Apristurus melanoasper, a new species of deep-water catshark from the North Atlantic (Chondrichthyes: Carcharhiniformes: Scyliorhinidae)

Iglésias S.P., Nakaya K., Stehmann M.

Date de parution: décembre 2004
Volume: 28
Number: 4
Pagination: 345-356
Editeur: Société Française d’Ichtyologie
doi: https://doi.org/10.26028/cybium/2004-284-006
Résumé

A new deep-water catshark, Apristurus melanoasper n. sp., is described based on 53 specimens from the North Atlantic Ocean at 512 to 1520 m depth. This new species is characterized by having longer upper labial furrow than the lower one, high count of spiral intestine valves, a long abdomen, large dermal denticles and black coloration of the body. Among the species of the North Atlantic, this new species is most similar to A. laurussonii, but is distinguishable by combination of the following characters: an interorbital space which is 1.9 to 3.5 times eyes horizontal diameter, interspace between pectoral fin tip and pelvic fin which is 1.3 to 2.5 times pectoral fin width, large dermal denticles giving very rough texture to the skin, and black body colouration. A mitochondrial DNA sequence of 1500 nucleotides of the species presents 28 differences when aligned with that of A. laurussonii.

Mots-clés: AN - Apristurus melanoasper - mtDNA - New species - Scyliorhinidae
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