Diogenidae Ortmann, 1892

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 : 465

Family Diogenidae Ortmann, 1892

Aniculus retipes Lewinsohn, 1982

( Fig. 1A )

Aniculus retipes Lewinsohn, 1982: 76, figs. 1, 2 (type locality: Mersa Bereika, Sinai Peninsula).— Forest 1984: 51, figs. 13, 20, 51–58.—McLaughlin et al. 2007: 103, 2 unnumbered figs.— Poupin et al. 2013: 26, fig. 13B.

Material examined. Ie Island, unnamed submarine cave: entrance, roof, 23 June 2017, 1 male (sl 11.9 mm), RUMF-ZC-6006 (IE141). Okinawa Island, Hedo Dome cave: entrance, 5 m from entrance, roof , 10 August 2016 , 1 male (sl 9.1 mm), RUMF-ZC-6007 ( HD 2016-47); entrance, 5 m from entrance, rocks, 10 August 2016, 1 male (sl 7.1 mm), RUMF-ZC-6008 ( HD 2016-49); main tube, 21 May 2017, 1 female (sl 17.0 mm), RUMF-ZC-6009 (HD 2017-83); same data as RUMF-ZC-6009 , 1 male (sl 13.6 mm), RUMF-ZC-6010 (HD 2017-94). Shimoji Island, Akuma-no-Yakata cave: middle zone, roof , 6 February 2017 , 1 female (sl 12.7 mm), RUMF-ZC-6011 ( SH 55).

Distribution. Wide ranging in the Indo-West Pacific: Red Sea, eastern Africa ( Tanzania), Glorioso Islands, Christmas Island, Cocos (Keeling) Islands, Indonesia, Vietnam, Taiwan, Japan, eastern Australia, Solomon Islands, Wallis, Futuna, Samoa, and French Polynesia; 0–35 m (McLaughlin et al. 2007; Poupin et al. 2013; present study).

Habitat. Coral and rocky reefs ( Nomura et al. 1996; Poupin et al. 2013).

Remarks. Two species of the genus Aniculus Dana, 1852, A. maximus Edmondson, 1952 and A. retipes, have been recorded from submarine caves in the Ryukyu Islands ( Rahayu & Osawa 2012; Osawa & Fujita 2016; Table 2). In general, A. retipes is more commonly found in cryptic environments of coral reefs than A. maximus.

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).