Hermit crabs of Singapore (Crustacea: Decapoda: Anomura: Diogenidae, Paguridae), with description of two new species Author Rahayu, Dwi Listyo text Raffles Bulletin of Zoology 2022 2022-05-31 70 329 363 journal article 10.26107/RBZ-2022-0017 2345-7600 7174641 6A65DD81-A22F-4901-8B2A-029695E4AB43 Diogenes spinicarpus Rahayu & Forest, 1995 Diogenes spinicarpus Rahayu & Forest, 1995: 406 , figs. 6a–f, 7a–h ( type locality: Tanjung Tiram , Ambon , Indonesia ). Material examined. 1 male , 1.6 mm ( MZB Cru 5219), Pulau Hantu , dive, 7–10 m , 16 December 2012 ; 1 male , 1.3 mm ( ZRC 2021.0219 ), st. SD143, east of Pulau Hantu , dive, 12 m , 13 May 2013 ; 1 male , 2.2 mm ( ZRC 2021.0220 ), Pulau Semakau , near mangrove, 10 November 2011 . Distribution. Indonesia , Singapore ; 0–10 m , in sandy substrate. Remarks. Among the species of the Diogenes pallescens group, D. spinicarpus is recognisable by the short fourth segment of the antennal penduncles armed with a strong spine on the dorsodistal margin, the slender antennal acicles bearing two or three spines mesially, and the proximally inflated ocular peduncle with a similar dilated cornea. The specimens examined in this study agree well with the original description by Rahayu & Forest (1995) except for the right cheliped that has a prominent hiatus between dactyl and fixed finger. This species is recorded for the first time in Singapore waters.