Etmopterus pseudosqualiolus

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
Image in copyright.

Types
Etmopterus pseudosqualiolus
Holotype: MNHN: 1997-3510; Paratype: CSIRO: H 5695-01 (old: MNHN 1997-3509); MNHN: 1997-3508; MNHN: 1997-3511; MNHN: 1997-3507 ;


Description :


Citation: Etmopterus pseudosqualiolus 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 pseudosqualiolus LAST, BURGESS & SÉRET, 2002 (MNHN 2005-2680, BPS-0453) © Samuel P. Iglésias, Muséum national d’Histoire naturelle, Département Milieux et Peuplements Aquatiques Chondrichthyans from the North-eastern Atlantic and the Mediterranean
Short Description
Body cigar-shaped; deep head conical with a short bulbous snout; preoral length 7.3-8.2 % TL. Eye almost round with a small opalescent lunate patch on upper eyelid margin. Pectoral fins small, rear tip about cornea diameter in front of D2 origin. Dorsal and ventral coloration dark; white conspicuous pineal blotch small and triangular. Caudal peduncle short (14.8-16.6% TL). Upper teeth of mature males usually with 7 cusps, others 9-11, in separated rows; central cusps greatly expanded, about 2 times longer than those adjacent. Denticles small, with a single erected, slightly curved cusps, arranged in irregular rows. Anterior branch of pelvic marking long and slender, posterior branch truncated. Precaudal marking with very long finger-like extensions reaching to central caudal fin. Monospondylous centra 46-47 (Ref. 45056).

Distribution
Western Pacific: Norfolk Ridge and Lord Howe Ridge off New Caledonia.

Biology
Distinct pairing with embrace [17086].

Size / Weight / Age
45.3 cm TL (male/unsexed; (Ref. 45056)); 41.4 cm TL (female)

Habitat
bathypelagic; marine; depth range 668 - 1170 m (Ref. 45056)

Dentition
Diagnosis: Upper teeth of mature males mostly with 7 cusps, some with 9-11 cusps, in separated rows; central cusps greatly expanded, about 2 times longer than those adjacent; denticles small, with a single erected, slightly curved cusp, arranged in irregular rows; Description: four series of functional teeth in upper jaw, one series in lower; teeth dissimilar in upper and lower jaws; upper teeth moderate, erect, multicuspid; with up to 11 (9-11) cusps in males, central cusps very long, slender, much more massive and about twice as long as those adjacent; lateral cusps parallel to the central cusp; 3 cusps in female MNHN 1997-3507, central cusps relatively larger near symphysis, 2-3 times longer than lateral pair; teeth in lower jaw unicuspid, interlocking, blade-like, cusps low, very oblique, lower distal margin very short [1384];