Monogeneans of the catfish Pimelodus blochii Valenciennes (Siluriformes: Pimelodidae) from the Brazilian Amazon, with a description of a new species of Ameloblastella Kritsky, Mendoza-Franco & Scholz, 2000 (Monogenea: Dactylogyridae)
- 88 Downloads
Ameloblastella amazonica n. sp. (Monogenea: Dactylogyridae) collected on the gills of Pimelodus blochii Valenciennes (Siluriformes: Pimelodidae) from Rivers Acre and Iaco, State of Acre (Brazil) is described. The new species differs from the congeners mainly by the morphology of the dorsal bar, i.e. slightly U-shaped bearing a posteriorly directed flap, arising from the anterior edge of its middle third. The most morphologically similar congeners, A. paranaensis (França, Isaac, Pavanelli & Takemoto, 2003) and A. satoi Monteiro, Kritsky & Brasil-Sato, 2010, resemble A. amazonica n. sp. regarding the general structure of the copulatory complex; however, besides other features, they also differ from the new species because their hooks are similar in size (vs hooks with three different sizes). In addition to the dorsal bar lacking a flap, A. amazonica n. sp. can be differentiated from all congeners based on the combination of the following features: size of hooks (one or two different sizes), shape of the dorsal bar (other than slightly U-shaped), anchor points largely passing the level of superficial root (vs not or slightly passing it), number of MCO rings (other than 3–4) and structure of the articulation between the MCO base and the accessory piece (other than thick, medium-sized, smooth and tubular). Demidospermus leptosynophallus Kritsky & Gutierrez, 1998 and Scleroductus yuncensi Jara & Cone, 1989 were also found infesting P. blochii, both representing new host and locality records.
The authors would like to thank Drs Marcelo Knoff and Daniela A. Lopes, Coleção Helmintológica do Instituto Oswaldo Cruz (CHIOC), for the loan of specimens and André Mota for preparing the line drawings. Thanks are also due to Dr Marcus Vinícius Domingues, Universidade Federal do Pará (Brazil), for the critical comments regarding some aspects of the study.
This study was financed in part by the Coordenação de Aperfeiçoamento de Pessoal de Nível Superior-Brasil (CAPES)-Finance code 001. FBP was supported by a Post-doctoral fellowship PNPD-CAPES (Programa Nacional de Pós-Doutorado-Coordenação de Aperfeiçoamento de Pessoal de Nível Superior-CAPES, Brazil). Marcos Tavares-Dias was granted (# 303013/2015-0) a Research Fellowship from the National Council for Scientific and Technological Development (CNPq, Brazil).
Compliance with ethical standards
Conflict of interest
The authors declare that they have no conflict of interest.
All procedures involving animals were permitted and were strictly according to the rules of the Sistema de Autorização e Informação em Biodiversidade (acronym SISBIO, No. 60899–1) and the Committee on Ethics of Animal Experiments of the Embrapa Amapá (Protocol No. 002- CEUA-CPAFAP).
- Aguiar, J. C., Maia, A. A. M., Silva, M. R. M., Ceccarelli, P. S., Domingues, M. V., & Adriano, E. A. (2017). An integrative taxonomic study of Pavanelliella spp. (Monogenoidea, Dactylogyridae) with the description of a new species from the nasal cavities of an Amazon pimelodid catfish. Parasitology International, 66, 777–788.CrossRefGoogle Scholar
- Boeger, W. A., & Vianna, R. T. (2006). Monogenoidea. In: Thatcher, V. E. (Ed.), Amazon fish parasites. Sofia: Pensoft Publishers, pp. 42–116.Google Scholar
- Cohen, S. C., & Kohn, A. (2008). New data on species of Demidospermus (Dactylogyridae: Monogenea) parasitizing fishes from the reservoir Itaipu hydroelectric power station, Parana State, Brazil, with new synonymies. Brazilian Journal of Veterinary Parasitology, 17, 167–170.Google Scholar
- Cohen, S. C., Kohn, A., & Justos, M. C. N. (2013). South American monogenoidea parasites of fishes, amphibians and reptiles. Rio de Janeiro: Oficina de Livros, 659 pp.Google Scholar
- França, J. G., Isaac, A., Pavanelli, G. C., & Takemoto, R. M. (2003). Dactylogyridae (Monogenea) from the gills of Iheringichthys labrosus (Osteichthyes: Pimelodidae) from the upper Paraná River floodplain, Brazil, with the proposal of Pseudovancleaveus n. g. Systematic Parasitology, 54, 25–31.CrossRefGoogle Scholar
- Franceschini, L., Zago, A. C., Mülle, M. I., Francisco, C. J., Takemoto, R. M., & Silva, R. J. (2018). Morphology and molecular characterization of Demidospermus spirophallus n. sp., D. prolixus n. sp. (Monogenea: Dactylogyridae) and a redescription of D. anus in siluriform catfish from Brazil. Journal of Helminthology, 91, 1–16.Google Scholar
- Froese R., & Pauly, D. (Eds) (2019). FishBase. World Wide Web electronic publication. http://www.fishbase.org, version 02/2019.
