биота российских вод японского моря - Materials of Alexey Shipunov

ears 4 large spines on sole proximally and about 8 medially and distally. Main clawcurved, reaches middle of propodus; auxiliary claws longer than 2/3 of main one.Geographical distribution. The species has been recorded in the Sea of Okhotskand the Sea of Japan (west of Sakhalin), also near Japan on the Pacific side (offHokkaido Island and in Sagami Bay).Vertical distribution. C. armatus occurs in the high sublittoral zone to a depthof 700 m.*Genus Ascorhynchus Sars. 1877Type species: Ascorhynchus abyssi Sars, 1877.Trunk elongated, segmented, smooth or with conical tubercles and setae.Cephalic segment with long neck. Lateral processes long, separated by broad intervals.Ocular tubercle varied in shape; eyes present not in all species. Proboscis large, curveddownwards; proximal part thin; distal part pyriform. Abdomen long, slender.Chelifore 2–3-segmented; chela with reduced fingers. Palp 9–10-segmented, thin,longer than proboscis. Oviger 10-segmented; segments 4 and 5 longest; segment 6also long; segments 7 through 10 bear several rows of compound spines; terminalclaw present. Legs long; tarsus short or elongated, but shorter than propodus;propodus lacks basal spines; main claw of various lengths; no auxiliaries.There are three species of the genus in the Sea of Japan.KEY TO THE SPECIES OF THE GENUS ASCORHYNCHUS1(2). Dorsal side of trunk smooth, mid-dorsal line devoid of tubercles .............................................................................................................. *A. glaberrimum (p. 118)2(1). Tubercles present on trunk, lateral processes, and coxae 1 of legs.3(4). Coxa 2 bears finger-shaped projections, as long as half diameter to diameter ofcoxa 2 ................................................................................. *A. ramipes (p. 118)4(3). Projections on coxa 2 very short ...................................... *A. glabroides (p. 119)*Ascorhynchus glaberrimum Schimkewitsch, 1913(Pl. XVII, figs. 1–5)Schimkewitsch, 1913: 242, pl. 3, figs. 8–14; Nakamura, 1987: 29–30, pls. 25, 26.A. glaberrimum occurs off the western and eastern coasts of Japan from shallowwaters to 300 m depth.*Ascorhynchus ramipes (Böhm, 1879)(Pl. XVII, figs. 6–11)Böhm, 1879a: 56, fig. 1 (Gnaptorhynchus ramipes); Nakamura, 1987: 31–32, pl. 28.A. ramipes is a widespread species. It inhabits the Indian Ocean, the Gulf ofSiam, the East China and Yellow seas, and the Sea of Japan; it also occurs near thewestern and eastern coasts of Japan in 10–200 m depths.118