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Alcantara EP, Ebert MB, Ferreira-Silva C, Forti LR, Morais DH, Pérez-Ponce de León G, Silva RJ. An integrative taxonomy study reveals a rare new species of the genus Creptotrema (Trematoda: Allocreadiidae) in an endangered frog in South America. J Helminthol 2024; 98:e23. [PMID: 38462988 DOI: 10.1017/s0022149x24000099] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/12/2024]
Abstract
During an ecological study with a near-endangered anuran in Brazil, the Schmidt's Spinythumb frog, Crossodactylus schmidti Gallardo, 1961, we were given a chance to analyze the gastrointestinal tract of a few individuals for parasites. In this paper, we describe a new species of an allocreadiid trematode of the genus Creptotrema Travassos, Artigas & Pereira, 1928, which possesses a unique trait among allocreadiids (i.e., a bivalve shell-like muscular structure at the opening of the ventral sucker); the new species represents the fourth species of allocreadiid trematode parasitizing amphibians. Besides, the new species is distinguished from other congeners by the combination of characters such as the body size, ventral sucker size, cirrus-sac size, and by having small eggs. DNA sequences through the 28S rDNA and COI mtDNA further corroborated the distinction of the new species. Phylogenetic analyses placed the newly generated sequences in a monophyletic clade together with all other sequenced species of Creptotrema. Genetic divergences between the new species and other Creptotrema spp. varied from 2.0 to 4.2% for 28S rDNA, and 15.1 to 16.8% for COI mtDNA, providing robust validation for the recognition of the new species. Even though allocreadiids are mainly parasites of freshwater fishes, our results confirm anurans as hosts of trematodes of this family. Additionally, we propose the reallocation of Auriculostoma ocloya Liquin, Gilardoni, Cremonte, Saravia, Cristóbal & Davies, 2022 to the genus Creptotrema. This study increases the known diversity of allocreadiids and contributes to our understanding of their evolutionary relationships, host-parasite relationships, and biogeographic history.
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Affiliation(s)
- E P Alcantara
- Universidade Estadual Paulista (UNESP), Instituto de Biosciências, Setor de Parasitologia, Rua Professor Doutor Antônio Celso Wagner Zanin, 250, Botucatu, São Paulo18618-689, Brazil
| | - M B Ebert
- Universidade Estadual Paulista (UNESP), Instituto de Biosciências, Setor de Parasitologia, Rua Professor Doutor Antônio Celso Wagner Zanin, 250, Botucatu, São Paulo18618-689, Brazil
| | - C Ferreira-Silva
- Universidade Federal do Ceará (UFC), Departamento de Biologia, Centro de Ciências, Av. Mister Hull, s/n, CEP 60455-760, Fortaleza, Ceará, Brazil
| | - L R Forti
- Departamento de Biociências, Universidade Federal Rural do Semi-Árido (UFERSA), Av. Francisco Mota, 572 - Bairro Costa e Silva, 59625-900, Mossoró - Rio Grande do Norte, Brazil
| | - D H Morais
- Universidade Federal de Uberlândia (UFU), Instituto de Ciências Agrárias, LMG-746, Km 1, Monte Carmelo, 38500-000, MG, Brazil
| | - G Pérez-Ponce de León
- Escuela Nacional de Estudios Superiores Unidad Mérida (ENES)-UNAM, Km 4.5 Carretera Mérida-Tetiz, Ucú, Yucatán, Mexico
| | - R J Silva
- Universidade Estadual Paulista (UNESP), Instituto de Biosciências, Setor de Parasitologia, Rua Professor Doutor Antônio Celso Wagner Zanin, 250, Botucatu, São Paulo18618-689, Brazil
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Solórzano-García B, Hernández-Mena DI, Choudhury A, Pérez-Ponce de León G. The complete mitochondrial genome of 3 species of allocreadiids (Digenea, Allocreadiidae): characterization and phylogenetic position within the order Plagiorchiida. Parasitology 2024; 151:309-318. [PMID: 38223986 PMCID: PMC11007277 DOI: 10.1017/s0031182024000064] [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: 10/19/2023] [Revised: 12/19/2023] [Accepted: 01/09/2024] [Indexed: 01/16/2024]
Abstract
Trematodes of the family Allocreadiidae are primarily found in the intestines of freshwater fishes around the world. The family includes 15 genera and c. 130 species. The last 2 decades have witnessed an increase in the genetic library of its species. Molecular data have been crucial for species delimitation and species description within Allocreadiidae and for understanding their evolutionary and biogeographical history and classification. Here, the mitogenomes of 3 species of allocreadiids were obtained using high throughput sequencing methods. Mitogenomes were compared with other members of the order Plagiorchiida to determine their molecular composition, gene rearrangement and phylogenetic interrelationships. The complete circular mitogenomes of Allocreadium lobatum, Creptotrematina aguirrepequenoi and Wallinia mexicana were 14 424, 13 769 and 13 924 bp long respectively, comprising 12 protein-coding genes, 22 transfer RNA genes, 2 ribosomal RNA genes and 2 non-coding regions. Gene arrangements were identical to other Xiphidiatan trematodes. Phylogenetic analyses using the mitogenomes revealed Allocreadiidae as a monophyletic group closely related to other members of the suborder Xiphidiata; A. lobatum was yielded as the sister taxon of C. aguirrepequenoi + W. mexicana. Our study increases the complete mitochondrial genome library of trematodes and strengthens our understanding of the phylogenetic relationships and classification of this parasite group.
