Gymnocranius oblongus (Teleostei: Lethrinidae), a new large-eye bream species from New Caledonia

Philippe Borsa (1) , Philippe Béarez (2) , Wei-Jen Chen (3)

1 CoReUS - Écosystémique des communautés récifales et de leurs usages dans le Pacifique insulaire
2 AASPE - Archéozoologie, archéobotanique : sociétés, pratiques et environnements
3 Oceanography Institute

Gymnocranius oblongus is described as a new species of the subfamily Monotaxinae (Sparoidaea : Lethrinidae), a group of commercially important fishes distributed throughout the Indo-West Pacific, from six specimens collected in New Caledonia. It is characterized by an oblong, fusiform body, slightly rounded snout, elongate tail with rounded tips and sub-horizontal, wavy blue lines or dashes on snout and cheeks. It is distinct from sympatric G. grandoculis by a more slender body which is also more symmetrical dorso-ventrally, and a more elongated caudal fin. Both mitochondrial-DNA and nuclear-DNA markers provide a genetic basis to the distinction of G. oblongus from G. grandoculis.

Mots clés: Monotaxinae; Taxonomy; Molecular genotyping; Reproductive isolation; Cryptic species

Domaines: Sciences de l'environnement

Philippe Borsa, Philippe Béarez, Wei-Jen Chen. Gymnocranius oblongus (Teleostei: Lethrinidae), a new large-eye bream species from New Caledonia. Comptes Rendus Biologies, 2010, 333, pp.241-247. ⟨10.1016/j.crvi.2009.12.015⟩. ⟨hal-00553677⟩