Dwi Listyo Rahayu

• Senior Researcher at Research And Innovation Agency

In this study, four new species of land hermit crabs (Crustacea: Decapoda: Anomura: Coenobitidae: Coenobita Latreille, 1829) are described from Indonesia. These descriptions are based on evidence from morphological differences as well as mitochondrial 16S rDNA and cytochrome c oxidase subunit I data. Among the new species, Coenobita moluccensis n....

The taxonomy of the shallow water leucosiid crab, Lyphira heterograna (Ortmann, 1892), is revised on the basis of the lectotype and material from Japan, southern China, Hong Kong and Southeast Asia previously identified with this species. Six species are now recognised in the Lyphira heterograna species-group, of which four are new species: L. chom...

A new species of hermit crab from the genus Diogenes Dana, 1851 is described on the basis of a specimen from Papua, Indonesia. Diogenes hawisi n. sp. is distinguished from the closest allied species, D. edwardsii (De Haan, 1849) and D. laevicarpus Rahayu, 1996, by the shape and armature of the left cheliped. Morphological differences of these three...

The taxonomy of the pilumnid crab genus Lophoplax Tesch, 1918, is discussed. Lophoplax sculpta Stimpson, 1858) is redescribed and a neotype is selected in the interests of nomenclatural stability. Two new species allied to L. sculpta are described: L. sordida n. sp. from Indonesia, and L. pannosa n. sp. from Vanuatu. Pilumnus vermiculatus A. Milne-...

A new species of pinnotherid crab, Indopinnixa latimerus n. sp. is described on the basis of a female specimen from the island of Flores in Indonesia. This new species resembles I. oryza Naruse & Maenosono, 2012 in having a subovate carapace, without any protuberance on the lateral margin, and a distally expanded merus of the fourth ambulatory leg,...

Fitrian T, Madduppa H, Ismet MS, Rahayu DL. 2022. Taxonomy and molecular phylogeny analysis of the genus Diogenes "Edwardsii group" (Decapoda: Anomora: Diogenidae) based on mitochondrial DNA sequences. Biodiversitas 23: 5302-5313. Many variations of morphological characters differ from one species to another, showing high interspecific variation wi...

The coconut crab, Birgus latro (Linnaeus, 1767), the largest land arthropod in the world, is widely distributed on islands and atolls across the Indian and Pacific Oceans, but there is strong evidence that populations are declining in the face of anthropogenic threats. Here we review the data on population trends, habitat availability, distribution...

A new species of hermit crab, Diogenes matabiru, is described and illustrated on the basis of the specimens collected from mangrove environment in the eastern Lombok Island, Indonesia. This new species is related to D. pallescens Whitelegge, 1897 but differs in the shape of cheliped, telson and coloration in life. A key to the species of the genus...

A new hymenosomatid crab, Chartocinus rarus n. gen. n. sp., is described from coastal waters in western Papua (formerly Irian Jaya) in Indonesia. The new genus superficially resembles Amarinus Lucas, 1980, but can easily be distinguished by its subquadrate third maxillipeds with the merus produced along the anteroexternal edge, elongate ambulatory...

Tritodynamia nontjii n. sp. is described from Papua, Indonesia, and is distinguished from congeners by its proportionately broader carapace and relatively shorter ambulatory legs. The new species superficially resembles T. yeoi Naruse & Ng, 2010, from Singapore, in having the male first gonopod stout with the distal portion broad and curved, but th...

A small collection of pagurid hermit crabs, collected from coral reefs and marine caves on Christmas and Cocos (Keeling) Islands, Indian Ocean Territory of Australia, was studied. The following 11 species, including three new to science, were identified: At Christmas Island, where the major part of the collection was done, seven of the eight specie...

Setyadi G, Rahayu DL, Pribadi R, Hartati R, Wijayanti DP, Sugianto DN, Darmawan A. 2021. Crustacean and mollusk species diversity and abundance in the mangrove communities of Mimika District, Papua, Indonesia. Biodiversitas 22: 4146-4157. A mangrove crustacean and mollusk species diversity study was carried out in four mangrove estuaries in Mimika...

