A new species of Neoechinorhynchus (Eoacanthocephala: Neoechinorhynchidae) from Pachyurus bonariensis (Perciformes: Sciaenidae) from the Paraná River basin in Argentina, with comments on two other species of the genus

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Neoechinorhynchus (Hebesoma) colastinense sp. n. is described from the intestine of Pachyurus bonariensis a freshwater fish from Parana River basin. The new species is characterized by having a cylindrical trunk, elongated but swollen anteriorly; a spherical proboscis with a prominent apical organ;...

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Detalles Bibliográficos
Autores principales: Arredondo, N.J., Gil De Pertierra, A.A.
Formato: Artículo publishedVersion
Lenguaje:Inglés
Publicado: 2012
Materias:
Acanthocephala
Freshwater fishes
Hebesoma
Morphology
Neoechino
Rhynchus
South America
Taxonomy
Eoacanthocephala
Lycengraulis grossidens
Neoechinorhynchidae
Neoechinorhynchus
Neoechinorhynchus macronucleatus
Perciformes
Pimelodus
Pisces
Sciaenidae
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_0035418X_v119_n4_p425_Arredondo
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id paperaa:paper_0035418X_v119_n4_p425_Arredondo
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spelling paperaa:paper_0035418X_v119_n4_p425_Arredondo2023-06-12T16:45:36Z A new species of Neoechinorhynchus (Eoacanthocephala: Neoechinorhynchidae) from Pachyurus bonariensis (Perciformes: Sciaenidae) from the Paraná River basin in Argentina, with comments on two other species of the genus Rev. Suisse Zool. 2012;119(4):425-439 Arredondo, N.J. Gil De Pertierra, A.A. Acanthocephala Freshwater fishes Hebesoma Morphology Neoechino Rhynchus South America Taxonomy Eoacanthocephala Hebesoma Lycengraulis grossidens Neoechinorhynchidae Neoechinorhynchus Neoechinorhynchus macronucleatus Perciformes Pimelodus Pisces Rhynchus Sciaenidae Neoechinorhynchus (Hebesoma) colastinense sp. n. is described from the intestine of Pachyurus bonariensis a freshwater fish from Parana River basin. The new species is characterized by having a cylindrical trunk, elongated but swollen anteriorly; a spherical proboscis with a prominent apical organ; the anterior circle of hooks very large, alternating in 2 levels, separated from more posterior circles of hooks, but sometimes surpassing the hooks of the middle and posterior circles; a relatively long neck; the male reproductive system occupying 78-81% (79%) of the trunk length; the female reproductive system occupying 27-39% (32%) of the trunk length; and eggs elongated with polar prolongation of the fertilization membrane. Members of the species can be distinguished easily from the other species of South American Neoechinorhynchus Stiles & Hassall, 1905 because they are the only ones with characteristics of the subgenus Hebesoma. Additionally, two other species are recorded for the first time in Argentina: Neoechinorhynchus {Neoechinorhynchus) macro-nucleatus Machado Filho, 1954 from Lycengraulis grossidens and N. (N) pimelodi Brasil-Sato & Pavanelli, 1998 from several species of Pimelodus. The presence of an apical organ at the proboscis tip is recorded in the new species and N. (N.) macronucleatus. Studies using scanning electron microscopy revealed the presence of non-rimmed pores in the tegument throughout the trunk, neck and proboscis of all three species. A key to the South American species of Neoechinorhynchus is provided. Fil:Arredondo, N.J. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 2012 info:eu-repo/semantics/article info:ar-repo/semantics/artículo info:eu-repo/semantics/publishedVersion application/pdf eng info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_0035418X_v119_n4_p425_Arredondo
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
language Inglés
orig_language_str_mv eng
topic Acanthocephala
Freshwater fishes
Hebesoma
Morphology
Neoechino
Rhynchus
South America
Taxonomy
Eoacanthocephala
Hebesoma
Lycengraulis grossidens
Neoechinorhynchidae
Neoechinorhynchus
Neoechinorhynchus macronucleatus
Perciformes
Pimelodus
Pisces
Rhynchus
Sciaenidae
spellingShingle Acanthocephala
Freshwater fishes
Hebesoma
Morphology
Neoechino
Rhynchus
South America
Taxonomy
Eoacanthocephala
Hebesoma
Lycengraulis grossidens
Neoechinorhynchidae
Neoechinorhynchus
Neoechinorhynchus macronucleatus
Perciformes
Pimelodus
Pisces
Rhynchus
Sciaenidae
Arredondo, N.J.
