Apristurus bucephalus White, Last & Pogonoski, 2008
Bighead catshark
Bighead catshark
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Family:  Pentanchidae (Deepwater catsharks)
Max. size:  67.5 cm TL (female)
Environment:  bathydemersal; marine; depth range 1030 - 1140 m
Distribution:  Eastern Indian Ocean: Western Australia.
Diagnosis:  This moderately-large species has the following characters: labial furrows of upper and lower subequal in length; relatively short preorbital snout; very robust head, its width (at mouth corners) 13.9% TL; large mouth, its width 11.1% TL; large orbit, its length 3.7% TL; relatively long length of prepectoral and prepelvic; first dorsal fin is slightly smaller than second one, its origin well forward of pelvic fin insertion; tall anal fin, short based, triangular in shape; widely spaced dermal denticles, moderately large, deciduous, with long medial cusps; species size to at least 67.5 cm TL; uniformly medium yellowish brown body and fins ; about 66 teeth rows in upper jaw, about 55 rows in lower jaw; adult female teeth with 5 cusps, 1 very long medial cusp, 2 much shorter inner lateral cusps, 2 much shorter outer lateral cusps situated anteriorly to inner lateral cusps; 35 monospondylous vertebrae; 26 diplospondylous precaudal vertebrae; about 108 total vertebrae (Ref. 76944).
IUCN Red List Status: Data deficient (DD); Date assessed: 17 February 2015 Ref. (124695)
Threat to humans:  harmless
Country info:  Type locality, west of Mandurah, Western Australia, CSIRO H 2615-01 (holotype of Apristurus bucephalus, 67.5 cm TL, female). Collected off the mid continental slope off the south-west coast of Western Australia, from off Mandurah (32°33′ S, 114°25′ E) and south-west of Cape Leeuwin (35°02′ S, 114°46′ E), 920-1140 m depth (Ref. 76944).

Entered by: Capuli, Estelita Emily - 11.07.08

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