Two Southeast Asian species of Parasesarma De Man, 1895, P. indiarum (Tweedie, 1940) and P. foresti (Rahayu & Davie, 2002), have been reported to be morphologically and genetically very similar. Present comparisons of a range of material show the two species to be identical in male chelar dactylar tuberculation, pleon, and first gonopod characters,...

A new genus and new species of pilumnid crab, Ericiolumnus symbioticus (Decapoda: Brachyura), is described from the sponge Callyspongia Duchassaing & Michelotti, 1864 (Porifera: Callyspongiidae) in reefs in Lombok, Indonesia. The new taxon is characterized, among several characters, by the unusual shape of the carapace, which possesses sharp antero...

The taxonomy of the Indo-West Pacific rhizopine genus Typhlocarcinops Rathbun, 1909 (Pilumnidae) is revised and 22 species are recognised. The identification of these small, soft sediment-dwelling crabs has been difficult because many of the types have never been figured and described to modern standards. The identity of the type species, T. canali...

As a part of regular benthic monitoring program in the fragmented brackish-water habitats of Kochi (Cochin), Kerala, India, several specimens of Neorhynchoplax alcocki (Kemp 1917) and Neorhynchoplax demeloi (Kemp 1917) were collected. Description and illustration of male G1 and color shortly after preservation, habitat and its ecological environmen...

Elamenopsis gracilipes n. sp. is described from Papua, Indonesia, and is easily distinguished from congeners by its relatively longer and more slender ambulatory legs, with the merus of the third ambulatory leg almost seven times as long as broad. The new species superficially most closely resembles E. lineata A. Milne-Edwards, 1873, in having male...

Kepulauan Seribu is located in the north of Jakarta and has historically been affected by anthropogenic activities. Based on its anthropogenic pressure, the archipelago is divided latitudinally into three main parts; the southern part, is a collection of islands located closest to Jakarta Bay and characterized by poor water quality, large sediment...

A little known littoral hermit crab, Clibanarius clibanarius (Herbst, 1791), is redescribed on the basis of material from southern India, supplemented by the photographs of the type material. The species appears closest to C. infraspinatus Hilgendorf, 1869, but the absence of a prominent ventral spine or protuberance on the cheliped meri immediatel...

A small collection of majoid spider crabs of the genus Paratymolus Miers, 1879, s.l from Lombok Island, Indonesia contains four species namely P. hastatus Alcock (1895), P. coccus Loh & Ng (1999), P. cygnus Loh & Ng (1999), and Litosus sexspinosus (Miers, 1884). Except for L. spinosus, the three other species are new records for Indonesia. Paratymo...

The identity of the tree-spider crab, Parasesarma leptosoma (Hilgendorf, 1869) (family Sesarmidae), which is believed to be widely distributed in the Indo-West Pacific, is reassessed and shown to be a species-complex with nine species, seven of which are here described as new. Parasesarma leptosoma sensu stricto is now restricted to South and East...

For 130 years the diogenid genus Paguropsis Henderson, 1888 was considered monotypic for an unusual species, P.typica Henderson, 1888, described from the Philippines and seldom reported since. Although scantly studied, this species is known to live in striking symbiosis with a colonial sea anemone that the hermit can stretch back and forth like a b...

A new diogenid hermit crab with bright-white chelae, Diogenes albimanus n. sp., is described and illustrated, based on a single ovigerous female collected from KwaZulu-Natal, South Africa. The new species is compared to morphologically similar species, in particular to D. holthuisi and D. dorotheae, from which it is distinguishable by the shape and...

Hexapus timika Rahayu & Ng, 2014 is redescribed based on newly collected male and female specimens from Papua, Indonesia. Three new species from Jakarta Bay and Sunda Strait, Indonesia, are added to the genus Mariaplax, the richest genus in the family Hexapodidae, hitherto having 14 species. Mariaplax pitrai n. sp. has the carapace covered by small...

