Diogenes tumidus Rahayu & Forest, 1995

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 : 350

Diogenes tumidus Rahayu & Forest, 1995

( Fig. 9D )

Diogenes tumidus Rahayu & Forest, 1995: 402 , fig. 5 (type locality: Sorong, Papua, Indonesia); Rahayu, 1996: 349; McLaughlin, 2002a: 420, fig. 4D–F; McLaughlin et al., 2007: 142, unnumbered figures.

Material examined. 14 males, 2.0– 2.9 mm ( ZRC 2021.0221 ), st. IT140, Tekukor , 1°13.899′N 103°50.265′E, hand collecting, intertidal, 31 May 2013 ; 2 males, 1.3–1.8 mm, 2 ovigerous females, 1.8 mm ( ZRC 2021.0222 ), st. SW50, St John’s Island , 1°13.21′N 103°50.46′E, rubble beach, 23 May 2013 ; 1 male, 2.5 mm ( ZRC 2021.0223 ), Chek Jawa, 1 July 2009 ; 1 male, 2.5 mm, st. SW117, St John’s Island north lagoon, 1°13.116′N 103°51.079′E, 30 May 2013 ; 8 males, 2.4–3.5 mm ( MZB Cru 5220), Pulau Semakau , 11 September and 9 October 2010 .

Colouration in life. Shield mottled with light brown and cream with dark brown spot medially; ocular peduncle creamy white with dark brown streak proximal to corneas to proximal part, corneas dark grey with reddish brown streak at base. Chelipeds generally light brown with dark brown streak on dorsolateral surface of palm and carpus, spines white. P2 and P3 light brown or cream with dark brown streak on dorsolateral margin of dactyls, propodi and carpi ( Fig. 9D ).

Distribution. Thailand, Singapore, Indonesia; intertidal to shallow subtidal; occurring in sandy and rubble beaches.

Figures

Fig. 9. A, B, Diogenes inglei McLaughlin & Clark, 1997, ovigerous female, 1.8 mm (ZRC 2021.0201); C, Diogenes pallescens Whitelegge, 1897, male, not collected, st. SD40, West P. Semakau, 1°12.389′N 103°45.24′E, 23 May 2013; D, Diogenes tumidus Rahayu & Forest, 1995, male, not collected, SW53, Seringat Kias, artificial lagoon, 1°13.630′N 103°51.218′E, 24 May 2013.