Morphology and molecular phylogenetic relationships of Barathronus multidens (Ophidiiformes: Bythitidae)

Evseenko S.A., Gordeeva N.V., Bolshakova Y.Yu., Kobyliansky S.H.

Date de parution: juin 2018
Volume: 42
Number: 2
Pagination: 137-141
Editeur: Société Française d'Ichtyologie
doi: 10.26028/cybium/2018-422-002
Résumé

Deep-water Barathronus multidens (Ophidiiformes: Bythitidae) was previously known from the two type specimens from off the coast of Florida and Morocco. In this paper, we characterize morphologically and molecularly a juvenile (45 mm SL) caught by a Sigsbee trawl at the Mid-Atlantic Ridge (16º50’N) between the surface and 3,227 m. DNA sequences of B. multidens are obtained for the first time. They are determined from the sequences of the mitochondrial genes ND4 and 16S, and the nuclear gene RAG 1. Within Bythitidae, the genera Barathronus and Sciadonus form a monophyletic clade. Sciadonus is nested within Barathronus with the B. multidens lineage being the earliest branching of the clade.

Mots-clés: Aphyonids - Barathronus multidens - Bythitidae - Deep-sea diversity - Mariana Trench - Mid-Atlantic Ridge - Molecular phylogeny
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