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Issue: Vol. 5729 No. 1: 12 Dec. 2025
Type: Article
Published: 2025-12-12
DOI: 10.11646/zootaxa.5729.1.5
Page range: 135-150
Abstract views: 43
PDF downloaded: 4

New species of Diaphorocleidus and Urocleidoides with a redescription of Curvianchoratus hexacleidus (Monopisthocotyla: Dactylogyridae) parasitizing characiform fishes from the Munim River Basin, northeastern Brazil

Laboratório de Helmintos Parasitos de Peixes; Instituto Oswaldo Cruz; FIOCRUZ. Avenida Brasil 4365; 21040-360 Rio de Janeiro; RJ; Brazil.
Laboratório de Helmintos Parasitos de Peixes; Instituto Oswaldo Cruz; FIOCRUZ. Avenida Brasil 4365; 21040-360 Rio de Janeiro; RJ; Brazil.; Laboratório de Sistemática e Ecologia de Organismos Aquáticos; Universidade Federal do Maranhão (UFMA); Campus de Chapadinha; BR-222; KM 04; S/N; Chapadinha; MA; Brazil.
Laboratório de Sistemática e Ecologia de Organismos Aquáticos; Universidade Federal do Maranhão (UFMA); Campus de Chapadinha; BR-222; KM 04; S/N; Chapadinha; MA; Brazil.; NRF-South African Institute for Aquatic Biodiversity (NRF-SAIAB); P. Bag 1015; Makhanda 6140; South Africa.
Laboratório de Helmintos Parasitos de Peixes; Instituto Oswaldo Cruz; FIOCRUZ. Avenida Brasil 4365; 21040-360 Rio de Janeiro; RJ; Brazil.
Laboratório de Helmintos Parasitos de Peixes; Instituto Oswaldo Cruz; FIOCRUZ. Avenida Brasil 4365; 21040-360 Rio de Janeiro; RJ; Brazil.
Laboratório de Helmintos Parasitos de Peixes; Instituto Oswaldo Cruz; FIOCRUZ. Avenida Brasil 4365; 21040-360 Rio de Janeiro; RJ; Brazil.
Platyhelminthes Curimatidae monopisthocotylean parasites Neotropical Region Stevardiidae

Abstract

During a study on the helminth fauna of fishes from the middle Munim River Basin, State of Maranhão, northeastern Brazil, specimens of Monopisthocotyla were found. Two new species of Diaphorocleidus from the gills of Knodus guajajara, a fish species endemic to the Maranhão coastal river basins, belonging to the Stevardiidae and a new species of Urocleidoides found parasitizing Steindachnerina notonota, a curimatid fish distributed along coastal river systems of northeastern Brazil are described. Additionally, Curvianchoratus hexacleidus is redescribed from S. notonota, a new host record. These findings highlight the remarkable but still underexplored parasitic diversity of the state of Maranhão, underscoring its significance for taxonomic research and for advancing the knowledge of monopisthocotyleans.

 

