Lithodidae Dromiidae Atelecyclidae Cancridae Pirimelidae Cheiragonidae Dorippidae Eriphiidae Epialtidae Inachidae Oregoniidae Pilumnidae Geryonidae Portunidae Potamidae Panopeidae Xanthidae Grapsidae Images Name list Publications Sites Whole checklist По-русски (in Russian) Porcellanidae Varunidae Camptandriidae Macrophthalmidae Pinnotheridae Hapalogastridae Plagusiidae Far East / North Pacific Black Sea Baltic Sea Freshwater crabs Arctic Ocean Designed and composed by Alex Alyakrinsky, 2011 Lithodidae Lithodes couesi Benedict, 1895 Far East / North Pacific Range. Bering Sea, north of Unalaska near Shumagin Islands, Alaska {Benedict, 1894); near  San Diego (Schmitt, 1921); Okhotsk Sea (present paper); Pacific coast of northern Japan,  Hokkaido to off Onahama, (Sakai, 1976). At a depth of 542 to 1125 m (Makarov, 1938).  [Komai & Amaoka, 1989, p. 288].  Size of carapace: 123,2 mm (length), ovigerouse female, 125, 4 mm (length), male. [Komai &  Amaoka, 1989, p. 287].  Genus Lithodes Latreille, 1816 Lithodes couesi Benedict, 1894 Lithodes couesi Benedict, 1894, 281; Rathbun, 1904, 166; Schmitt, 1921, 162, pi. 29, figs. 3- 5 ; Makarov, (1938) 1962, 255, fig. 101 ; Sakai, 1971, 13, 35, pis. 5, 13 ; 1976, 696, pi. 242. Materials : HUMZ-C 767, 1 male (cl 125.4 mm), HUMZ-C 768, 1 ovigerous female (cl 123.2 mm),  OST 8702. Diagnosis : Carapace as long as wide, with rounded margins, areas distinct, covered with various size  conical spines. Rostrum short, horizontally produced, apex feebly bifid, with 2 pairs of small lateral  spines, 1 pair on near tip, and another near proximal portion, and with a median spine between posterior  lateral spines ; ventral spine strong, barely falling short of tip of rostrum. Gastrocardiac boundary  strong-ly depressed, branchiocardiac not so depressed. Gastric region with 5 relatively large spines, 1  situated on median line. Cardiac region with spines symmetrically arranged. Branchial region with 10-12  large spines on dorsal surface. Lateral margin slightly raised in posterior region, armed with about 22  spines on each side, of which 4 including postorbital spine on hepatic and 3 on branchial region large.  Intestinal region with pair of spines near posterior margin.  Eye short, stout, cornea ventral, with acute small process dorsally. Antenna! acicle rudimental,  simply tuberculiform. Chelipeds dissimilar, right one stouter, 1.4 times longer than carapace in male, 1.2  times in female, covered with numerous spines ; fingers with molar-like teeth on cutting edge, but in  male those of left chela with no tooth. Second to 4th pereopods slighly depressed, 3rd and 4th slightly  longer than 2nd, 2.6 times longer than carapace in male, 2.2 times in female, covered with spines;  proximal part of dactylus surrounded by 4 larger, inclined spines.  Abdomen with many tubercles; 2nd abdominal somite composed of 3 plates, with pair of large  tubercles on median plate; in female, margins of 2nd to 6th somites armed with about 30 strong spines.  Color of fresh specimen : Carapace pinkish white, pereopods reddish brown, spines on pereopods  yellowish brown. Ventral side pale compared with dorsal side. In male, teeth on cutting edge of right  chela white. Cornea of eye black.  Remarks : This species is widely the North Pacific region, but never taken from the  Okhotsk Sea, in which a sympatric L. aequispina Benedict has been known.  L. couesi is readily distinguished from L. aequispina in having a rudimental antennal acicle (cf.  well developed, bifid spiniform in L. aequispina) and 7 tiny spines on the rostrum (9 strong spines).  [Komai & Amaoka, 1989, p. 287, 288].  Anomura, photo of crab Lithodes couesi Benedict, 1895