Two new species of Acanthocotyle Monticelli, 1888 (Monogenea: Acanthocotylidae), parasites of two deep-sea skates (Elasmobranchii: Rajiformes) in the South-East Pacific
Abstract Background Parasites of deep-sea fishes from the South-East Pacific (SPO) are poorly known. Of c.1030 species of fish found in this area, 100–150 inhabit the deep-sea (deeper than 200 m). Only six articles concerning metazoan parasites of fish from deep-waters of SOP are known, and nine mon...
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| Format: | Article |
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BMC
2019-10-01
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| Series: | Parasites & Vectors |
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| Online Access: | http://link.springer.com/article/10.1186/s13071-019-3756-5 |
| _version_ | 1831726456103763968 |
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| author | Luis A. Ñacari Fabiola A. Sepúlveda Ruben Escribano Marcelo E. Oliva |
| author_facet | Luis A. Ñacari Fabiola A. Sepúlveda Ruben Escribano Marcelo E. Oliva |
| author_sort | Luis A. Ñacari |
| collection | DOAJ |
| description | Abstract Background Parasites of deep-sea fishes from the South-East Pacific (SPO) are poorly known. Of c.1030 species of fish found in this area, 100–150 inhabit the deep-sea (deeper than 200 m). Only six articles concerning metazoan parasites of fish from deep-waters of SOP are known, and nine monogenean species have been reported. Currently, ten species are known in Acanthocotyle Monticelli, 1888 (Monogenea) and when stated, all of them are found in shallow waters (10–100 m). Acanthocotyle gurgesiella Ñacari, Sepulveda, Escribano & Oliva, 2018 is the only known species parasitizing deep-sea skates (350–450 m) in the SPO. The aim of this study was the description of two new species of Acanthocotyle from two Rajiformes. Methods In September 2017, we examined specimens of two species of deep-sea skates (Rajiformes), Amblyraja frerichsi (Krefft) and Bathyraja peruana McEachran & Myyake, caught at c.1500 m depth off Tocopilla, northern Chile, as a by-catch of the Patagonian tooth fish Dissostichus eleginoides Smitt fishery. Specimens of Acanthocotyle were collected from the skin of the skates. Morphometric (including multivariate analysis of proportional measurements, standardized by total length), morphological and molecular analyses (LSU rRNA and cox1 genes) were performed in order to identify the collected specimens. Results The three approaches used in this study strongly suggest the presence of two new species in the genus Acanthocotyle: Acanthocotyle imo n. sp. and Acanthocotyle atacamensis n. sp. parasitizing the skin of the thickbody skate Amblyraja frerichsi and the Peruvian skate Bathyraja peruana, respectively. The main morphological differences from the closely related species Acanthocotyle verrilli Goto, 1899 include the number of radial rows of sclerites, the non-discrete vitelline follicles and the number of testes. Conclusions The two species of monogeneans described here are the only recorded parasites from their respective host species in the SPO. Assessing host specificity for members of Acanthocotyle requires clarifying the systematics of Rajiformes. |
| first_indexed | 2024-12-21T06:09:16Z |
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| id | doaj.art-791cab9bcdc349d9a977f370b3c6c06a |
| institution | Directory Open Access Journal |
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| language | English |
| last_indexed | 2024-12-21T06:09:16Z |
| publishDate | 2019-10-01 |
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| series | Parasites & Vectors |
