Rathbunaja kiiensis (T. Sakai, 1969 )

Ng, Peter K. L. & Forges, Bertrand Richer De, 2015, 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, Raffles Bulletin of Zoology 63, pp. 110-225 : 212-216

publication ID	https://doi.org/ 10.5281/zenodo.5384590
publication LSID	lsid:zoobank.org:pub:40BCDD62-D35E-46D1-95A3-2CC0DF219DEE
persistent identifier	https://treatment.plazi.org/id/03A9654B-FFE7-0732-54FA-FF3F78BDFD16
treatment provided by	Valdenar
scientific name	Rathbunaja kiiensis (T. Sakai, 1969 )
status

Treatment

Rathbunaja kiiensis (T. Sakai, 1969) View in CoL

( Figs. 59C–E View Fig , 61E, F View Fig , 63C, D View Fig , 64C View Fig , 65E–G View Fig , 66H–M View Fig )

Leptomithrax kiiensis T. Sakai, 1969: 255 View in CoL , 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 View Materials ), 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. GoogleMaps

Diagnosis. Carapace relatively narrow ( Fig. 59C–E View Fig ). Pseudorostral spines long, distinctly diverging ( Fig. 59C–E View Fig ). Median row with 2 median gastric spines; 2 cardiac spines; 2 or 3 intestinal spines ( Fig. 59C–E View Fig ). Basal antennal article with 2 relatively short distal spines not strongly diverging ( Fig. 61E View Fig ). Ischium of third maxilliped proportionately shorter ( Fig. 63C, D View Fig ). Ambulatory merus relatively long, slender ( Figs. 59C, E View Fig , 65F View Fig ). Male telson subtriangular ( Fig. 64C View Fig ). G1 relatively more curved, distal part relatively longer ( Fig. 66H–M View Fig ).

Remarks. The type of Rathbunaja kiiensis is 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. 65G View Fig versus Fig. 65E View Fig ). The G1 has not been figured before. The G1 of the holotype male is slightly less strongly curved than the other male and the dorsal fold on the distal part of the G1 of the holotype male is also more pronounced ( Fig. 66H–J View Fig versus Fig. 66K–M View Fig ). However, we do not regard these differences as significant at the species-level.