Cyrtomaia suhmii Miers, 1886

(Fig. 5B)

Material examined. RV Hakuhō Maru KH-72-1 cruise, sta. 26 (Timor Sea; 09°27.0′S, 127°58.6′E –09°285.0′S, 127°56.1′E, 610–690 m depth), 3 m beam trawl; June 19, 1972; 1 ♂ with epicaridean parasites in both branchial chambers (NSMT-Cr 29259: CB 31.6 mm excluding branchial spines, CL 26.2 mm excluding pseudorostral spines), 1 ♂ with epicaridean parasite in right branchial chamber (NSMT-Cr 29260: CB 32.7 mm, CL 28.0 mm).

Remarks. Both of the specimens examined are infected by epicaridean parasites; in the smaller male (NSMT-Cr 29259: Fig. 5B), the branchial chambers of both sides are heavily deformed, and in another, slightly larger male (NSMT-Cr 29160), the right branchial chamber is also strongly bulged.

Takeda et al. (2021) recorded two species of Cyrtomaia, C. horrida Rathbun, 1916 from the Sulu Sea and C. largoi Richer de Forges and Ng, 2007 from the Sibutu Passage, with some taxonomic comments. This species is distinctly different from them in having long protogastric spines. Richer de Forges and Guinot (1988) discussed the differences between the new species, C. coriolisi, and C. suhmii Miers, 1886, and indicated that there is only a vestigial intercalated granule instead of spinule on the supraorbital border in C. coriolisi . The morphological features other than the deformity of the branchial chambers essentially agree with the descriptions and illustrations by Griffin and Tranter (1986a), Guinot and Richer de Forges (1985), Richer de Forges and Guinot (1990), Promdam (2011), and Padate et al. (2021).

Distribution. Indo-West Pacific, from Japan to Australia and India through the Philippines and Indonesia, 488–1125 m depth. Davie (2002) recorded this species in the Zoological Catalogue of Australia based on the records by Griffin and Brown (1976), Griffin and Tranter (1986a), and Davie and Short (1989).