Pseudopaguristes monoporus (Morgan, 1987)

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 : 351-352

Pseudopaguristes monoporus (Morgan, 1987)

( Fig. 11B )

Paguristes monoporus Morgan, 1987a: 379 , figs. 1–3 (type locality: Port Essington, Australia); Haig & Ball, 1988: 173; Jones & Morgan, 2002: 122, 1 unnumbered fig.

Paguristes hians: Grant & McCulloch, 1906: 33 (in part); McCulloch, 1913: 346. (Not Paguristes hians Henderson, 1888 ).

Pseudopaguristes monoporus: Rahayu, 2005: 27 ; McLaughlin, 2007a: 264, fig. 27.

Material examined. 1 male, 3.6 mm ( ZRC 2021.0229 ), st. SB56, South Pulau Jong , 1°12.55′N 103°47.2′E, 17 m, 24 May 2013 ; 1 male, 2.4 mm, 1 female, 2.0 mm ( ZRC 2021.0230 ), st. SB67, Pulau Hantu , western patch reef, 1°13.6′N 103°44.8′E, 15.7 m, 25 May 2013 ; 1 male, 4.0 mm ( ZRC 2021.0231 ), st. SW89, small Sister’s Island , 1°12.9′N 103°49.88′E, 14.7 m, 27 May 2013 ; 3 males, 2.5–3.8 mm, 5 females, 2.5–4.0 mm, 1 ovigerous female, 2.5 mm ( ZRC 2021.0232 ), st. IT93, Pulau Jong, 1°12.901′N 103°47.194′E, 28 May 2013 ; 1 male, 2.5 mm, 1 female, 2.7 mm ( ZRC 2021.0233 ), st. IT108, Raffles Lighthouse, 29 May 2013 ; 1 specimen in shell, st. DR112, South of Sister’s Island , 1°12.024′N 103°50.170′E, broken shell and coral rubble, 33.6‒34.4 m, 29 May 2013 ; 1 male, 3.1 mm, 1 female, 3.6 mm, 2 ovigerous females, 2.5–2.9 mm ( ZRC 2021.0234 ), st. SD150, Kusu Island , 01°13.274′N 103°51.659′E, 10.7 m, 1 June 2013 ; 1 male, 3.8 mm ( ZRC 2021.0235 ), st. SD167, Pulau Jong , 01°12.902′N 103°47.142′E, 15.4 m, 4 June 2013 ; 1 male, 4.0 mm ( ZRC 2021.0230 ), P. Jong , dive, 6 m, 15 September 2013 .

Colouration in life. Shield mottled with light brown and cream, with two dark brown spots posteriorly; ocular peduncles generally cream with red longitudinal stripes on dorsal, mesial, and lateral surfaces; basal and penultimate segments of antennular peduncle brownish blue, ultimate segment blue, flagellum orange. Chelipeds generally yellowish tan, dactyl and palm mottled with dark and light brown, spines white, carpus and merus with large dark brown streak distally. P2 and P3 also generally yellowish tan, lateral face of dactyl, propodi and carpi with brown irregular, longitudinal stripe on midline and on dorsal surface, and with dark brown streak proximally ( Fig. 11B ).

Distribution. Australia, Indonesia, Singapore; intertidal to 20 m deep, on sand, gravel, coral rubble substrates.

Remarks. This is a very common species in local waters and easily recognisable by the dark red stripes on the ocular peduncles, and the dense, plumose setae on the proximal part of cephalic appendages.

Figures

Fig. 11. A, Paguristes longirostris Dana, 1852, ovigerous female, 6.4 mm (ZRC 2021.0224); B, Pseudopaguristes monoporus (Morgan, 1987), male, 3.8 mm (ZRC 2021.0235).