The PANGLAO 2004 expedition in the central Visayas region of the Philippines revealed the occurrence of 43 species of diogenid hermit crabs of the genera Calcinus, Clibanarius, and Dardanus in the Philippines. Using morphological, colour pattern, and mitochondrial DNA evidence, the Dardanus lagopodes (Forskål, 1775) complex is revised with the vali...

Lithoselatium kusu Schubart, Liu and Ng, 2009 previously known from Singapore and surrounding areas, in this paper reported for the first time from Indonesia. The specimens for this study were collected from under rocks and coral rubble around mangrove areas in Lingga, Indonesia. The morphological characteristics and differences of the three known...

The male of Chinommatia littoralis (Tesch, 1918) is described for the first time based on material from Tanimbar Island, Indonesia. The structure of the male first and second gonopods are distinct and more closely resemble those of Notopelta mortenseni (Serène, 1964), but the species is retained in Chinommatia Ng & Castro, 2016, because of the stru...

A new genus and new species of pinnotheroid crab of the family Aphanodactylidae, Ankerius aenigmaticus n. sp., is described from the Red Sea coast of Saudi Arabia. The genus is unusual among aphanodactylids in possessing more gaping third maxillipeds, strongly spiniform chelipeds and ambulatory legs, as well as a relatively longer ambulatory dactyl...

A specimen of Parasesarma raouli (Crustacea: Brachyura: Sesarmidae) was collected from the mangrove area of Pulau Berang, Lingga, Riau Archipelago, Indonesia in Oktober 2014. This species previously was known only from Johor strait, Peninsular Malaysia. Its color in life is recorded for the first time.

The taxonomy of the Indo-West Pacific aphanodactylid crabs Selwynia sibogae (Tesch, 1918) and S. edmondsoni (Rathbun, 1932) is discussed on the basis of the types, and both species are redescribed and figured. Two new species from Papua New Guinea and French Polynesia respectively, are described and compared with congeners. All are symbionts in pol...

A new species of land hermit crab in the genus Coenobita Latreille, 1829 from Singapore, Malaysia and Indonesia, previously confused with C. cavipes Stimpson, 1858 (Crustacea: Decapoda: Anomura: Coenobitidae) Abstract. A new species of land hermit crab in the genus Coenobita Latreille, 1829 (Anomura: Coenobitidae), C. lila, is described from Singap...

A new species of hermit crab, Diogenes singaporensis, is described based on material from Pulau Ubin, East Johor Strait, Singapore. This new species resembles D. goniochirus Forest, 1956 in having a distal protuberance or elongated ridge each on the outer surface of the palm and the carpus of the left cheliped, but easily distinguished by the prese...

The male of Hexapinus latipes (De Haan, 1835), so far known only from female specimens, is described based on the material reported by De Man (1888) as "Hexapus sexpes". Material referred to "Hexapus sexpes" by Tesch (1918) is shown instead to belong to Hexapinus simplex Rahayu & Ng, 2014, and Hexapinus latus Rahayu & Ng, 2014, while his "Hexaplax...

Several rare or uncommon, mostly infaunal decapod crustaceans are reported from intertidal and shallow subtidal habitats of Lombok, Indonesia. The alpheid shrimps Alpheus angustilineatus Nomura & Anker, 2005, Athanas shawnsmithi Anker, 2011, Jengalpheops rufus Anker & Dworschak, 2007, Salmoneus alpheophilus Anker & Marin, 2006, Salmoneus colinorum...

Although Pagurus Fabricius, 1775 is the most species-rich genus in the hermit crab family Paguridae, only two species of the genus, P. hirtimanus (Miers, 1880) and P. spinulentus (Henderson, 1888), were heretofore known from the Philippines. In this paper, 10 species of the genus, including eight firstly recorded from the Philippines, are reported...

The species-group name Pagurus longitarsus was proposed by De Haan (1849: 211, pl. 50, fig. 3) for a species of hermit crab collected from Japan (see Yamaguchi & Baba 1993: 272, 273). Dana (1852b: 464) transferred Pagurus longitarsus to the genus Clibanarius Dana, 1852 (first established in Dana 1852a). Dana (1852b: 464) also suggested that Pagurus...

