Artigo

Trichomycterus igobi, a new catfish species from the rio Iguaçu drainage: the largest head in Trichomycteridae (Siluriformes: Trichomycteridae).

A new species of Trichomycterus is described for the rio Iguaçu drainage in Southern Brazil. Trichomycterus igobi, new species, is readily distinguishable from all other species currently in the genus by its extremely large head (23.8-26.8 % SL), which is proportionally the largest head in any Tri...

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Autor principal: Wosiacki, Wolmar Benjamin
Outros Autores: Pinna, Mário de
Grau: Artigo
Idioma: English
Publicado em: Sociedade Brasileira de Ictiologia 2010
Assuntos:
Systematics
Taxonomy
Fishes
Trichomycterinae
Paraná - Brasil
Sistemática animal
Taxonomia animal
Acesso em linha: http://repositorio.museu-goeldi.br/handle/mgoeldi/178
id ir-mgoeldi-178
recordtype dspace
spelling ir-mgoeldi-1782019-07-17T17:51:32Z Trichomycterus igobi, a new catfish species from the rio Iguaçu drainage: the largest head in Trichomycteridae (Siluriformes: Trichomycteridae). Wosiacki, Wolmar Benjamin Pinna, Mário de Systematics Taxonomy Fishes Trichomycterinae Paraná - Brasil Sistemática animal Taxonomia animal A new species of Trichomycterus is described for the rio Iguaçu drainage in Southern Brazil. Trichomycterus igobi, new species, is readily distinguishable from all other species currently in the genus by its extremely large head (23.8-26.8 % SL), which is proportionally the largest head in any Trichomycteridae. That characteristic plus the relatively deep body result in a very short-bodied overall aspect, the most extremely such case in the genus Trichomycterus. Other diagnostic features that distinguish the new species from most or all of its congeners include a short caudal peduncle (15.4-19.7 % SL); an almost entirely cartilaginous second hypobranchial (with only vestigial ossification); a mesial expanded palatine ossification; a narrow cleithrum, falciform in shape; and the lack of a proximal posterior concavity on the third ceratobranchial. The new species seems to form a monophyletic group with T. stawiarski and other undescribed species (T. sp. C), also endemic to the rio Iguaçu. As putative synapomorphies, the three species share a rigid spine-like morphology of individual procurrent caudalfin rays, an extended area of dorsal caudal-fin procurrent rays, and numerous branchiostegal rays (ten or eleven). 2010-10-17T01:15:32Z 2010-10-17T01:15:32Z 2008 artigo WOSIACKI, Wolmar Benjamin; PINNA, Mário. Trichomycterus igobi, a new catfish species from the rio Iguaçu drainage: the largest head in Trichomycteridae (Siluriformes: Trichomycteridae). Neotropical Ichthyology, v. 6, n. 1, p.17-23, 2008. 1679-6225 http://repositorio.museu-goeldi.br/handle/mgoeldi/178 en application/pdf Sociedade Brasileira de Ictiologia
institution Repositório Institucional - Museu Paraense Emílio Goeldi
collection RepositorioEmilioGoeldi
language English
topic Systematics
Taxonomy
Fishes
Trichomycterinae
Paraná - Brasil
Sistemática animal
Taxonomia animal
spellingShingle Systematics
Taxonomy
Fishes
Trichomycterinae
Paraná - Brasil
Sistemática animal
Taxonomia animal
Wosiacki, Wolmar Benjamin
Trichomycterus igobi, a new catfish species from the rio Iguaçu drainage: the largest head in Trichomycteridae (Siluriformes: Trichomycteridae).
topic_facet Systematics
Taxonomy
Fishes
Trichomycterinae
Paraná - Brasil
Sistemática animal
Taxonomia animal
description A new species of Trichomycterus is described for the rio Iguaçu drainage in Southern Brazil. Trichomycterus igobi, new species, is readily distinguishable from all other species currently in the genus by its extremely large head (23.8-26.8 % SL), which is proportionally the largest head in any Trichomycteridae. That characteristic plus the relatively deep body result in a very short-bodied overall aspect, the most extremely such case in the genus Trichomycterus. Other diagnostic features that distinguish the new species from most or all of its congeners include a short caudal peduncle (15.4-19.7 % SL); an almost entirely cartilaginous second hypobranchial (with only vestigial ossification); a mesial expanded palatine ossification; a narrow cleithrum, falciform in shape; and the lack of a proximal posterior concavity on the third ceratobranchial. The new species seems to form a monophyletic group with T. stawiarski and other undescribed species (T. sp. C), also endemic to the rio Iguaçu. As putative synapomorphies, the three species share a rigid spine-like morphology of individual procurrent caudalfin rays, an extended area of dorsal caudal-fin procurrent rays, and numerous branchiostegal rays (ten or eleven).
format Artigo
author Wosiacki, Wolmar Benjamin
author2 Pinna, Mário de
author2Str Pinna, Mário de
title Trichomycterus igobi, a new catfish species from the rio Iguaçu drainage: the largest head in Trichomycteridae (Siluriformes: Trichomycteridae).
title_short Trichomycterus igobi, a new catfish species from the rio Iguaçu drainage: the largest head in Trichomycteridae (Siluriformes: Trichomycteridae).
title_full Trichomycterus igobi, a new catfish species from the rio Iguaçu drainage: the largest head in Trichomycteridae (Siluriformes: Trichomycteridae).
title_fullStr Trichomycterus igobi, a new catfish species from the rio Iguaçu drainage: the largest head in Trichomycteridae (Siluriformes: Trichomycteridae).
title_full_unstemmed Trichomycterus igobi, a new catfish species from the rio Iguaçu drainage: the largest head in Trichomycteridae (Siluriformes: Trichomycteridae).
title_sort trichomycterus igobi, a new catfish species from the rio iguaçu drainage: the largest head in trichomycteridae (siluriformes: trichomycteridae).
publisher Sociedade Brasileira de Ictiologia
publishDate 2010
url http://repositorio.museu-goeldi.br/handle/mgoeldi/178
_version_ 1787135963315568640
score 11.755432

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