Data/hora: 14/06/2024 02:53:24

Provedor de dados: 	83	
País: 	Brazil	
Título: 	Trichomycterus igobi, a new catfish species from the rio Iguaçu drainage: the largest head in Trichomycteridae (Siluriformes: Trichomycteridae)	
Autores: 	Wosiacki,Wolmar B.; Pinna,Mário de.	
Data: 	2008-03-01	
Ano: 	2008	
Palavras-chave: 	Systematics; Taxonomy; Fishes; Trichomycterinae; Paraná Basin.	
Resumo: 	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 caudal-fin rays, an extended area of dorsal caudal-fin procurrent rays, and numerous branchiostegal rays (ten or eleven).	
Tipo: 	Info:eu-repo/semantics/article	
Idioma: 	Inglês	
Identificador: 	http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252008000100003	
Editor: 	Sociedade Brasileira de Ictiologia	
Relação: 	10.1590/S1679-62252008000100003	
Formato: 	text/html	
Fonte: 	Neotropical Ichthyology  v.6 n.1 2008	
Fonte: 	info:eu-repo/semantics/openAccess