Clibanarius infraspinatus Hilgendorf, 1869

Rahayu, Dwi Listyo, 2022, Hermit crabs of Singapore (Crustacea: Decapoda: Anomura: Diogenidae, Paguridae), with description of two new species, Raffles Bulletin of Zoology 70, pp. 329-363 : 330

Clibanarius infraspinatus Hilgendorf, 1869

( Fig. 1A, B )

Clibanarius infraspinatus Hilgendorf, 1869: 97 (type locality: Singapore); Fize & Serène, 1955: 77, fig. 10; Rahayu, 1996: 336; McLaughlin et al., 2007: 113, unnumbered fig.; Malay et al., 2018: 33, fig. 2G.

Material examined. 1 male, not collected, st. SW33, Changi , 1°22.432′N 104°00.350′S, 18 October 2012 ; 1 female, 9.0 mm ( ZRC 2021.0101 ), Chek Jawa, 1 July 2009 ; 1 ovigerous female, not collected, st. SW156, St. John’s Island , 1°13.348′N 103°50.834′E, 3 June 2013 .

Colour in life. Shield cream, mottled with light and dark brown. Ocular peduncles whitish cream with dark brown longitudinal stripe on dorsal face, broader stripe proximally. Chelipeds greenish brown or dark brown with white spines and tubercles, dactyl and fixed finger light brown. P2 and P3 greenish brown or dark brown, each with light orange or tannish orange longitudinal stripe on dorsal and lateral faces extending from base of claw to proximal margin of merus ( Fig. 1A, B ).

Distribution. Widely distributed in the Indo-West Pacific, from the Red Sea, Indian Ocean, Indonesia, Singapore, North of Australia, Philippines, Vietnam, and Japan; intertidal.

Remarks. A common inhabitant of sandy mud substrates, sometimes also found in mangrove environment. Clibanarius infraspinatus is easily recognised by the longitudinal stripes on the ocular peduncles and P2 and P3, and the presence of a prominent spine on the ventral margin of the merus of the chelipeds.

Figures

Fig. 1. A, B, Clibanarius infraspinatus Hilgendorf, 1869, male, not collected; C, D, Clibanarius longitarsus (De Haan, 1849), female, 9.4 mm (ZRC 2021.0103).