BASEODISCUS KAKUII SP. NOV.

(FIG. 3J, K)

Zoobank registration: u r n: l s i d: z o o b a n k. o r g: a c t: 9 7 0 3 B 1 F D - 6 E 5 8 - 4 7 4 A - A 0 7 0 - 774EB904159D.

Material examined: Holotype, ICHUM 6334, 26 May 2014, off Oki Island, Sea of Japan (between 34°04′36″N, 129°59′13″E and 34°04′32″N, 129°59′24″E), 93 m depth, collected by K. Kakui on cruise #2014-06 of the R / V Toyoshio-maru.

Sequences: From the holotype: LC178603, 18S (1773 bp); LC178635, 28S (2102 bp); LC178684, 16S (506 bp); LC190956, COI (658 bp) .

Etymology: The new specific name, a noun in the genitive case, refers to the collector of the holotype, Dr Keiichi Kakui (Hokkaido University), a Japanese tanaidacean systematist.

Description: Background body colour dark yellow, gradually tinged brownish mid-dorsally. Body of holotype 6.6 cm long, 2.4 mm wide (posterior end lacking) (Fig. 3J). Margins of dorsal brown colour evident on head; small, black eyes arranged on dorsolateral surfaces of head (Fig. 3K).

Distribution: Known only from the type locality, Sea of Japan (present study).

Remarks: Baseodiscus kakuii was the sister-taxon to the clade containing B. aureus, B. cf. curtus, B. urgorrii, and Clades B and C in our ML tree (Fig. 1). The body coloration of B. kakuii resembles that of B. nipponensis, but the former is more yellowish and darker, and has the eyes more pronounced, than the latter.