Gil De Pertierra, A.A.
A new species of Neoechinorhynchus (Eoacanthocephala: Neoechinorhynchidae) from Pachyurus bonariensis (Perciformes: Sciaenidae) from the Paraná River basin in Argentina, with comments on two other species of the genus
topic_facet Acanthocephala
Freshwater fishes
Hebesoma
Morphology
Neoechino
Rhynchus
South America
Taxonomy
Eoacanthocephala
Hebesoma
Lycengraulis grossidens
Neoechinorhynchidae
Neoechinorhynchus
Neoechinorhynchus macronucleatus
Perciformes
Pimelodus
Pisces
Rhynchus
Sciaenidae
description Neoechinorhynchus (Hebesoma) colastinense sp. n. is described from the intestine of Pachyurus bonariensis a freshwater fish from Parana River basin. The new species is characterized by having a cylindrical trunk, elongated but swollen anteriorly; a spherical proboscis with a prominent apical organ; the anterior circle of hooks very large, alternating in 2 levels, separated from more posterior circles of hooks, but sometimes surpassing the hooks of the middle and posterior circles; a relatively long neck; the male reproductive system occupying 78-81% (79%) of the trunk length; the female reproductive system occupying 27-39% (32%) of the trunk length; and eggs elongated with polar prolongation of the fertilization membrane. Members of the species can be distinguished easily from the other species of South American Neoechinorhynchus Stiles & Hassall, 1905 because they are the only ones with characteristics of the subgenus Hebesoma. Additionally, two other species are recorded for the first time in Argentina: Neoechinorhynchus {Neoechinorhynchus) macro-nucleatus Machado Filho, 1954 from Lycengraulis grossidens and N. (N) pimelodi Brasil-Sato & Pavanelli, 1998 from several species of Pimelodus. The presence of an apical organ at the proboscis tip is recorded in the new species and N. (N.) macronucleatus. Studies using scanning electron microscopy revealed the presence of non-rimmed pores in the tegument throughout the trunk, neck and proboscis of all three species. A key to the South American species of Neoechinorhynchus is provided.
format Artículo
Artículo
publishedVersion
author Arredondo, N.J.
Gil De Pertierra, A.A.
author_facet Arredondo, N.J.
Gil De Pertierra, A.A.
author_sort Arredondo, N.J.
title A new species of Neoechinorhynchus (Eoacanthocephala: Neoechinorhynchidae) from Pachyurus bonariensis (Perciformes: Sciaenidae) from the Paraná River basin in Argentina, with comments on two other species of the genus
title_short A new species of Neoechinorhynchus (Eoacanthocephala: Neoechinorhynchidae) from Pachyurus bonariensis (Perciformes: Sciaenidae) from the Paraná River basin in Argentina, with comments on two other species of the genus
title_full A new species of Neoechinorhynchus (Eoacanthocephala: Neoechinorhynchidae) from Pachyurus bonariensis (Perciformes: Sciaenidae) from the Paraná River basin in Argentina, with comments on two other species of the genus
title_fullStr A new species of Neoechinorhynchus (Eoacanthocephala: Neoechinorhynchidae) from Pachyurus bonariensis (Perciformes: Sciaenidae) from the Paraná River basin in Argentina, with comments on two other species of the genus
title_full_unstemmed A new species of Neoechinorhynchus (Eoacanthocephala: Neoechinorhynchidae) from Pachyurus bonariensis (Perciformes: Sciaenidae) from the Paraná River basin in Argentina, with comments on two other species of the genus
title_sort new species of neoechinorhynchus (eoacanthocephala: neoechinorhynchidae) from pachyurus bonariensis (perciformes: sciaenidae) from the paraná river basin in argentina, with comments on two other species of the genus
publishDate 2012
url http://hdl.handle.net/20.500.12110/paper_0035418X_v119_n4_p425_Arredondo
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