) from the Ogooué River of Gabon using morphometrics, DNA sequencing and electrophysiology. Zool J Linn Soc 2017. [DOI: 10.1093/zoolinnean/zlw004] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Affiliation(s)
- Madeline Rich
- College of Agriculture and Life Sciences, Cornell University, Ithaca, NY 14853, USA
- Cornell University Museum of Vertebrates, 159 Sapsucker Woods Road, Ithaca, NY 14850, USA
| | - John P. Sullivan
- Cornell University Museum of Vertebrates, 159 Sapsucker Woods Road, Ithaca, NY 14850, USA
| | - Carl D. Hopkins
- Cornell University Museum of Vertebrates, 159 Sapsucker Woods Road, Ithaca, NY 14850, USA
- Department of Neurobiology and Behavior, 265 Seeley G. Mudd Hall, Cornell University, Ithaca, NY 14853-2702, USA
| |
Collapse
|
14
|
Nagel R, Kirschbaum F, Tiedemann R. Electric organ discharge diversification in mormyrid weakly electric fish is associated with differential expression of voltage-gated ion channel genes. J Comp Physiol A Neuroethol Sens Neural Behav Physiol 2017; 203:183-195. [DOI: 10.1007/s00359-017-1151-2] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2016] [Revised: 01/23/2017] [Accepted: 01/25/2017] [Indexed: 11/30/2022]
|