The family Acidopsidae Števčić, 2005, is revised; and two subfamilies are recognised. The Acidopsinae Števčić, 2005, is characterised by the coxal male opening, a quadrate basal antennal article and vulvae arranged near the median longitudinal thoracic sternal groove. Three genera are included in the Acidopsinae: Acidops Stimpson, 1871 (with two sp...

The hexapodid genera Hexapus De Haan, 1833, Hexapinus Manning & Holthuis, 1981, Latohexapus Huang, Hsueh & Ng, 2002, and Hexaplax Doflein, 1904, are revised and redescribed on the basis of their respective type species. Hexapus s. str. is redefined and a new species is described from Indonesia. Hexapinus is restricted for H. latipes (De Haan, 1835)...

The pagurid hermit crab genus Pseudopagurodes McLaughlin, 1997, contains two described species, P. piliferus (Henderson, 1888) and P. reconditus (Wang & McLaughlin, 2000). In this study, two additional new species of the genus are described from the Philippines based on material collected by the PANGLAO 2004 Marine Biodiversity Project. Pseudopagur...

Two new species of the pagurid genus Pylopaguropsis Alcock, 1905 are described and illustrated from the Bohol Sea, the Philippines. Pylopaguropsis pygmaeus, new species, resembles P. keiji McLaughlin & Haig, 1989, P. lemaitrei Asakura & Pauly, 2003, P. lewinsohni McLaughlin & Haig, 1989 and P. zebra (Henderson, 1893) in sharing appreciably dissimil...

The pagurid genus Decaphyllus de Saint Laurent, 1968 was represented by five species prior to this study. In this work, six new species of the genus are described and illustrated on the basis of material mainly collected by the PANGLAO 2004 Marine Biodiversity Project, carried out in Bohol, the Philippines, supplemented by a small collection from J...

Parasesarma jamelense (Rathbun, 1914), a poorly known species, is redescribed, and a closely related and new species, P. cognatum, is described. Parasesarma cognatum, new species, can be separated from P. jamelense by the different shape and slightly greater number of the dactylar tubercles on the male cheliped, relatively longer walking legs and m...

Two species of the pagurid hermit crab genus Lophopagurus McLaughlin, 1981 are reported herein. Lophopagurus (Lophopagurus) minimus n. sp., described on the basis of two females from Tuamotu Archipelago, French Polynesia, appears closest to L. (L.) nanus (Henderson, 1888), but is easily distinguished from the latter by the different shape of the oc...

The pagurid hermit crab genus Pagurixus Melin, 1939, is widely distributed in shallow waters in tropical to warm temperate seas in the Indo-West to Central Pacific. This study deals with a collection made during the PANGLAO 2004 Marine Biodiversity Project. Nine species of the genus were identified, including one new to science: P. concolor Komai &...

Ten species of the pagurid genus Catapaguroides A. Milne-Edwards & Bouvier, 1892, including eight new to science, are reported from the Bohol Sea, the Philippines, collected by the PANGLAO 2004 Marine Biodiversity Project: C. brevidactylus, new species; C. conicus, new species; C. crassimanus, new species; C. cristimanus de Saint Laurent, 1968; C....

Hermit crabs fauna of the family Diogenidae in the Kume Island, south Japan, were found to consist of 49 species, of which 47 species were collected during the KUMEJIMA 2009 Expedition. Of the 49 species collected, 20 species, Calcinus seurati Forest, 1951; Ciliopagurus krempfi (Forest, 1952), Clibanarius corallinus H. Milne Edwards, 1848; Clibanar...

A new hermit crab species of the family Diogenidae, Diogenes takedai sp. nov., is described from sea grass beds of Lombok Island, Indonesia. The new species appears closest to D. tirmiziae Siddiqui & McLaughlin, 2003, in having banded ocular peduncles and pereopods and similar armatures of the antennal peduncle and left chela, but is distinguished...

