биота российских вод японского моря - Materials of Alexey Shipunov

thick, in some specimens 2 times shorter than palm, with equal teeth on inner margin.Palp almost 1.5 times longer than proboscis; its segment 2 shorter than segment 3;segment 4 almost twice shorter than segment 5; distal segments densely covered withsetae. Oviger long (male oviger 1.5 times longer than trunk), thin; segments 4 and 5longest, slightly broadened distally; segments 6–10 combined shorter than segment 5;compound spines thin, denticulate, with one pair of large lateral teeth. Legs 4 timeslonger than trunk; coxae short; femur slightly longer than tibia 1; tibia 2 1/3 longerthan femur; tarsus usually longer than propodus, but may also be shorter (especially injuveniles); propodus slightly curved, with one row of spinules and 4–8 large spinesproximally and often also medially on sole; main claw strong, curved, slightly longerthan half of propodus; auxiliary claws as long as half of main one. Body length 6 mm,width – 54 mm.Geographical distribution. N. grossipes is a circumpolar arctic-boreal species.In the Pacific Ocean it inhabits the Bering Sea, Sea of Okhotsk and the northern partof the Sea of Japan (near the South Sakhalin). It also occurs on the Pacific side of theshelf zones of the Kuril and Japan islands.Vertical distribution. N. grossipes is found in depths from 4 to 1466 m. In theseas of the Russian Far East it has been found between 20 and 592 m of depth.Remarks. The species varies greatly, especially towards the borders of itsgeographical range. Thus, for example, in the Pacific Ocean, east of Honshu Island, N.heterospinum was found (Hedgpeth, 1949), which Losina-Losinsky (1961) and laterHedgpeth (1963), assigned to N. grossipes. Hedgpeth also considers N. nigrognatumHilton, 1942, found off Vancouver Island, and N. oculospinum Hilton, 1942, found inthe Gulf of California, to be the forms of N. grossipes. Losina-Losinsky, in his studiesof the specimens from Far Eastern seas (1961), notes that there are transitional formsbetween N. grossipes and N. mixtum Kroyer.2. Nymphon brevirostre Hodge, 1863(Pl. II, figs. 7–13)Schimkewitsch, 1930: 392–400, figs. 98, 99; Losina-Losinsky, 1961: 51 (pl. 1), 67–69;Hedgpeth, 1949: 235 (tabl. 1), 242 (tabl. 2), 246, 248; Turpaeva, 2004a: 1086.Description. Trunk small, but robust, cylindrical, almost smooth; segment 1equal to segments 2 and 3, anterior part rather broadened, neck short. Ocular tuberclelow, in shape of truncated cone, with two lateral bumps (“shoulders”). Probosciscylindrical, rounded on top, shorter than segment 1 of trunk. Abdomen straight, short.Chelifore strong, with sparse setae; scape and chela equal in length, as long asproboscis or slightly shorter; fingers shorter than palm, both armed similarly. Palpthin, short, slightly longer than scape of chelifore; segment 2 as long as segment 3 orslightly longer; segment 4 shorter than segment 5. Oviger has normal length,compound spines lanceolate, serrate, with one pair of lateral teeth. Legs slightly morethan 3 times longer than trunk, with sparse short setae; 2nd coxa 1.5 times longer thaneach of 2 others; femur and tibia 1 almost equal; tibia 2 longest; tarsus shorter thanpropodus, propodus gently curved, with several large spines proximally and mediallyon sole; main claw as long as 1/3 to 1/2 of propodus, strong; auxiliary claws equal tohalf of main claw or shorter. Body length about 5 mm.97