Catapaguroides longior Komai, Yamada & Shirakawa, 2010

Osawa, Masayuki & Fujita, Yoshihisa, 2019, Submarine cave hermit crabs (Crustacea: Decapoda: Anomura: Paguroidea) from three islands of the Ryukyu Islands, southwestern Japan, Zootaxa 4560 (3), pp. 463-482 : 470

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).

Figures

FIGURE 1. Entire animal, dorsal view. A, Aniculus retipes Lewinsohn, 1982, male (sl 11.9 mm), RUMF-ZC-6006 (IE141); B, Paguristes jalur Morgan, 1992, male (sl 5.4 mm), RUMF-ZC-6012 (IE69); C, Pseudopaguristes shidarai Asakura, 2004, male (sl 2.6 mm), RUMF-ZC-6020 (HD2017-140); D, Catapaguroides foresti McLaughlin, 2002, male (sl 2.0 mm), RUMFZC-6023 (IE173); E, Catapaguroides iejimensis Osawa & Takeda, 2004, male (sl 1.8 mm), RUMF-ZC-6026 (IE177); F, Catapaguroides longior Komai, Yamada & Shirakawa, 2010, male (sl 2.1 mm), RUMF-ZC-6027 (IE60); G, Catapaguroides longior Komai, Yamada & Shirakawa, 2010, female (sl 1.2 mm), RUMF-ZC-6029 (HD2017-107).

FIGURE 4. Catapaguroides foresti McLaughlin, 2002: male (sl 2.0 mm), RUMF-ZC-6023 (IE173) (A–C), male (sl 1.5 mm), RUMF-ZC-6024 (IE184) (D); Catapaguroides longior Komai, Yamada & Shirakawa, 2010: male (sl 2.1 mm), RUMF-ZC- 6028 (IE65) (E–H), female (sl 1.2 mm), RUMF-ZC-6029 (HD2017-107) (I, J). A, E, shield and ocular peduncles, dorsal view; B, distal part of right ocular peduncle, lateral view; C, D, G, I, right chela, dorsal view; F, left ocular peduncle, lateral view; H, J, carpus of right cheliped, dorsal view. Setae omitted from all illustrations. Scales equal 1.0 mm.