References

  1. Abdallah, V.D., Azevedo, R.K. & Silva, R.J. (2015) First record of Palombitrema triangulum (Suriano, 1981) Suriano, 1997 (Monogenea: Dactylogyridae) from freshwater fishes in Brazil. Brazilian Journal of Biology, 75, 229–233. https://doi.org/10.1590/1519-6984.12913
  2. Aguiar, R.G., Guimarães, E.C., Brito, P.S., Santos, J.P., Katz, A.M., Dias, L.J.B.S., Carvalho-Costa, L.F. & Ottoni, F.P. (2022) A new species of Knodus (Characiformes: Characidae), with deep genetic divergence, from the Mearim river basins, Northeastern Brazil, and evidence for hidden diversity in adjacent river basins. Neotropical Ichthyology, 20 (2), e210173. https://doi.org/10.1590/1982-0224-2021-0173
  3. Auricchio, P. & Salomão, M.G. (2002) Técnicas de coleta e preparação de vertebrados para fins científicos e didáticos. Instituto Pau Brasil de História Natural, Arujá, São Paulo, 350 pp.
  4. Azevedo-Santos, V.M. & Ottoni, F.P. (2025) Conserving the type locality hotspots. BioScience, 75 (8), 609–611. https://doi.org/10.1093/biosci/biaf024
  5. Bezerra, C.A.M., Freitas, A.J.F., Viana, D.C., Cohen, S.C. & Justo, M.C.N. (2023) A new species of Urocleidoides (Monogenoidea: Dactylogyridae) parasite of Psectrogaster amazonica (Characiformes: Curimatidae) and Caenotropus labyrinthicus (Characiformes: Chilodontidae) from Tocantins River, Maranhão State, Brazil with checklist of the genus. Neotropical Helminthology, 17 (2), 101–116. https://doi.org/10.24039/rnh20231721591
  6. Boeger, W.A. & Vianna, R.T. (2006) Monogeneoidea. In: Adis, J., Arias, J.R., Rueda-Delgado, G. & Wantzen, K.M. (Eds.), Aquatic Biodiversity in Latin America. Vol. 1. Amazon Fish Parasites. 2nd ed. Pensoft Publishers, Sofia, pp. 42–116.
  7. Braga, M.O.P., Razzolini, E. & Boeger, W.A. (2015) Drivers of parasite sharing among Neotropical freshwater fishes. Journal of Animal Ecology, 84, 487–497. https://doi.org/10.1111/1365-2656.12298
  8. Ebert, M., Osaki-Pereira, M.M., Pérez-Ponce de León, G. & Silva, R.J. (2024) A new species of Urocleidoides Mizelle & Price, 1964 from the gills of Schizodon nasutus Kner, 1858 (Characiformes, Anostomidae) in southeastern Brazil. Journal of Helminthology, 98 (e9), 1–8. https://doi.org/10.1017/S0022149X23000962
  9. Freitas, A.J.B., Bezerra, C.A.M., Meneses, Y.C., Justo, M.C.N., Viana, D.C. & Cohen, S.C. (2021) Three new species of Urocleidoides (Monogenoidea: Dactylogyridae) parasitizing characiforms (Actinopterygii: Characiformes) in Tocantins River, states of Tocantins and Maranhão, and new record for U. triangulus in Guandu River, state of Rio de Janeiro, Brazil. Zoologia, 38, e65001. https://doi.org/10.3897/zoologia.38.e65001
  10. Fricke, R., Eschmeyer, W.N. & Van der Laan, R. (Eds.) (2025) Eschmeyer's Catalog of Fishes: genera, species, references. Electronic version. Available from: http://researcharchive.calacademy.org/research/ichthyology/catalog/fishcatmain.asp (accessed 7 July 2025)
  11. Fricke, R., Eschmeyer, W.N. & Fong, J.D. (2025) Species by family / subfamily. Available from: http://researcharchive.calacademy.org/research/ichthyology/catalog/SpeciesByFamily.asp (accessed 5 November 2025)
  12. Froese, R. & Pauly, D. (Eds.) (2025) FishBase. Electronic publication. Available from: http://www.fishbase.org (accessed 7 July 2025)
  13. Hanek, G., Molnar, K. & Fernando, C.H. (1974) Three new genera of Dactylogyridae (Monogenea) from freshwater fishes of Trinidad. The Journal of Parasitology, 60 (6), 911–913. https://doi.org/10.2307/3278510
  14. Humason, G.L. (1979) Animal tissue techniques. 4ª Edition. WH Freeman and Company, San Francisco, California, 468 pp.