Fourteen species of MacrophthalmusDesmarest, 1823, are reported from Indonesia, of which two species, Macrophthal-mus(Macrophthalmus) abbreviatusManning & Holthuis, 1981, and M. (Macrophthalmus) sulcatus malaccensisTweedie, 1937, are recorded for the first time from the region, and one new species M. (Mareotis) fusculatus n. sp. is described. The n...

A new species of Notonyx A. Milne-Edwards, 1873 (Crustacea: Decapoda: Brachyura: Goneplacidae) is described from Maluku, Indonesia and differs from closely related species, N. latus Ng & Clark, 2008 and N. sagittifer Ng & Clark 2010, in that the male abdomen is relatively narrower and the tip of the male second gonopod is sickled-shaped.

Annotated checklists of the world's Recent anomuran crustacean superfamilies Aegloidea, Hippoidea, Lithodoidea, Lomisoidea, Paguroidea and galatheoid family Porcellanidae are presented. Each is accompanied by brief reviews of the historical aspects of its classification, general external morphology, features of larval development and current phylog...

Perisesarma maipoense (Soh, 1978) previously considered endemic to Hong Kong and Macau, is recorded from northern Vietnam, and redescribed based on a paratype and Vietnamese specimens. Perisesarma maipoense is characterized by a row of 5–8 fl attened, indistinct tubercles on the dorsal surface of the dactyl of the cheliped. This species prefers mud...

Four species of Notonyx A. Milne-Edwards, 1873, are reported from the Lesser Sunda and Muluku islands in Indonesia. Notonyx castroi n. sp. is characterised by its distinctive male first gonopod, N. gigacarcinicus Clark & Ng, 2006, originally described from western Thailand, is recorded only for the second time, while Banda and Seram are new Indones...

Four species of Notonyx A. Milne-Edwards, 1873, are reported from the Lesser Sunda and Muluku islands in Indonesia. Notonyx castroi n. sp. is characterised by its distinctive male first gonopod, N. gigacarcinicus Clark & Ng, 2006, originally described from western Thailand, is recorded only for the second time, while Banda and Seram are new Indones...

Two species of Paguristes Dana, 1851 occurring in New Zealand waters, P. pilosus H. Milne Edwards, 1836 and P. setosus H. Milne Edwards, 1848, were the sources of errors and considerable confusion for many years. The misunderstanding regarding the identities of these taxa was further compounded by Filhol (1885) when he published a description of P....

Two new species of pinnotherid crabs of the genus Indopinnixa Manning & Morton, 1987, are described from the island of Lombok, Indonesia. Indopinnixa kasijani n. sp. and I. moosai n. sp. differ from the two known congeners, I. sipunculana Manning & Morton, 1987, and I. mortoni Davie, 1992, by their proportionately wider and smoother carapaces, and...

Two new species of pinnotherid crabs of the genus Indopinnixa Manning & Morton, 1987, are described from the island of Lombok, Indonesia. Indopinnixa kasijani n. sp. and I. moosai n. sp. differ from the two known congeners, I. sipunculana Manning & Morton, 1987, and I. mortoni Davie, 1992, by their proportionately wider and smoother carapaces, and...

The mangrove sesarmid crabs of the Parasesarma plicatum species-group are revised, and four distinct taxa are recognized: Parasesarma plicatum (Latreille, 1803), P. affine (De Haan, 1837), P. ungulatum (H. Milne Edwards, 1853), and P. dumacense (Rathbun, 1914). These four species are easily distinguished from congeners by the number of dactylar tub...

The mangrove sesarmid crabs of the Parasesarma plicatum species-group are revised, and four distinct taxa are recognized: Parasesarma plicatum (Latreille, 1803), P. affine (De Haan, 1837), P. ungulatum (H. Milne Edwards, 1853), and P. dumacense (Rathbun, 1914). These four species are easily distinguished from congeners by the number of dactylar tub...

