Hydrolagus melanophasma

JAMES & EBERT & LONG & DIDIER, 2009


Eastern Pacific Black Ghostshark
Classification: Holocephali Chimaeriformes Chimaeridae

Reference of the original description
JAMES, K.C. & EBERT, D.A. & LONG, D.J. & DIDIER, D.A. (2009)
A new species of chimaera, Hydrolagus melanophasma sp. nov. (Chondrichthyes: Chimaeriformes: Chimaeridae), from the eastern North Pacific. Zootaxa, 2218: 59–68

Image of the original description
Image in copyright.

Types
Hydrolagus melanophasma
Holotype: SIO: 77-211; Paratype: LACM: 39805-1;


Description :


Citation: Hydrolagus melanophasma JAMES & EBERT & LONG & DIDIER, 2009: In: Database of modern sharks, rays and chimaeras, www.shark-references.com, World Wide Web electronic publication, Version 10/2018

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Hydrolagus melanophasma. a) Male 1175 mm TL (IZUA-PM 4007), b) female 1277 mm TL (IZUAPM 4011). Scale bar represents 250 mm. © Carlos BustamanteHydrolagus melanophasma. a) Male 1175 mm TL (IZUA-PM 4007), b) female 1277 mm TL (IZUAPM 4011). Scale bar represents 250 mm. © Carlos Bustamante
Common names
eng Eastern Pacific Black Ghostshark

Short Description
A species of the genus Hydrolagus based on the absence of an anal fin. Hydrolagus melanophasma sp. nov. is distinguished from other chimaeroids by a blunt snout with minimal sloping from the orbit to the snout tip, a large slightly curved dorsal fin spine (25.9 % BDL) extending beyond first dorsal fin apex, and a long second dorsal fin (77.3–81.1% BDL) of uniform height throughout. The pectoral fins are large, reaching beyond the pelvic fin insertion when laid flat, trifid claspers forked for 27–27.8% of the total clasper length and the preopercular and oral lateral line canals branch separately or together from the infraorbital canal. Coloration after preservation is a uniform black with no distinct mottling or markings (Ref. 82286).

Distribution
Eastern Pacific Ocean: Baja California, Mexico. Source: www.gbif.org

Biology
Subtropical

Size / Weight / Age
Max length : 120 cm TL male/unsexed; (Ref. 82286)

Habitat
Benthopelagic; marine; depth range 577 - 1400 m (Ref. 82286)

Remarks
65072