  15. ICZN (2012) International Commission on Zoological Nomenclature: Amendment of articles 8, 9, 10, 21 and 78 of the International Code of Zoological Nomenclature to expand and refine methods of publication. Bulletin of Zoological Nomenclature, 69, 161–169. https://doi.org/10.21805/bzn.v69i3.a8.161
  16. Jogunoori, W., Kritsky, D.C. & Venkatanarasaiah, J. (2004) Neotropical Monogenoidea. 46. Three new species from the gills of introduced aquarium fishes in India, the proposal of Heterotylus n. g. and Diaphorocleidus n. g., and the reassignment of some previously described species of Urocleidoides Mizelle & Price, 1964 (Polyonchoinea: Dactylogyridae). Systematic Parasitology, 58, 115–124. https://doi.org/10.1023/B:SYPA.0000029422.16712.9a
  17. Koerber, S., Guimarães, E.C., Brito, P.S., Bragança, P.H.N. & Ottoni, F.P. (2022) Checklist of the freshwater fishes of Maranhão, Brazil (CLOFFBR-MA). Ichthyological Contributions of Peces Criollos, 79, 1–94.
  18. Malabarba, M.C. & Malabarba, L.R. (2010) Biogeography of Characiformes: an evaluation of the available information of fossil and extant taxa. In: Nelson, J.S., Schultze, H-P. & Wilson, M.V.H. (Eds.), Origin and Phylogenetic Interrelationships of Teleosts. Pfeil, München, pp. 317–336.
  19. Malabarba, M.C.L.S. & Malabarba, L.R. (2014) Filogenia e Classificação dos peixes Neotropicais. In: Baldisserotto, B., Cyrino, J.E.P. & Urbinati, E.C. (Eds.), Biologia e fisiologia de peixes Neotropicais de água doce. FUNEP, UNESP, Jaboticabal, São Paulo pp. 51–62.
  20. Melo, B.F., Ota, R.P., Benine, R.C., Carvalho, F.R., Lima, F.C.T., Mattox, G.M.T., Souza, C.S., Faria, T.C., Reia, Roxo, F.F., Valdez-Moreno, M., Perto, T.J. & Oliveira, C. (2024) Phylogenomics of Characidae, a hyper-diverse Neotropical freshwater fish lineage, with a phylogenetic classification including four families (Teleostei: Characiformes). Zoological Journal of the Linnean Society, 202 (1), zlae101. https://doi.org/10.1093/zoolinnean/zlae101
  21. Mendoza-Franco, E.F. & Reina, R.G. (2008) Five New Species of Urocleidoides (Monogenoidea) (Mizelle and Price 1964) Kritsky, Thatcher, and Boeger, 1986, Parasitizing the Gills of Panamanian Freshwater Fishes. Journal of Parasitology, 94 (4), 793–802. https://doi.org/10.1645/ge-1438.1
  22. Mizelle, J.D. & Price, C.E. (1963) Additional haptoral hooks in the genus Dactylogyrus. The Journal of Parasitology, 19, 785–806. https://doi.org/10.2307/3275746
  23. Mizelle, J.D. & Price, C.E. (1964) Studies on monogenetic trematodes. XXVII. Dactylogyrid species with the proposal of Urocleidoides gen. n. The Journal of Parasitology, 50 (4), 579–584. https://doi.org/10.2307/3275625
  24. Molnar, K., Hanek, G. & Fernando, C.H. (1974) Ancyrocephalids (Monogenea) from Freshwater Fishes of Trinidad. The Journal of Parasitology, 60 (6), 914–920. https://doi.org/10.2307/3278511
  25. Morey, G.A.M., Viana, D.C., Chota, H.R. & Chero, J.D. (2025) Three new species of Jainus (Monogenoidea: Dactylogyridae) from the gills of Triportheus angulatus (Characiformes: Triportheidae) collected in the Peruvian Amazonia. Systematic Parasitology, 102 (1), 1. https://doi.org/10.1007/s11230-024-10200-0
  26. Myers, N., Mittermeier, R.A., Mittermeier, C.G., Fonseca, G.A.B. & Kent, J. (2000) Biodiversity hotspots for conservation priorities. Nature, 403, 853–858. https://doi.org/10.1038/35002501