A new species of marine hermit crabs, Dardanus holthuisi sp. nov., is described from New Caledonia and Vanuatu. This is one of the few species of Dardanus that live at depths of more than 100 m. This new species resembles D. gemmatus (H. Milne Edwards, 1848) and D. impressus (De Haan, 1849), but is easily distinguished from those two species by lar...

A new species of goneplacid crab of the genus Notonyx A. Milne-Edwards, 1873, is described from Lombok, Indonesia. The new species, n. Guinotae, resembles N. kumi Naruse & Maenosono, 2009, but differs in having a relatively more slender male abdomen, proportionately longer ambulatory legs, as well as male first and second gonopods that are differen...

Three species of camptandriid crabs (Crustacea: Brachyura: Ocypodoidea) are reported from Iraq: Tylodiplax indica Alcock, 1900, Manningis arabicum (Jones & Clayton, 1983) and Nasima dotilliformis (Alcock, 1900), all new records for the country. The taxonomy of the three species is treated in detail. Tylodiplax indica Alcock, 1900, is here referred...

Three species of camptandriid crabs (Crustacea: Brachyura: Ocypodoidea) are reported from Iraq: Tylodiplax indica Alcock, 1900, Manningis arabicum (Jones & Clayton, 1983) and Nasima dotilliformis (Alcock, 1900), all new records for the country. The taxonomy of the three species is treated in detail. Tylodiplax indica Alcock, 1900, is here referred...

Fourteen species of Paguristes were collected in the Philippines during the expeditions MUSORSTOM 1 (1976), 2 (1980), 3 (1985), and PANGLAO (2004). Among the species collected, two are recognized as new, Paguristes aulacis n. sp., characterized by a longitudinal sulcus on the lateral surface of the carpi of the chelipeds, and P. macrops n. sp., eas...

Two new species of sesarmid crabs of the genus Parasesarma De Man, 1895, are described from mangrove forests in Southeast Asia. Parasesarma paucitorum n. sp. is described from northern Sulawesi and is allied to P. leptosoma (Hil-gendorf, 1869) but differs from the latter in the form of its carapace, leg proportions, the structure of the tubercles o...

Two new species of sesarmid crabs of the genus Parasesarma De Man, 1895, are described from mangrove forests in Southeast Asia. Parasesarma paucitorum n. sp. is described from northern Sulawesi and is allied to P. leptosoma (Hilgendorf, 1869) but differs from the latter in the form of its carapace, leg proportions, the structure of the tubercles on...

FIGURE 1. Parasesarma paucitorum n. sp. A, B, overall dorsal views; C, ventral view of carapace. A, holotype male (19.7 x 17.8 mm) (MZB); B, C, paratype male (15.5 x 13.6 mm) (ZRC 2008.0869). Both specimens from northern Sulawesi, Indonesia.

FIGURE 5. Parasesarma raouli n. sp. Holotype male (7.1 x 5.6 mm) (ZRC 1973.11.3.6), Kuantan, Pahang, Peninsular Malaysia. A, overall dorsal view; B, thoracic sternum and abdomen; C, frontal regions; D, outer view of right chela; E, dorsal view of dactylus of right chela showing tubercles.

FIGURE 6. Parasesarma raouli n. sp. Holotype male (7.1 x 5.6 mm) (ZRC 1973.11.3.6), Kuantan, Pahang, Peninsular Malaysia. A, B, left G 1 s (denuded); C, abdomen. Scales = 1.0 mm.

FIGURE 2. Parasesarma paucitorum n. sp. A, frontal view of carapace; B, C, outer views of left chelae. A, B, paratype male (15.5 x 13.6 mm) (ZRC 2008.0869); C, holotype male (19.7 x 17.8 mm) (MZB). Both specimens from northern Sulawesi, Indonesia.

FIGURE 4. Parasesarma paucitorum n. sp. Holotype male (19.7 x 17.8 mm) (MZB), northern Sulawesi, Indonesia. A – D, left G 1 s (denuded); E, abdomen. Scales = 1.0 mm.

