Kasagia Richer de Forges & Ng, 2007

Forges, Bertrand Richer De, Lee, Bee Yan & Ng, Peter K. L., 2021, The taxonomy of spider crabs of the genera Eurynome, Choniognathus, Seiitaiodes and Kasagia (Crustacea: Brachyura: Majidae) from southwest Indian Ocean, Zootaxa 5048 (3), pp. 301-333 : 322

Genus Kasagia Richer de Forges & Ng, 2007

Kasagia Richer de Forges & Ng, 2007: 59 , 60.

Comparative material examined. Kasagia arbastoi Richer de Forges & Ng, 2007 : Paratype: 1 male (cl 12.6 mm, pcl 10.8 mm, cw 9.2 mm, bcw 7.7 mm) ( ZRC 2013.176 ), Balicasag Island , Panglao, Bohol, Philippines, 200–300 m, coll. fishermen, June 2002 . Others: 2 males (cl 13.4 mm, pcl 10.9 mm, cw 8.0 mm, bcw 7.6 mm; cl 13.4 mm, pcl 10.2 mm, cw 7.5 mm, bcw 7.1 mm) ( ZRC 2014.364 ), stn PN1, Balicasag Island , Panglao, Bohol, Philippines, 200–300 m, coll. PKL Ng, March 2004 .— 1 male (cl 13.3 mm, pcl 10.2 mm, cw 7.8 mm, bcw 7.2 mm) ( ZRC 2020.375 ), stn PN 1, Balicasag Island , Panglao, Bohol, Philippines, 200–300 m, coll. fishermen, November 2003 .

Diagnosis. Carapace longitudinally ovate. Dorsal carapace surface with regions poorly defined, covered with low and flattened granules, never with boletiform tubercles or spines.

Pseudorostral spines long, ovate in cross-section, outer margin with small spinules. Supraocular margin forming complete eave, raised, cristate, partially overlapping cup-like postocular spine; intercalated spine absent. Hepatic region with single auriculiform lobe. Ocular peduncule short, eye rounded, totally concealed orbit when retracted. Basal antennal article triangular. Outer surface of third maxilliped with low granules, no spines; anteroexternal angle of merus prominently produced, auriculiform. Adult male cheliped very long, covered with setae; merus, carpus and chela covered with spines; chela long; fingers slightly bent, tips crossing when closed. Ambulatory legs short; dorsal margin of merus carinate, with small proximal spine in smaller specimens, otherwise unarmed; other articles covered by setae. Male thoracic sternites 2–4 relatively wide. Male pleon with 6 free segments and telson. G1 sinuous, relatively stout, distal part dilated, tip bifurcated. G2 short, with short distal segment.

Type species. Kasagia arbastoi Richer de Forges & Ng, 2007 , by original designation.

Remarks. Kasagia was described by Richer de Forges & Ng (2007) for K. arbastoi , collected from Philippines. With the transfer of one species previously in Choniognathus , and a new record from southwestern Indian Ocean, there are currently three species recognised from this genus.