- Jara, C. A., & Cone, D. K. (1989). Scleroductus yuncensi gen. et sp. n. (Monogenea) from Pimelodella yuncensi (Siluriformes: Pimelodidae) in Peru. Proceedings of Helminthological Society of Washington, 56, 125–127.Google Scholar
- Kritsky, D. C., Boeger, W. A., Mendoza-Franco, E. F., & Vianna, R. T. (2013). Neotropical Monogenoidea. 57. Revision and phylogenetic position of Scleroductus Jara & Cone, 1989 (Gyrodactylidae), with descriptions of new species from the Guatemalan chulin Rhamdia guatemalensis (Günther) (Siluriformes: Heptapteridae) in Mexico and the barred sorubim Pseudoplatystoma fasciatum (Linnaeus) (Siluriformes: Pimelodidae) in Brazil. Systematic Parasitology, 84, 1–15.CrossRefGoogle Scholar
- Kritsky, D. C., & Gutiérrez, P. A. (1998). Neotropical Monogenoidea. 34. Species of Demidospermus (Dactylogyridae, Ancyrocephalinae) from the gills of pimelodids (Teleostei, Siluriformes) in Argentina. Proceedings of the Helminthological Society Washington, 65, 129–134.Google Scholar
- Kritsky, D. C., Mendoza-Franco, E. F., & Scholz, T. (2000). Neotropical Monogenoidea. 36. Dactylogyrids from the gills of Rhamdia guatemalensis (Siluriformes: Pimelodidae) from cenotes of the Yucatan Peninsula, Mexico with proposal of Ameloblastella gen. n. and Aphanoblastella gen. n. (Dactylogyridae, Ancyrocephalinae). Comparative Parasitology, 67, 76–84.Google Scholar
- Kritsky, D. C., & Thatcher, V. E. (1976). New monogenetic trematodes from freshwater fishes of western Colombia with the proposal of Anacanthoroides gen. n. (Dactylogyridae). Proceedings of the Helminthological Society of Washington, 43, 129–134.Google Scholar
- Kritsky, D. C., Thatcher, V. E., & Boeger, W. A. (1985). Neotropical Monogenea. 8. Revision of Urocleidoides (Dactylogyridae, Ancyrocephalinae). Proceedings of the Helminthological Society Washington, 53, 1–37.Google Scholar
- Mendoza-Franco, E. F., Mendoza-Palmero, C. A., & Scholz, T. (2016). New species of Ameloblastella Kritsky, Mendoza-Franco & Scholz, 2000 and Cosmetocleithrum Kritsky, Thatcher & Boeger, 1986 (Monogenea: Dactylogyridae) infecting the gills of catfishes (Siluriformes) from the Peruvian Amazonia. Systematic Parasitology, 93, 847–862.CrossRefGoogle Scholar
- Suriano, D. M., & Incorvaia, I. S. (1995). Ancyrocephalid (Monogenea) parasites from siluriform fishes from Paranean-Platean ichthyogeographical province in Argentina. Acta Parasitologica, 40, 113–124.Google Scholar