Catapaguroides longior Komai, Yamada & Shirakawa 2010

Catapaguroides longior Komai, Yamada & Shirakawa, 2010

(Figs. 1F, G, 4 E–J)

Catapaguroides longior Komai, Yamada & Shirakawa, 2010: 33, figs. 1–4, 5A (type locality: Okinawa Island, Ryukyu Islands).

Material examined. Ie Island, unnamed submarine cave: main tube, near bifurcation of tube, 8 September 2016, 1 male (sl 2.1 mm), RUMF-ZC-6027 (IE 60); main tube, 9 September 2016, 2 males (sl 1.4, 2.1 mm), RUMF-ZC- 6028 (IE 65). Okinawa Island, Hedo Dome cave: silty room, 22 May 2017, 1 female (sl 1.2 mm), RUMF-ZC- 6029 (HD 2017-107); same data as RUMF-ZC-6029, 1 male (sl 1.4 mm), RUMF-ZC-6030 (HD 2017-141).

Distribution. Ryukyu Islands (Ie Island and Okinawa Island) in southwestern Japan; 15–30 m (Komai et al. 2010; present study).

Habitat. Coral reefs; inside of a submarine cave about 10 m from the entrance (Komai et al. 2010).

Remarks. Catapaguroides longior was described by Komai et al. (2010) based only on the male holotype. The present material includes a first female of the species (sl 1.2 mm, RUMF-ZC-6029, HD2017-107; Fig. 1G).

The holotype has a small but distinct dorsomedian spine on the carpus of the right cheliped (cf. Komai et al. 2010: fig. 2 A, D). In the present material, the spine is prominent only in a female and it is minute or absent in other male specimens (Fig. 4H, J). Additionally, the ventrolateral distal angle of the carpus of the right cheliped is unarmed in the holotype, whereas it has a minute to small spine in the present material (Fig. 4H, J).

The fresh coloration superficially resembles between C. foresti and C. longior (Fig. 1D, F, G), but some morphological characters easily distinguish the two species. The ocular peduncles are comparatively longer and more slender in C. foresti than C. longior, and the corneas are conical in C. foresti rather than rounded in C. longior (Fig. 4A, B, E, F). In the right cheliped, the distomesial angle of the palm and the proximomesial margin of the dactylus have a small spine respectively in C. foresti, instead of being unarmed in C. longior, and the fixed finger is stouter in C. foresti than C. longior, particularly in males (Fig. 4C, D, G, I). The male sexual tube on the coxa of the right fifth pereopod is also much stouter and shorter in C. foresti than C. longior. (cf. McLaughlin 2002b: fig. 1H; Osawa & Takeda 2004: fig. 9F, as C. kasei; Komai et al. 2010: fig. 1I).