| spelling | doaj.art-791cab9bcdc349d9a977f370b3c6c06a2022-12-21T19:13:34ZengBMCParasites & Vectors1756-33052019-10-0112111310.1186/s13071-019-3756-5Two new species of Acanthocotyle Monticelli, 1888 (Monogenea: Acanthocotylidae), parasites of two deep-sea skates (Elasmobranchii: Rajiformes) in the South-East PacificLuis A. Ñacari0Fabiola A. Sepúlveda1Ruben Escribano2Marcelo E. Oliva3Programa Doctorado Ciencias Aplicadas, Universidad de AntofagastaInstituto Ciencias Naturales Alexander von Humboldt, Universidad de AntofagastaInstituto Milenio de Oceanografía, Universidad de ConcepciónInstituto Milenio de Oceanografía, Universidad de ConcepciónAbstract Background Parasites of deep-sea fishes from the South-East Pacific (SPO) are poorly known. Of c.1030 species of fish found in this area, 100–150 inhabit the deep-sea (deeper than 200 m). Only six articles concerning metazoan parasites of fish from deep-waters of SOP are known, and nine monogenean species have been reported. Currently, ten species are known in Acanthocotyle Monticelli, 1888 (Monogenea) and when stated, all of them are found in shallow waters (10–100 m). Acanthocotyle gurgesiella Ñacari, Sepulveda, Escribano & Oliva, 2018 is the only known species parasitizing deep-sea skates (350–450 m) in the SPO. The aim of this study was the description of two new species of Acanthocotyle from two Rajiformes. Methods In September 2017, we examined specimens of two species of deep-sea skates (Rajiformes), Amblyraja frerichsi (Krefft) and Bathyraja peruana McEachran & Myyake, caught at c.1500 m depth off Tocopilla, northern Chile, as a by-catch of the Patagonian tooth fish Dissostichus eleginoides Smitt fishery. Specimens of Acanthocotyle were collected from the skin of the skates. Morphometric (including multivariate analysis of proportional measurements, standardized by total length), morphological and molecular analyses (LSU rRNA and cox1 genes) were performed in order to identify the collected specimens. Results The three approaches used in this study strongly suggest the presence of two new species in the genus Acanthocotyle: Acanthocotyle imo n. sp. and Acanthocotyle atacamensis n. sp. parasitizing the skin of the thickbody skate Amblyraja frerichsi and the Peruvian skate Bathyraja peruana, respectively. The main morphological differences from the closely related species Acanthocotyle verrilli Goto, 1899 include the number of radial rows of sclerites, the non-discrete vitelline follicles and the number of testes. Conclusions The two species of monogeneans described here are the only recorded parasites from their respective host species in the SPO. Assessing host specificity for members of Acanthocotyle requires clarifying the systematics of Rajiformes.http://link.springer.com/article/10.1186/s13071-019-3756-5MonogeneaAcanthocotyle imo n. sp.Acanthocotyle atacamensis n. sp.Amblyraja frerichsiBathyraja peruanaSouth-East Pacific Ocean |
| spellingShingle | Luis A. Ñacari Fabiola A. Sepúlveda Ruben Escribano Marcelo E. Oliva Two new species of Acanthocotyle Monticelli, 1888 (Monogenea: Acanthocotylidae), parasites of two deep-sea skates (Elasmobranchii: Rajiformes) in the South-East Pacific Parasites & Vectors Monogenea Acanthocotyle imo n. sp. Acanthocotyle atacamensis n. sp. Amblyraja frerichsi Bathyraja peruana South-East Pacific Ocean |
| title | Two new species of Acanthocotyle Monticelli, 1888 (Monogenea: Acanthocotylidae), parasites of two deep-sea skates (Elasmobranchii: Rajiformes) in the South-East Pacific |
| title_full | Two new species of Acanthocotyle Monticelli, 1888 (Monogenea: Acanthocotylidae), parasites of two deep-sea skates (Elasmobranchii: Rajiformes) in the South-East Pacific |
| title_fullStr | Two new species of Acanthocotyle Monticelli, 1888 (Monogenea: Acanthocotylidae), parasites of two deep-sea skates (Elasmobranchii: Rajiformes) in the South-East Pacific |
| title_full_unstemmed | Two new species of Acanthocotyle Monticelli, 1888 (Monogenea: Acanthocotylidae), parasites of two deep-sea skates (Elasmobranchii: Rajiformes) in the South-East Pacific |
| title_short | Two new species of Acanthocotyle Monticelli, 1888 (Monogenea: Acanthocotylidae), parasites of two deep-sea skates (Elasmobranchii: Rajiformes) in the South-East Pacific |
| title_sort | two new species of acanthocotyle monticelli 1888 monogenea acanthocotylidae parasites of two deep sea skates elasmobranchii rajiformes in the south east pacific |
| topic | Monogenea Acanthocotyle imo n. sp. Acanthocotyle atacamensis n. sp. Amblyraja frerichsi Bathyraja peruana South-East Pacific Ocean |
| url | http://link.springer.com/article/10.1186/s13071-019-3756-5 |
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