Paguristes longirostris Dana, 1852

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

Paguristes longirostris Dana, 1852

( Fig. 11A )

Paguristes longirostris Dana, 1852: 436 (type locality: East Indies); Nobili, 1903: 21; Alcock, 1905b: 36, pl. 1, fig. 5; Rahayu, 1996: 350; McLaughlin, 2002a: 392.

Material examined. 1 male, 6.4 mm, 2 ovigerous females, 5.8 mm, 6.4 mm, st. TB58, Around Tanah Merah, 1°16.808′N 103°58.246′E, mud, 38.7‒39.9 m, 24 May 2013; 1 male, 2.5 mm ( ZRC 1991.9679 ), Pulau Semakau ; 1 male, 9.5 mm ( ZRC 2021.0225 ), st. DW58, Pulau Semakau, 10 August 2010 .

Colour in life. Colour in general cream or cream with tinge of brown. Shield mottled yellowish tan or light brown; ocular peduncle light brown or dark orange, distal part bright orange, corneas yellow with black blotch medially; ocular acicle light brown or dark orange; ultimate segment and flagella of antennular peduncle light blue; antennal peduncle brown, flagellum blue; chelipeds cream, meri each with large blue spot on each lateral and mesial surfaces; P2 and P3 cream, dactyls with dark brown stripes distally and proximally, lateral surfaces of propodi each with longitudinal brown stripe medially, two stripes on carpi and meri ( Fig. 11A ).

Distribution. East coast of India, Andaman Sea off Phuket, Thailand, and Singapore; at depths of 30–40 m, in sandy mud substrate.

Remarks. The scale-like, imbricated tubercles on the chelipeds, and a large, rounded blue spot on lateral and mesial surfaces of the merus of the chelipeds immediately separate this species from other species in Paguristes .

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).