Author: (Jordan and Snyder, 1904)
Galeus with light mouth, long and narrow snout, prenarial snout shorter than eye, no subcaudal crest, obscure colour pattern, slender body, and small anal fin.
Precaudal tail not greatly compressed as base. Snout moderately long and narrowly parabolic, preoral length about 5 to 6% of total length; prenarial snout shorter than eye diameter; eyes virtually lateral on head, with slight subocular ridges; mouth moderately large and long, broadly arched, width about 6% of total length; labial furrows moderately long, not confined to mouth corners. Pelvic fins small, low and angular; interspace between pelvic and anal bases much shorter than anal base; anal fin short, its base about 12% of total length and much shorter than intredorsal space; anal origin under anterior half of interdorsal space. No subeaudal crest of enlarged denticles on preventral caudal margin. A colour pattern of obscure dark saddle blotches on body and caudal fin, dorsal fins and caudal tip whitish; mouth lining light. Monospondylous precaudal centra 33 to 36. Size small, adults to at least 40 cm.
Western North Pacific: Japan, East China Sea, Viet Nam.
Habitat and Biology:
A little-known, but very common small shark in Japanese waters, found in deep water near the bottom. Development oviparous, with a single egg laid per oviduct. In Japanese waters this species shows sexual segregation, with reported schools of mostly females. Egg-case 6 x 1.6 cm.
Possibly to 50 cm maximum, adult males maturing at about 31 to 32 cm and reaching at least 36 cm; adult females maturing at about 36 to 37 cm and reaching at least 40 cm.
Interest to Fisheries:
None at present.
The illustration is taken from the holotype.
Holotype: Stanford University SU-7740, 345 mm female. Type Locality: Off Izu, Japan.