Etmopterus fusus

LAST, BURGESS & SÉRET, 2002



Classification: Elasmobranchii Squaliformes Etmopteridae

Reference of the original description
LAST, P.R. & BURGESS, G.H. & SÉRET, B. (2002)
Description of six new species of lantern-sharks of the genus Etmopterus (Squaloidea: Etmopteridae) from the Australasian region. Cybium, 26 (3): 202–223

Image of the original description
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Description :


Citation: Etmopterus fusus LAST, BURGESS & SÉRET, 2002: In: Database of modern sharks, rays and chimaeras, www.shark-references.com, World Wide Web electronic publication, Version 11/2018

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Etmopterus fusus LAST, BURGESS & SÉRET, 2002 (MNHN 2686, BPS-0498) © Samuel P. Iglésias, Muséum national d’Histoire naturelle, Département Milieux et Peuplements Aquatiques Chondrichthyans from the North-eastern Atlantic and the Mediterranean
Common names
eng Pygmy lanternshark

Short Description
Body firm fusiform, almost cylindrical. Dorsal and ventral surfaces dark; pectoral fin pale distally. Head relatively long (> 21% TL). Mouth moderate, subequal to eye length. Upper eyelid with pale naked patch. Caudal peduncle rather elongate, ca 2-2.6 times greatest horizontal length of D1 including spine about a 5th of TL. Upper teeth of mature males with 7 cusps. Denticles short, robust, arranged in regular rows. Posterior branch of flank marking truncate and merging ventrally with post-pelvic marking. Anterior part of caudal base marking very broad, enveloping ventral surface and extending onto flanks; presence of oval central caudal marking; upper caudal marking comma-shaped. Monospondylous centra 36-38 (Ref. 45056).

Distribution
Eastern Indian Ocean: northern Western Australia and possibly Java, Indonesia.

Biology
Distinct pairing with embrace [17086]. Found on the continental slope (Ref. 75154).

Size / Weight / Age
25.8 cm TL (male/unsexed; (Ref. 45056)); 29.3 cm TL (female)

Habitat
bathypelagic; marine; depth range 430 - 550 m (Ref. 45056)

Dentition
Diagnosis: Upper teeth of mature males with 7 cusps; Description: three series of functional teeth in upper jaw, one series in lower; teeth dissimilar in upper and lower jaws; upper teeth small, erect, multicuspid; seven cusps in males, central cusp very long, slender, next adjacent middle pairs two-thirds length of central cusp, lateral pair about half length of middle pair; five cusps in females, middle pair about two-thirds length of central cusp, lateral pair about half length of middle pair, lateral cusps relatively longer toward corner of mouth; teeth in lower jaw unicuspid, interlocking, blade-like, cusps low, very oblique, lower distal margin extremely short [1384];