Leptomithrax kiiensis T. Sakai, 1969: 255 Miyake, 1983: 48 Sakai, 1976: 243 Baba et al., 1986: 223 Takeda, 1980: 280 Takeda, 1993: 37 Ikeda, 1998: 37 Revision of the spider crab genus Maja Lamarck, 1801 (Crustacea: Brachyura: Majoidea: Majidae), with descriptions of seven new genera and 17 new species from the Atlantic and Indo-West Pacific Ng, Peter K. L. Forges, Bertrand Richer De Raffles Bulletin of Zoology 2015 2015-05-29 63 110 225 4RLXF (T. Sakai, 1969) T. Sakai 1969 [925,1338,188,213] Malacostraca Majidae Rathbunaja Animalia Decapoda 102 212 Arthropoda species kiiensis  ( Figs. 59C–E, 61E, F, 63C, D, 64C, 65E–G, 66H–M)      Leptomithrax kiiensisT. Sakai, 1969: 255, pl. 1 fig. 4. –  Miyake, 1983: 48, pl. 16 fig. 4. – T.  Sakai, 1976: 243, text fig. 130. – Matsuzawa, 1977: pl. 96 fig. 3. –  Baba et al., 1986: 223, fig. 167. –  Takeda, 1980: 280. –  Takeda, 1993: 37. –  Ikeda, 1998: 37, 118, 119, pl. 42.   Material examined.  Holotype: male (53.7 × 45.0 mm) ( USNM 125885), Kii Minabe, Kii Peninsula, Wakayama Prefecture, Honshu, Japan, coll. M. Ozaki. Others:  Japan– 1 male(49.9 × 39.1 mm) (NSMT-Cr 5094), Kushimoto, Kii Peninsula, coll.  15 July 1977. — 1 ovigerous female (43.8 × 37.3 mm) (NSMT-Cr 6419), 26°43.8’N 135°20’E, Kita-Koho Channel, Kyushu-Palau Ridge,  320 m, coll.  14 February 1978. — 1 female(44.0 × 34.8 mm) (NSMT-Cr 12211), station T13, 29°25.8’N 127°18.0’E– 29°24.4’N 127°17.9’E, East China Sea,  169 m, coll.  27 September 1997.   Diagnosis.Carapace relatively narrow ( Fig. 59C–E). Pseudorostral spines long, distinctly diverging ( Fig. 59C–E). Median row with 2 median gastric spines; 2 cardiac spines; 2 or 3 intestinal spines ( Fig. 59C–E). Basal antennal article with 2 relatively short distal spines not strongly diverging ( Fig. 61E). Ischium of third maxilliped proportionately shorter ( Fig. 63C, D). Ambulatory merus relatively long, slender ( Figs. 59C, E, 65F). Male telson subtriangular ( Fig. 64C). G1 relatively more curved, distal part relatively longer ( Fig. 66H–M).   Remarks.The type of  Rathbunaja kiiensisis the largest known specimen. Although it is only slightly larger than another male specimen (male 49.9 × 39.1 mm, NSMT-Cr 5094), its chela is more prominently enlarged, with a distinct swelling on each margin of the palm ( Fig. 65Gversus Fig. 65E). The G1 has not been figured before. The G1 of the holotypemale is slightly less strongly curved than the other male and the dorsal fold on the distal part of the G1 of the holotypemale is also more pronounced ( Fig. 66H–Jversus Fig. 66K–M). However, we do not regard these differences as significant at the species-level. 1977-07-15 1997-09-27 1977-07-15 USNM, T Kii Minabe & Kii Peninsula & Honshu & Japan & M. Ozaki. Others & Kushimoto & Kita-Koho Channel & Kyushu-Palau Ridge Japan 320 29.406666 East China Sea 122 127.29833 102 212 USNM 125885, T13 2 1 1 Wakayama holotype