биота российских вод японского моря - Materials of Alexey Shipunov

Geographical distribution. N. brevirostre is a circumpolar arctic-boreal species.It is greatly variable; 9 subspecies were found in the Arctic region (Losina-Losinsky,1935; Turpaeva, 2004a). In the Far Eastern seas of Russia it occurs in the Bering Sea,Sea of Okhotsk, and the northern part of the Sea of Japan, where it was recorded nearthe western coast of the South Sakhalin and in the Tatar Strait. A subspecies N.brevirostre kurilensis Losina-Losinsky, 1961 occurs in the Pacific Ocean on the shelfsurrounding the Kuril Islands. In the Sea of Okhotsk, near the Yamskie Islands N.brevirostre ochoticum Turpaeva, 2004 has been recently described. On the North-American shelf two forms were found, described as N. microcollis Hilton, 1942 and N.gracile Hilton, 1942, but Hedgpeth (1949) considers them forms of N. brevirostre.Vertical distribution. The species is distributed from the littoral zone to a depthof 677 m.3. Nymphon striatum Losina-Losinsky, 1929(Pl. III, figs. 7–12)Losina-Losinsky, 1929: 538–340, fig. 1; 1933: 64–67, fig. 13; 1961: 59; Nesis, 1967:248; 1976: 77, fig. 178; Hong, Kim, 1987: 139, 160–161; Nakamura & Child, 1991: 61–62;Nakamura, 1994: 15; Turpaeva, 2004a: 1092–1093.Description. Trunk elongated, slender; lateral processes separated by twice theirown diameters. Cephalic segment equal in length to rest part of trunk; neck very long,thin, in large specimens reaches half length of cephalic segment; neck of juvenilesslightly shorter. Anterior part of segment 1 broadened; 2 tall tubercles in shape oftruncated cone situated near frontal margin. Proboscis cylindrical, 1.5 to 2 timesshorter than segment 1. Abdomen short, slightly expanded medially, erected almostvertically. Chelifore moderately long; scape longer than proboscis; chela slightlyshorter than scape; fingers with curved tips, slightly shorter than palm. Palp thin; itssegment 2 slightly longer than segment 3, segments 4 and 5 equal in length, orsegment 5 slightly longer. Male oviger 1.5 times longer than trunk; female ovigerslightly shorter than trunk; segment 4 longest; compound spines serrate, with one pairof lateral teeth. Legs 3.5 to 5 times longer than trunk, thin, with sparse long setae;femur slightly shorter than tibia 1; tibia 1 shorter than tibia 2; length of tarsus varies:large specimens’ tarsus twice longer than propodus, juveniles' tarsus almost equal topropodus; propodal sole armed with one row of spinules, among which 2–3, rarer 5,large spines situated medially, sometimes large spines absent. Main claw heavy,slightly curved distally, shorter than half of propodus; auxiliary claws slightly shorterthan half of main one. Body length about 8 mm.Geographical distribution. N. striatum is known only from the Far Eastern seas.It occurs off the north-eastern coast of the Korea Peninsular, near Hokkaido Island, theeastern coast of Japan and in Toyama Bay; it is also found near the Pacific Oceansides of Shikotan and Kunashir islands (the Kurils) and in the south of the Sea ofOkhotsk. In the Sea of Japan it was recorded near the coast of Primorsky Region (fromPossjet Bay to De-Kastri Bay) and the south-western coast of Sakhalin Island.Vertical distribution. The species is sublittoral; it occurs at depths of 1–180 m.98