  27. Oliveira, C., Avelino, G.S., Abe, K.T., Mariguela, T.C., Benine, R.C., Ortí, G., Vari, R.P. & Castro, R.M.C. (2011) Phylogenetic relationships within the speciose family Characidae (Teleostei: Ostariophysi: Characiformes) based on multilocus analysis and extensive ingroup sampling. BMC Evolutionary Biology, 11 (275), 1–25. https://doi.org/10.1186/1471-2148-11-275
  28. Oliveira, C. (2025) Biodiversity, Systematics, and Taxonomy of Ostariophysi (Osteichthyes, Actinopterygii): What we know today after three decades of integration of morphological and molecular data. Taxonomy, 5 (2), 33. https://doi.org/10.3390/taxonomy5020033
  29. Oliveira, G.S., Silva, R.J., Vieira, F.E.G. & Acosta, A.A. (2021) Urocleidoides spp. (Monogenea: Dactylogyridae) from the gills of Parodon nasus (Characiformes: Parodontidae) from a Brazilian stream with descriptions of two new species. Zootaxa, 5081 (4), 535–550. https://doi.org/10.11646/zootaxa.5081.4.5
  30. Oliveira, M.S.B., Santos-Neto, J.F., Tavares-Dias, M. & Domingues, M.V. (2020) New species of Urocleidoides (Monogenoidea: Dactylogyridae) from the gills of two species of Anostomidae from the Brazilian Amazon. Brazilian Journal of Veterinary Parasitology, 29 (3), e007820. https://doi.org/10.1590/S1984-29612020039
  31. Osaki–Pereira, M.M., Yamada, P.d.F., Ebert, M.B. & Silva, R.J. (2025) Phylogenetic insights into Annulotrematoides (Kritsky & Boeger, 1995) and Urocleidoides (Mizelle & Price, 1964) (Monopisthocotyla: Dactylogyridae) species parasitizing Cyphocharax modestus (Fernández–Yépez) (Characiformes: Curimatidae) from southeastern Brazil. Systematic Parasitology, 102, 47. https://doi.org/10.1007/s11230-025-10239-7
  32. Reis, R.E., Albert, J.S., Di Dario, F., Mincarone, M.M. & Rocha, L.A. (2016) Fish biodiversity and conservation in South America. Journal of Fish Biology, 89 (1), 12–47. https://doi.org/10.1111/jfb.13016
  33. Rossin, M.A. & Timi, J.T. (2016) Dactylogyrid monogeneans parasitising Cyphocharax voga (Hensel) (Teleostei: Curimatidae) from the Pampas region, Argentina: new and previously described species. Systematic Parasitology, 93, 701–714. https://doi.org/10.1007/s11230-016-9654-8
  34. Santos Neto, J.F., Soares, G.B. & Domingues, M.V. (2025) Taxonomy and molecular phylogeny of Urocleidoides spp. (Monopisthocotyla: Dactylogyridae): Four new species and cophylogenetic patterns in a clade of species parasitizing Characiformes hosts. Journal of Helminthology, 99 (e97), 1–19. https://doi.org/10.1017/S0022149X25100643
  35. Silva, M.L., Cohen, S.C., Ottoni, F.P., Viana, D.C., Meneses, Y.C.D. & Justo, M.C.N. (2024) Two new species of Diaphorocleidus and new data on D. affinis (Monogenoidea: Dactylogyridae) parasitizing Bryconops cf. affinis (Characiformes: Iguanodectidae) from the Munim River basin, State of Maranhão, northeastern Brazil. Zootaxa, 5403 (1), 91–103. https://doi.org/10.11646/zootaxa.5403.1.6
  36. Silva, M.L., Ottoni, F.P., Viana, D.C., Saraiva, D.J., Justo, M.C.N. & Cohen, S.C. (2025) Sciadicleithrum spp. (Dactylogyridae, Monopisthocotyla) parasitizing Saxatilia brasiliensis (Cichlidae, Cichliformes) from the Munim River Basin, northeastern of Brazil, with a description of a new species. Zoosystematics and Evolution, 101 (4), 2161–2169. https://doi.org/10.3897/zse.101.147382
  37. Suriano, D.M. (1980) Notodiplocerus singularis gen. et sp. Nov (Monogenea, Ancyrocephalinae) parasita de las branquias de Pseudocurimata gilberti (Pisces: Tetragonopteridae) de La Laguna de Chascomus, Republica Argentina. Neotropica, 26, 131–143.
  38. Suriano, D.M. (1981) Androspira gen.nov. (Monogenea, Ancyrocephalinae) parasita branquial de Pseucurimata gilberti (Quoy and Gaimard, 1824) Fernandez-Yepez, 1948 (Pisces: Tetragonopteridae) de la Laguna de Chascomus Republica Argentina. Neotropica, 27, 67–78.
