BASEODISCUS OHTSUKAI SP. NOV.

(FIG. 7D, E)

Zoobank registration: u r n: l s i d: z o o b a n k. org:act: 5DBE9E10-9A24-447B-9A7F-EE5DD10891E0.

Material examined: Holotype, ICHUM 6327, 29 May 2001 off Toi Cape (31°19′12″N, 131°21′00″E), Kagoshima, Japan, 118 m depth, station 12 of the R / V Toyoshio-maru Cruise 01-06, collected by H. Kajihara.

Sequences: From the holotype: LC178592, 18S (1799 bp); LC178622, 28S (2117 bp); LC178667, 16S (456 bp); LC190945, COI (629 bp) .

Etymology: The new specific name is a noun in the genitive case, from Prof. Susumu Ohtsuka, a Japanese crustacean biologist, leader of marine biodiversity studies with the R/V Toyoshio-maru of Hiroshima University.

Description: Body broad, dorsoventrally flattened, 15 cm long, 4 mm wide; ground colour white, dorsally with wide purplish brown stripe, ventrally with minute flecks of same colour (lacking in front of cephalic furrow); transverse cephalic furrow present, encircling neck; secondary furrows present; small, black ocelli distributed along dorso-lateral surfaces of head; proboscis pore sub-terminal; mouth small (Fig. 7D, E). Found in mucus tube formed with mud and sand particles.

Distribution: So far known only from the type locality, sublittoral, off southern Kyushu in the Pacific (present study).

Remarks: Baseodiscus ohtsukai looks similar to B. urgorrii in that it has a whitish background colour and a broad, mid-dorsal longitudinal stripe, but differs from the latter in the colour of the stripe, which is more reddish than that in B. urgorrii .