Sexual dimorphisms of a rare bothid flounder, Grammatobothus pennatus (Bothidae, Pleuronectiformes)

Hoshino K., Mihara E., Amaoka K.

Date de parution: juin 2004
Volume: 28
Number: 3
Pagination: 243-246
Editeur: Société Française d’Ichtyologie

The sexual dimorphisms of a rare bothid flounder Grammatobothus pennatus are reported based on 25 specimens collected at New Caledonia, Chesterfield Islands and Northwestern Australia. In males, the ocular-side pectoral fin and the fourth dorsal-fin ray are longer than corresponding features in females, and two conspicuous cephalic blotches (one observed just anterior to and the other just anterodorsal to the upper eye) are evident in large males (versus faint or absent in females and smaller males). Differences between sexual dimorphisms observed in G. pennatus and G. polyophthalmus are discussed.

Mots-clés: Bothidae - Grammatobothus pennatus - PSW - Sexual dimorphisms
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