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Affiliation(s)
- Brenda Solórzano-García
- Escuela Nacional de Estudios Superiores unidad Mérida (ENES-Mérida, UNAM), Mérida, Yucatán, Mexico
| | - David I. Hernández-Mena
- Escuela Nacional de Estudios Superiores unidad Mérida (ENES-Mérida, UNAM), Mérida, Yucatán, Mexico
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Vainutis KS, Voronova AN, Urabe M, Kazarin VM. Integrative approach for discovering of the new species within the genus Allocreadium Looss, 1900 (Trematoda: Allocreadiidae) and framing of biogeographical hypotheses for the genus. Syst Parasitol 2023; 100:189-213. [PMID: 36522565 DOI: 10.1007/s11230-022-10081-1] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2022] [Accepted: 12/04/2022] [Indexed: 12/23/2022]
Abstract
In July 2012 new Allocreadium species was isolated from Carassius gibelio caught in the Arsenyevka River, Primorsky region, Russia. Analyses on the morphometrics and internal organs' topology revealed that these worms are morphologically closest with A. isoporum but both species are independent according to high genetic distances based on the 28S gene fragment (5.434±0.0073%). Unlike A. isoporum found earlier in Europe, the new species named A. pseudoisoporum sp. nov. has a shorter body length and the vitellarium not reaching the posterior end of the body at some distance and its anterior border is on the level of the ventral sucker. Allocreadium pseudoisoporum sp. nov. differs from seven species previously found in the Russian Far East with the following features: smaller size of the body, suckers' ratio, range values, and topology of internal structures. Newly localities in the Pavlovka River and the Artyomovka River were discovered for A. khankaiensis. Morphological variability of the worms from the Pavlovka River was observed in comparison with A. khankaiensis from the Komissarovka River. Using scanning electron microscope, we examined external surfaces of three species (A. pseudoisoporum sp. nov., A. khankaiensis, A. hemibarbi) and observed structures reminiscent sensory receptors. This study was aimed to describe species diversity of allocreadiids inhabiting the south of Primorsky region, and to clarify phylogenetic relationships between the species from the genus Allocreadium Looss, 1900 using molecular genetic methods. The phylogenetic Bayesian tree based on the 28S gene showed a clear separation of ten Allocreadium species and confirmed the validity of A. pseudoisoporum sp. nov. Allocreadium pseudoisoporum sp. nov. is most similar to A. gotoi (genetic distances - 3.578±0.0051% in 28S, and 18.777±0.0149% in cox1), and represented the earliest divergent lineage in Allocreadium clade on the phylogenetic tree based on the 28S gene, thereby indicating its proximity to the ancestral node. Also, dichotomous keys for 25 Palearctic species of Allocreadium were prepared based on the morphology of the adult worms.
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Affiliation(s)
- Konstantin S Vainutis
- Pacific Branch of the Federal State Budget Scientific Institution "Russian Federal Research Institute of Fisheries and Oceanography", 4 Alley Shevchenko, Vladivostok, Russian Federation, 690091. .,The Far Eastern State Technical Fisheries University (FESTFU), 52B Lugovaya Street, Vladivostok, Russian Federation, 690087. .,Federal Scientific Center of the East Asia Terrestrial Biodiversity, Far Eastern Branch of the Russian Academy of Sciences, pr. 100-letija, 159, Vladivostok, Russian Federation, 690022.
| | - Anastasia N Voronova
- Pacific Branch of the Federal State Budget Scientific Institution "Russian Federal Research Institute of Fisheries and Oceanography", 4 Alley Shevchenko, Vladivostok, Russian Federation, 690091
| | - Misako Urabe
- Department of Ecosystem Studies, Faculty of Environmental Science, The University of Shiga Prefecture, Shiga, 522-8533, Japan
| | - Vitaly M Kazarin
- Federal Scientific Center of the East Asia Terrestrial Biodiversity, Far Eastern Branch of the Russian Academy of Sciences, pr. 100-letija, 159, Vladivostok, Russian Federation, 690022
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Alcantara EP, Úngari LP, Müller MI, Ferreira-Silva C, Emmerich E, O'Dwyer LH, Silva RJ. Phylogenetic position of Gorgoderina parvicava Travassos, 1922 (Digenea: Gorgoderidae), a parasite of Leptodactylus labyrinthicus (Spix, 1824) (Anura: Leptodactylidae) in Brazil. BRAZ J BIOL 2023; 82:e263745. [PMID: 36629540 DOI: 10.1590/1519-6984.263745] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2022] [Accepted: 11/28/2022] [Indexed: 01/11/2023] Open
Abstract
During a parasite survey in Brazilian amphibians from São Paulo state, Brazil, Gorgoderina parvicava Travassos, 1922 was found in the urinary bladder (11 adult worms) and (five juvenile worms) in the kidneys of the pepper-frog Leptodactylus labyrinthicus (Spix, 1824). Parasites were examined by microscopy and 28S rDNA and COI gene were sequenced and analyzed for the molecular study. The phylogenetic reconstructions resulted in identical topologies with highly supported values in the nodes in most clades using Maximum likelihood and Bayesian inference methods and positioned G. parvicava in the subclade formed by species of subfamily Gorgoderinae parasitizing the urinary bladder of amphibians. Molecular phylogenetic data showed that this species is related to other species of Gorgoderina. In addition, new molecular data and the analyses of genetic distances provide extra comparative data, which can be applied in further investigations on the taxonomic status and the diversity among Gorgoderina spp. and host-parasite relationships.
