Centroscyllium excelsum

SHIRAI & NAKAYA, 1990


Highfin dogfish
Classification: Elasmobranchii Squaliformes Etmopteridae

Reference of the original description
SHIRAI, S. & NAKAYA, K. (1990)
A new squalid species of the genus Centroscyllium from the Emperor Seamount Chain. Japanese Journal of Ichthyology, 36 (4): 391–398

Image of the original description

Centroscyllium excelsum sp. nov., holotype (HUMZ 59470), male, 562 mm TL; in: SHIRAI, S. & NAKAYA, K. 1990 A new squalid species of the genus Centroscyllium from the Emperor Seamount Chain. Japanese Journal of Ichthyology, 36 (4): 391-398

Types
Centroscyllium excelsum
Holotype: HUMZ: 59470; Paratype: CAS: 64434; HUMZ: 69275; HUMZ: 69278; HUMZ: 69276; HUMZ: 69264; HUMZ: 69262; HUMZ: 69280; HUMZ: 69265; HUMZ: 68733; NSMT: P 30094; USNM: 300576;


Description :


Citation: Centroscyllium excelsum SHIRAI & NAKAYA, 1990: In: Database of modern sharks, rays and chimaeras, www.shark-references.com, World Wide Web electronic publication, Version 07/2018

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Common names
eng Highfin dogfish

Short Description
Original diagnosis of SHIRAI & NAKAYA, 1990 [3757]: An etmopterine species with lower jaw teeth similar to the upper in shape and arrangement; teeth with 2 to 4 lateral cusps; 1st dorsal fin very high, semicircular in shape, its height equal to or slightly larger than the base length; Ist dorsal spine prominently developed; 2nd dorsal spine originating well behind rear end of pelvic fin base, almost reaching apex of the fin; rear end of pectoral fin when laid back slightly anterior of Ist dorsal spine; inters pace between 2nd dorsal fin and upper lobe of caudal fin equal to distance from posterior rim of orbit to I st gill opening; dermal denticles conical with blunt tips, distributed sparsely, only on upper surface of head and trunk and proximal portion of both sides of pectoral fin; prefrontal wall (forming the ventral margin of prefrontal fontanelle) present with some foramina; subnasal stay and keelprocess of basal cranii present; genio-coracoideus arising directly from coracoid; 1st and 2nd interpharyngobranchiales only present; clasper with 3 basal cartilages and 3 spine-like terminal cartilages (claw, spur, and rhipidion).

Distribution
Northwest Pacific: Emperor Seamount chain. Source: www.gbif.org

Biology
Distinct pairing with embrace [17086].

Size / Weight / Age
63.6 cm TL (male/unsexed; [3757])

Habitat
bathydemersal; marine; depth range 800 - 1000 m [3757]

Dentition
Jaw teeth minute in size, arranged quincuncially and similar in shape on both jaws; 51 (51-66) on upper and 49 (48-65) on lower jaw margins. Each tooth (Fig. 1 E) on broad and bifid root, with an erect and sharp-pointed central cusp and a pair of short lateral cusps: up to 2 additional smaller cusps usually present in adult females, but very rare in adult males: 2 or 3 tooth series functional. [3757]