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Volume 14
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10.3390/pathogens14050467
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Article

Integrative Taxonomy of Tereancistrum spp. (Monopisthocotyla: Dactylogyridae) Parasites of the Gills of Freshwater Fishes from the Caatinga Domain, Brazil

by
Priscilla de Oliveira Fadel Yamada
1,2,*,
Wallas Benevides Barbosa de Sousa
2,
Mariana Bertholdi Ebert
2,
Maria Fernanda Barros Gouveia Diniz
2,
Marcos Tavares-Dias
1,3,
Reinaldo José da Silva
4 and
Fabio Hideki Yamada
2
1
Programa de Pós-Graduação em Diversidade Tropical (PPGBio), Universidade Federal do Amapá (UNIFAP), Macapá 68903-419, AP, Brazil
2
Programa de Pós-Graduação em Diversidade Biológica e Recursos Naturais (PPGDR), Universidade Regional do Cariri (URCA), Crato 63105-000, CE, Brazil
3
Embrapa Amapá, Macapá 68903-419, AP, Brazil
4
Instituto de Biociências, Departamento de Biodiversidade e Bioestatística, Universidade Estadual Paulista (UNESP), Botucatu 18618-689, SP, Brazil
*
Author to whom correspondence should be addressed.
Pathogens 2025, 14(5), 467; https://doi.org/10.3390/pathogens14050467 (registering DOI)
Submission received: 2 March 2025 / Revised: 18 April 2025 / Accepted: 22 April 2025 / Published: 10 May 2025
Versions Notes

Abstract

Tereancistrum is a common genus of Neotropical monopisthocotylans; however, information on its diversity and phylogeny remains limited. In this study, we describe four new species of Tereancistrum parasitizing the gills of Prochilodus brevis (Characiformes: Prochilodontidae) from a weir in the state of Ceará, Brazil. Tereancistrum spiralocirrum n. sp. and Tereancistrum scleritelongatum n. sp. are characterized by a dextro-ventral vaginal pore and a Y-shaped dorsal bar. Notably, Tereancistrum spiralocirrum n. sp. is the first species in the genus to possess a male copulatory organ (MCO) with multiple rings (16 to 18). In contrast, Tereancistrum ancistrum n. sp. and Tereancistrum kritskyi n. sp. are distinguished by a sinistral vaginal pore, a sclerotized MCO in the form of a coiled tube with slightly more than one clockwise ring, and an accessory piece that is non-articulated with the base of the MCO. However, Tereancistrum ancistrum n. sp. is unique in lacking a dorsal bar. Sequences of the LSU rDNA obtained from seven species of Tereancistrum parasitizing P. brevis and Leporinus piau, along with published sequences of other Dactylogyridae members, were included in the molecular analyses. Phylogenetic reconstructions supported the monophyly of Tereancistrum.
Keywords: new species; Prochilodontidae; Anostomidae; Neotropical region; LSU rDNA; molecular data; phylogenetic analyses new species; Prochilodontidae; Anostomidae; Neotropical region; LSU rDNA; molecular data; phylogenetic analyses

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MDPI and ACS Style

Yamada, P.d.O.F.; de Sousa, W.B.B.; Ebert, M.B.; Diniz, M.F.B.G.; Tavares-Dias, M.; da Silva, R.J.; Yamada, F.H. Integrative Taxonomy of Tereancistrum spp. (Monopisthocotyla: Dactylogyridae) Parasites of the Gills of Freshwater Fishes from the Caatinga Domain, Brazil. Pathogens 2025, 14, 467. https://doi.org/10.3390/pathogens14050467

AMA Style

Yamada PdOF, de Sousa WBB, Ebert MB, Diniz MFBG, Tavares-Dias M, da Silva RJ, Yamada FH. Integrative Taxonomy of Tereancistrum spp. (Monopisthocotyla: Dactylogyridae) Parasites of the Gills of Freshwater Fishes from the Caatinga Domain, Brazil. Pathogens. 2025; 14(5):467. https://doi.org/10.3390/pathogens14050467

Chicago/Turabian Style

Yamada, Priscilla de Oliveira Fadel, Wallas Benevides Barbosa de Sousa, Mariana Bertholdi Ebert, Maria Fernanda Barros Gouveia Diniz, Marcos Tavares-Dias, Reinaldo José da Silva, and Fabio Hideki Yamada. 2025. "Integrative Taxonomy of Tereancistrum spp. (Monopisthocotyla: Dactylogyridae) Parasites of the Gills of Freshwater Fishes from the Caatinga Domain, Brazil" Pathogens 14, no. 5: 467. https://doi.org/10.3390/pathogens14050467

APA Style

Yamada, P. d. O. F., de Sousa, W. B. B., Ebert, M. B., Diniz, M. F. B. G., Tavares-Dias, M., da Silva, R. J., & Yamada, F. H. (2025). Integrative Taxonomy of Tereancistrum spp. (Monopisthocotyla: Dactylogyridae) Parasites of the Gills of Freshwater Fishes from the Caatinga Domain, Brazil. Pathogens, 14(5), 467. https://doi.org/10.3390/pathogens14050467

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