Birulia kishinouyei (Yokoya, 1930)

Xu, Peng & Li, Xin-Zheng, 2015, Report on the Hippolytidae Bate (sensu lato) from China seas, Zoological Systematics 40 (2), pp. 107-165 : 133-135

Birulia kishinouyei (Yokoya, 1930) ( Fig. 15 )

Paraspirontocaris kishinouyei Yokoya, 1930: 536 ; Holthuis, 1947: 43. Type locality: Mutsu Bay , Japan.

Birulia kishinouyei Urita, 1942: 67 .

Material examined. MBM129571 , 1 ♀ (cl 14.33 mm), Chinese coastal water, Yellow Sea, 1976-6-27, st. 1, 78 m, BT, sand, no. OP132B-5, coll. Rui-Yu Liu .

Description. Body rather stout and covered with short hairs. Rostrum projecting obliquely downwards, not only laterally compressed but also provided with rather strong rib on each side and is about 4/5 length of carapace. Carapace carinated in medial line; with very strong supraorbital tooth at base of rostrum on each side, directing forwards and outwards; carapacedilated outwards and forwards to sharp point at branchiostegal angle, but without antennal tooth.

Basal segment of antennular peduncle longer than distal 2 segments combined; stylocerite well-developed, reaching distal margin of second segment of antennular peduncle; second segment with distolateral spine, slightly shorter than third segment, which dorsal margin with sharp spine distally. Antennal scale overreaching apex of rostrum by distal 1/5; 1.7 times as long as wide; distolateral spine falling short of rounded distal margin of lamella. Mandible with molar process, incisor process and 2-segmented palp.

© Zoological Systematics, 40 (2): 107–165

Third maxilliped and anterior 3 pereopods with epipods. Third maxilliped slightly overreaching distal margin of antennal scale, without exopod; ultimate segment flattened, with 7 corneous spines distally. First pereopod stout, reaching near to midpoint of ultimate segment of third maxilliped; dactylus with bifid tip. Second pereopod slender, reaching distal margin of antennal scale; chela small; carpus subdivided into 7 articles, of which proximal third one longest. Ambulatory pereopods similar in structure. Flexor margin of dactlyus with 3 spinules excluding terminal claw; propodus with 2 rows of 40–50 spinules along entire length of flexor margin. Merus of third or fourth pereopod armed with 2 distolateral spines; merus of fifth pereopod with only 1 distolateral spine.

First somite dorsally armed with two spinular tubercles in pair on anterior portion, while posterior half dorsally carinated in medial line. Third and fourth somites dorsally strongly carinated in medialline, and these carinae more or less © Zoological Systematics, 40 (2): 107–165 posteriorly pointed. Anterior half of fifth somite dorsally carinated in medial line, while posterior half dorsally rather flat surfaced, and pair of obtuse carinae extend backwards to two acute points. Sixth somite dorsally rounded, but posteriormargin is produced backwards to an acute point: besides this each side of sixth somite pointed backwards. Pleurae of fourth and fifth abdominal somites each with small posteroventral tooth. Telson longer than preceding two segments combined and exceeding tip of uropod; distal 1/3 of dorsal surface with 2 pairs of spines; posterior margin with 2 pairs of acute spines.

Distribution. Yellow Sea; Northern Gulf of Japan, Sea of Okhotsk; 30– 100 m.

Figures

Fig. 15. Birulia kishinouyei (Yokoya, 1930). A. Carapace, lateral view; B. Abdominal pleurae, lateral view; C. Antennule, dorsal view; D. Antennal scale, dorsal view; E. Third maxilliped, lateral view; F. First pereopod, lateral view; G. Second pereopod, lateral view; H. Third pereopod, lateral view; I. Telson, dorsal view. Scale bars=1 mm.