  39. Suriano, D.M. (1997) The genus Urocleidoides Mizelle & Price, 1964 (Monogenea: Ancyrocephalidae) parasitizing characoidei fishes in Argentina. Physis, 53, 1–6.
  40. Tagliacollo, V.A., Tan, M., Reis, R.E., Gaia, R., Carrijo, V., Ranuzi, M., Craig, J.M. & Albert, J.S. (2024) Time-calibrated phylogeny of neotropical freshwater fishes. Frontier Bioinformatic, 4, 1433995. https://doi.org/10.3389/fbinf.2024.1433995
  41. Vieira, L.O., Campos, D.S., Oliveira, R.F., South, J., Coelho, M.S.P., Paiva, M.J.S., Bragança, P.H.N., Guimarães, E.C., Katz, A.M., Brito, P.S., Santos, J.P. & Ottoni, F.P. (2023) Checklist of the fish fauna of the Munim River Basin, Maranhão, north-eastern Brazil. Biodiversity Data Journal, 11 (2), e98632. https://doi.org/10.3897/BDJ.11.e98632
  42. Vieira, D.H.M.D., Caramello, L.E., Abadallah, V.D., Silva, R.J. da & Azevedo, R.K. de. (2013) Community ecology of metazoan parasites of the sairú Cyphocharax nagelii from the Peixe River. Revista Brasileira de Parasitologia Veterinaria, 22 (4), 611–615. https://doi.org/10.1590/S1984-29612013000400027
  43. Wayne, S.R. (2010) National Institutes of Health: Imagel. Available from: https://imagej.nih.gov/ij/download.html (accessed 5 April 2025)
  44. Yamada, P.O.F., Osaki-Pereira, M.M., Acosta, A.A., Ebert, M.B. & Silva, R.J. (2024) Two New Species of Urocleidoides (Monopisthocotyla: Dactylogyridae) Parasitizing the Gills of Cyphocharax modestus (Characiformes: Curimatidae) Supported by Morphological and Molecular Data. Diversity, 16 (12), 716. https://doi.org/10.3390/d16120716
  45. Yamada, P.O.F., Diniz, M.F.B.G., Sousa, W.B.B., Yamada, F.H. & Tavares-Dias, M. (2024a) A New Species of Anacanthorus (Dactylogyridae, Anacanthorinae) Parasitizing Gills of Hoplias aff. malabaricus (Bloch, 1794) (Characiformes, Erythrinidae) from the Caatinga Domain. Acta Parasitologica. https://doi.org/10.1007/s11686-024-00864-5
  46. Yamada, P.O.F., Osaki-Pereira, M.M., Acosta, A.A., Ebert, M.B. & Silva, R.J. (2024b) Two New Species of Urocleidoides (Monopisthocotyla: Dactylogyridae) Parasitizing the Gills of Cyphocharax modestus (Characiformes: Curimatidae) Supported by Morphological and Molecular Data. Diversity, 16, 716. https://doi.org/10.3390/d16120716
  47. Yamada, P.O.F., Sousa, W.B.B., Ebert, M.B., Diniz, M.F.B.G., Tavares-Dias, M., 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, 467. https://doi.org/10.3390/pathogens14050467
  48. Zago, A.C., Franceschini, L., Abdallah, V.D., Muller, I., Azevedo, R.K. & Silva, R.J. (2021) Morphological and molecular data of new species of Characithecium and Diaphorocleidus (Monogenea: Dactylogyridae) from Neotropical characid fishes. Parasitology International, 84, 102406. https://doi.org/10.1016/j.parint.2021.102406
  49. Zago, A.C., Yamada, F.H., Yamada, P.O.F., Franceschini, L., Bongiovani, M.F. & Silva, R.J. (2020) Seven new species of Urocleidoides (Monogenea: Dactylogyridae) from Brazilian fishes supported by morphological and molecular data. Parasitology Research, 119, 3255–3283. https://doi.org/10.1007/s00436-020-06831-z

How to Cite

Justo, M.C.N., Silva, M.L., Ottoni, F.P., Mendonça, G.C.D.F., Nigris, G.O.D. & Cohen, S.C. (2025) New species of Diaphorocleidus and Urocleidoides with a redescription of Curvianchoratus hexacleidus (Monopisthocotyla: Dactylogyridae) parasitizing characiform fishes from the Munim River Basin, northeastern Brazil. Zootaxa, 5729 (1), 135–150. https://doi.org/10.11646/zootaxa.5729.1.5