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Affiliation(s)
- E P Alcantara
- Universidade Estadual Paulista "Júlio de Mesquita Filho" - UNESP, Programa de Pós-graduação em Ciências Biológicas (Zoologia), Laboratório de Parasitologia de Animais Silvestres, Botucatu, SP, Brasil
| | - L P Úngari
- Universidade Estadual Paulista "Júlio de Mesquita Filho" - UNESP, Programa de Pós-graduação em Ciências Biológicas (Zoologia), Laboratório de Parasitologia de Animais Silvestres, Botucatu, SP, Brasil
| | - M I Müller
- Universidade Federal de São Paulo - UNIFESP, Departamento de Ecologia e Evolucão, Laboratório de Ecologia e Evolução, Unidade José Filippi, Diadema, SP, Brasil
| | - C Ferreira-Silva
- Universidade Estadual Paulista "Júlio de Mesquita Filho" - UNESP, Programa de Pós-graduação em Ciências Biológicas (Zoologia), Laboratório de Parasitologia de Animais Silvestres, Botucatu, SP, Brasil
| | - E Emmerich
- Universidade Estadual Paulista "Júlio de Mesquita Filho" - UNESP, Programa de Pós-graduação em Ciências Biológicas (Zoologia), Laboratório de Parasitologia de Animais Silvestres, Botucatu, SP, Brasil
| | - L H O'Dwyer
- Universidade Estadual Paulista "Júlio de Mesquita Filho" - UNESP, Programa de Pós-graduação em Ciências Biológicas (Zoologia), Laboratório de Parasitologia de Animais Silvestres, Botucatu, SP, Brasil
| | - R J Silva
- Universidade Estadual Paulista "Júlio de Mesquita Filho" - UNESP, Programa de Pós-graduação em Ciências Biológicas (Zoologia), Laboratório de Parasitologia de Animais Silvestres, Botucatu, SP, Brasil
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Discovery of a New Genus and Species of Allocreadiidae (Trematoda) in Mexico: Mesoamericatrema Magnisacculus n. Gen. n. Sp. Helminthologia 2022; 59:284-300. [PMID: 36694829 PMCID: PMC9831523 DOI: 10.2478/helm-2022-0029] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2022] [Accepted: 08/30/2022] [Indexed: 12/23/2022] Open
Abstract
The trematodes of Allocreadiidae are mainly parasites of freshwater fish and the family contains 18 valid genera. Since 2004, 4 genera have been described in the Americas: Paracreptotrema, Paracreptotrematoides, Pseudoparacreptotrema and Auriculostoma, of which the latter was recently synonymized with Creptotrema by Franceschini et al., (2021). During a study in 2018 on fish parasites of Lacantún River, Chiapas, Mexico, allocreadiids were collected from the intestine of Atherinella alvarezi and morphological differences with other genera of the family were immediately noted. These differences were corroborated with molecular data and phylogenetic analyses, which indicated that it was a new genus and species. The objective of this study is to describe the new taxon, which we name Mesoamericatrema magnisacculus n. gen., n. sp. as well as to clarify its phylogenetic relationships, host specificity, and geographical distribution. For this, we carried out a meticulous study of the morphology and compared the new taxon with its congeners. We also obtained sequences of the 28S and ITS from the ribosomal RNA region that were used in generating molecular phylogenies and in calculating genetic distances with sequences of other species of Allocreadiidae available in the Genbank. The new genus is mainly characterized by having a very large cirrus sac in relation to the length of its body and nests in a clade that groups Creptotrema, Creptotrematina, Paracreptotrema, Paracreptotrematoides, Pseudoparacreptotrema and Wallinia, all of which have a Neotropical affinity in terms of their geographic and host distribution. Mesoamericatrema n. gen. is the fifth genus of Allocreadiidae to be described in the Americas since 2004, the third discovered in Mexico since 2016, and the first to be described as parasitizing Atheriniformes, which indicates that Middle America is a region where important speciation events have occurred in freshwater fish parasites.
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