Squalus crassispinus

LAST, EDMUNDS & YEARSLEY, 2007


Fatspine spurdog
Classification: Elasmobranchii Squaliformes Squalidae

Reference of the original description
LAST, P.R. & EDMUNDS, M. & YEARSLEY, G.K. (2007)
Part 2 - Squalus crassispinus sp nov., a new spurdog of the megalops-cubensis group from the eastern Indian Ocean. CSIRO Marine and Atmospheric Research Paper, 14: 11–22

Image of the original description

Lateral view of Squalus crassispinus sp. nov. holotype (CSIRO H 2547–06, female 580 mm TL). In: LAST, P.R. & EDMUNDS, M. & YEARSLEY, G.K. 2007 Part 2 - Squalus crassispinus sp nov., a new spurdog of the megalops-cubensis group from the eastern Indian Ocean. CSIRO Marine and Atmospheric Research Paper, 14: 11-22



Description :


Citation: Squalus crassispinus LAST, EDMUNDS & YEARSLEY, 2007: In: Database of modern sharks, rays and chimaeras, www.shark-references.com, World Wide Web electronic publication, Version 11/2018

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Ventral view of the head of Squalus crassispinus sp. nov. holotype (CSIRO H 2547–06, female 580 mm TL); Cusps of the flank denticles and lateral view of the dorsal fins (A. first dorsal fin, B. second dorsal fin) of Squalus crassispinus sp. nov. paratype (CSIRO H 1035–12, female 565 mm TL); In: LAST, P.R. & EDMUNDS, M. & YEARSLEY, G.K. 2007 Part 2 - Squalus crassispinus sp nov., a new spurdog of the megalops-cubensis group from the eastern Indian Ocean. CSIRO Marine and Atmospheric Research Paper, 14: 11-22
Common names
eng Fatspine spurdog

Short Description
This small species of the "quot;megalops-cubensis group"quot; is distinguished by the following characters: head width at mouth 9.9-11.3% TL; mouth width 2.1-2.4 times the horizontal prenarial length; direct pre-second dorsal length 3.7-4.2 times the pectoral-fin anterior margin, 2.6-2.8 times the dorsal caudal margin; preoral length 2.7-3.0 times the horizontal prenarial length, 8.3-9.2% TL; anterior nasal flap strongly bifurcate; first dorsal fin upright to raked; the exposed bases of dorsal-fin spines are very broad, 1.2-1.5% TL; both dorsal fins have short inner margins, first dorsal-fin height 1.3-1.7 times its inner margin length, second dorsal-fin height 1.1-1.3 times its inner margin length; pectoral-fin anterior margin 1.9-2.2 times its inner margin length; preventral caudal margin 2.4-4.6 times inner margin of pelvic fin; caudal fin pale with poorly demarcated, whitish posterior margin, caudal bar absent; flank denticles unicuspid; monospondylous centra 39-42 (mainly 40-41), precaudal centra 82-86, total centra 107-111 (mainly 109-110) [3327].

Distribution
Eastern Indian Ocean: northwestern Australia; probably occurs more widely in the eastern Indian Ocean. Source: www.gbif.org

Size / Weight / Age
47.6 cm TL (male/unsexed; [3327]); 58 cm TL (female)

Habitat
pelagic-oceanic; marine; depth range 187 - 262 m [3327]

Remarks
63433