Gymnocranius indicus , a new large-eye seabream from the Indian Ocean - Archive ouverte HAL
Article Dans Une Revue Journal of the Marine Biological Association of the UK Année : 2024

Gymnocranius indicus , a new large-eye seabream from the Indian Ocean

Résumé

Gymnocranius indicus sp. nov. is described as a new species of the fish subfamily Monotaxinae (Sparoidea: Lethrinidae), a group of commercially important species distributed throughout the Indo-West Pacific, on the basis of 16 specimens collected from the Indian Ocean. The new species shares the following characters with its western Pacific sibling, the eyebrowed large-eye seabream, G. superciliosus : elongate body, distinctive and conspicuous dark patch above the eye, prominent forehead, moderately forked caudal fin, its lobes slightly convex inside, flank silvery, and reddish-to-red dorsal, pectoral, anal and caudal fins. However, principal component analysis based on seven morphological variables distinguished most specimens from the Indian Ocean from G. superciliosus . The most influential variable in the analysis was the eye diameter, significantly larger in the new species than in G. superciliosus . All specimens of the new species that were examined also lacked blue ornamentation on the snout and cheek. At the mitochondrial cytochrome oxidase subunit-I locus, the mean genetic p- distance between the two species was 0.039. With Gymnocranius indicus sp. nov., the genus now includes 12 valid nominal species; three additional species remain undescribed.
Fichier principal
Vignette du fichier
G_indicus_p._haL_20240527_compressed.pdf (810.46 Ko) Télécharger le fichier
Origine Fichiers produits par l'(les) auteur(s)

Dates et versions

hal-04589586 , version 1 (27-05-2024)

Identifiants

Citer

Wei-Jen Chen, Ryohei Miki, John Nevill, Philippe Borsa. Gymnocranius indicus , a new large-eye seabream from the Indian Ocean. Journal of the Marine Biological Association of the UK, 2024, 104, pp.e38. ⟨10.1017/S0025315424000274⟩. ⟨hal-04589586⟩
6 Consultations
13 Téléchargements

Altmetric

Partager

More