Use este identificador para citar ou linkar para este item: https://repositorio.inpa.gov.br/handle/1/19069
Título: Largest of all electric-fish snouts: Hypermorphic facial growth in male Apteronotus hasemani and the identity of Apteronotus anas (Gymnotiformes: Apteronotidae)
Autor: Fernandes, Cristina Cox
Lundberg, John G.
Riginos, Cynthia
Palavras-chave: Dimorphism
Fish
Taxonomy
Amazonas
Manaus
Anas
Apteronotidae
Apteronotus
Apteronotus Anas
Apteronotus Hasemani
Apteronotus Hasemani
Electric Fish
Gymnotiformes
Pisces
Vertebrata
Data do documento: 2002
Revista: Copeia
É parte de: Volume 1, Pags. 52-61
Abstract: South American gymnotiform electric fishes exhibit sexual dimorphism of shape within species, and divergence of shape among species. Recent collecting in floating vegetation mats near Manaus, Brazil, yielded a remarkable association of female and "normal" males of Apteronotus hasemani plus a series of sexually mature male specimens with greatly hypertrophied snouts and gapes. We argue that these fish represent a single species based on shared distinctive features of morphology and coloration, continuous variation of morphometric characters including allometric and dimorphic facial growth in males, ecological and possible reproductive association, and identity in 16S mt rDNA sequences. The degree of dimorphism shown by the large males greatly exceeds previously known limits of intraspecific variation for A. hasemani. The males with the most extreme snouts and gapes closely approach the holotype of Apteronolus anas that is also a mature male. We conclude that A. anas is based on a large male of A. hasemani; the older-named A. hasemani is the senior synonym.
DOI: 10.1643/0045-8511(2002)002[0052:LOAEFS]2.0.CO;2
Aparece nas coleções:Artigos

Arquivos associados a este item:
Não existem arquivos associados a este item.


Os itens no repositório estão protegidos por copyright, com todos os direitos reservados, salvo quando é indicado o contrário.