Platymaia remifera Rathbun, 1916

Takeda, Masatsune, Ohtsuchi, Naoya & Komatsu, Hironori, 2021, Crabs (Crustacea, Decapoda) from the Sea off East and Southeast Asia collected by the RV Hakuhō Maru (KH- 72 - 1 Cruise) 1. Sulu Sea and Sibutu Passage, Bulletin of the National Museum of Nature and Science. Series A, Zoology 47 (2), pp. 65-97 : 83

Platymaia remifera Rathbun, 1916

( Fig. 12F )

Material examined. RV Hakuhō Maru KH-72-1 cruise, sta. 11 (Sulu Sea ; 08°12.7′N, 117°59.6′E – 08°11.8′N, 117°58.5′E; 285–306 m deep); 3 m beam trawl; 26 May, 1972; 1 ˁ ( CB 29.4 mm; CL 27.4 mm including rostral spine), 1˂ (ovig.) ( CB 37.1 mm; CL 35.6 mm), NSMTCr 28976; 1 ˂ ( Fig. 10F ) ( CB 31.6 mm; CL 28.7 mm), NSMT-Cr 28977 .

RV Hakuhō Maru KH-72-1 cruise, sta. 12 (Sulu Sea ; 08°19.0′N, 118°09.1′E – 08°18.7′N, 118°08.5′E; 495–500 m deep); 3 m beam trawl; 26 May, 1972; 6 ˁˁ ( CB 9.2 mm; CL 8.4 mm – CB 21.8 mm; CL 20.1 mm), 6˂˂ ( CB 9.9 mm; CL 9.3 mm – CB 21.5 mm; CL 19.3 mm), NSMTCr 28992 .

Remarks. The genus Platymaia is comprised of 10 species from Indo-West Pacific ( Griffin and Tranter, 1986; Ng et al., 2008). We have many specimens of various sizes (CB 9.2–37.1 mm), which agree well with the description by Guinot and Richer de Forges (1986).

Lee et al. (2017) recently recorded P. aff. remifera from the South China Sea, noting that the interior border of the branchial region is armed with three strong spines in the South China Sea specimens and five weak spines in the Taiwanese specimens. Based on our specimens, however, this character seems variable. There is one strong spine followed by one to four spines of variable distinctness.

Distribution. Philippines ( Guinot and Richer de Forges, 1986; this study), Taiwan ( Ng and Huang, 1997), and South China Sea ( Serène and Lohavanijaya, 1973); 100–700 m deep.

Figures

Fig. 12. A–C: Cyrtomaia horrida Rathbun, 1916, male (A) (NSMT-Cr 28972. CB 15.2mm excluding branchial tubercles; CL 15.0mm excluding pseudorostral spines), male (B–C) (NSMT-28973. CB 8.3mm; CL 9.0 mm). D–E: Cyrtomaia largoi Richer de Forges and Ng, 2007, female (D) (NSMT-Cr 28974. CB 22.7mm; CL 20.9mm excluding pseudorostral spines), male (E) (NSMT-Cr 28991. CB 7.7mm; CL 8.3mm). F: Platymaia remifera Rathbun, 1916, female (NSMT-Cr 28977. CB 31.6mm; CL 28.7mm including rostral spine).

Fig. 10. Lysirude goekei sp. nov., male, holotype (NSMT-Cr 28969. CB 16.6mm; CL 26.8mm including rostrum). Orbital region in dorsal view (A), left chela in outer view (B), propodus and dactylus of left third ambulatory leg (C), left G1 in mesial view (D), apex of the same enlarged (E), left G2 in mesial view (F). Scale bar: 2mm for A–C, 1mm for D, F, and 0.25mm for E.