FIGURE 3. Parasesarma paucitorum n. sp. Holotype male (19.7 x 17.8 mm) (MZB), northern Sulawesi, Indonesia. A, overall dorsal view; B, thoracic sternum and abdomen; C, frontal regions; D, outer view of left chela; E, dorsal view of dactylus of left chela showing tubercles.

Two new species of Pseudopaguristes, P. mclaughlinae and P. pachydactylus are described from the southwestern Pacific. Both species have tuberculate spines that cover the mesial faces of the dactyls of the chelipeds, a character shared with P. hians (Henderson, 1888) and P. asper Rahayu, 2005. Pseudopaguristes mdaughlinae n. sp. differs from the tw...

Additional materials of two species of the recently described pagurid genus Pteropagurus McLaughlin & Rahayu, 2006 have required an emendation of the genus. These have also provided the information needed to supplement the original species descriptions, including the unusual morphology of the male of P. spina McLaughlin & Rahayu, 2006 and the sexua...

Pseudopagurodes piliferus (Henderson, 1888), heretofore known only from its female holotype, is redescribed and illustrated based on recent collections, and an error in the stated type locality is corrected. Additionally, a superficially very similar species, previously assigned to the genus Nematopaguroides, N. reconditus Wang & McLaughlin, 2000,...

A small collection of Paguristes Dana, 1851 s.l. from the western Indian Ocean in the Muséum national d'Histoire naturelle, Paris, contains five species of Paguristes s.s., two of Stratiotes Thomson, 1899, and two of Pseudopaguristes McLaughlin, 2002. Except for Paguristes lauriei McLaughlin & Hogarth, 1998, and Stratiotes abbreviatus (Dechancé, 19...

Paguristes balanophilus Alcock, 1905, a species mistakenly included in the Japanese paguroid fauna, is redescribed and illustrated from material discovered amongst the collections of the Muséum national d'Histoire naturelle, Paris, and the Natural History Museum, London. A lectotype is designated and the species distribution is restricted to Arabia...

A new genus, Pteropagurus, is proposed for two new species of hermit crabs that are described and illustrated herein. These species, Pteropagurus inermis n. sp. and P. spina n. sp. are unique in that their shelter of choice is empty pteropod mollusk shells. The taxon can be categorized as a deep-waters genus, with a bathymetric range of 285 to 700...

A new genus, Pteropagurus, is proposed for two new species of hermit crabs that are described and illustrated herein. These species, Pteropagurus inermis n. sp. and P. spina n. sp. are unique in that their shelter of choice is empty pteropod mollusk shells. The taxon can be categorized as a deepwaters genus, with a bathymetric range of 285 to 700 m...

Two new species of Neosarmatium, N. papuense n. sp. and N. bidentatum n. sp., are described from mangrove environments in the Timika region, Papua, Indonesia. Neosarmatium papuense n. sp. is characterized by the presence of two chitinous teeth, and one non-chitinous tooth, closely set proximally on the dorsal surface of the dactyl of the cheliped....

A new species of the hermit crab genus Paguristes, sensu stricto, Paguristes alcock n. sp., is described and illustrated from materials collected in Australia, Indonesia and the Philippine Islands. It is proposed that this taxon, or a species identified simply as Paguristes sp. by Lewinsohn (1969) in his monograph of Red Sea Anomura, may be conspec...

A new species of the hermit crab genus Paguristes, sensu stricto, Paguristes alcock n. sp., is described and illustrated from materials collected in Australia, Indonesia and the Philippine Islands. It is proposed that this taxon, or a species identified simply as Paguristes sp. by Lewinsohn (1969) in his monograph of Red Sea Anomura, may be conspec...

An in-depth study of the genera Paguristes Dana, 1851 and Pseudopaguristes McLaughlin, 2002 in Indonesian waters has resulted in refined hypotheses of some of the evolutionary trajectories within the Paguroidea. Not only has the observed reduction in pleurobranch and arthrobranch number in three species, Paguristes hians Henderson, 1888, P. kuekent...