taxonID	type	description	language	source
039387ECAF58FF8CFC8A2E5E8E4DFB6F.taxon	type_taxon	[Type species: Cyclodorippe (Cyclodorippe) rostrata Ihle, 1916]	en	Islam, Atikul, Banerjee, Abhishek, Wati, Sisca Meida, Banerjee, Sumita, Shrivastava, Deepti, Srivastava, Kumar Chandan (2022): Crabs (Crustacea, Decapoda) from the Sea off East and Southeast Asia Collected by the RV Hakuhō Maru (KH- 72 - 1 Cruise) 2. Timor Sea. Bulletin of the National Museum of Nature and Science. Series A, Zoology 48 (1): 5-24, DOI: 10.50826/bnmnszool.48.1_5, URL: http://dx.doi.org/10.4103/jpbs.jpbs_1287_23
039387ECAF58FF8EFD742EF98815FF16.taxon	description	(Fig. 1 A – B) Material examined. RV Hakuhō Maru KH- 72 - 1 cruise, sa. 33 (Off Sahul Shelf; 12 ° 42.2 ′ S, 123 ° 07.6 ′ E – 12 ° 42.0 ′ S, 123 ° 08.5 ′ E, 535 – 547 m depth), 3 m beam trawl; June 26, 1972; 1 ♂ (NSMT-Cr 29246: CB 4.4 mm, CL 4.4 mm including rostrum), 1 ♀ (NSMT-Cr 29247: CB 5.1 mm, CL 4.8 mm). Remarks. In both specimens examined, all of the chelipeds and ambulatory legs are missing (Fig. 1 A – B), and, therefore, the identification is based only on carapace morphology, particularly the spinulation of the dorsal surface and lateral margins, and the length, width and armature of the rostrum. The identification follows the key prepared by Tavares (1993) who examined the type specimens of two close species, Krangalangia rostrata (Ihle, 1916) and K. spinosa (Zarenkov, 1970), both of which were originally referred to the genus Cyclodorippe A. Milne-Edwards, 1880 and transferred to the new genus Krangalangia by Tavares (1992). According to Tavares (1993) who validated K. spinosa in opposition to the opinion of Takeda and Moosa (1990), K. rostrata differs from K. spinosa in having the rostrum distinctly narrower and constricted at its base, and the external orbital spine directed nearly forward, instead of obliquely outward as in K. spinosa. Both specimens examined agree in carapace shape with the male of K. spinosa from the Ryukys recorded by Takeda and Komatsu (2020). Distribution. Australia, the Chesterfield Islands, New Caledonia, the Wallis and Futuna Islands, the Philippines and the Ryukyu Islands, 479 – 1223 m depth. This species was listed as an Australian species by Davie (2002) and recorded, with a photograph, from eastern Australia, 1053 m depth, by Farrelly and Ahyong (2019).	en	Islam, Atikul, Banerjee, Abhishek, Wati, Sisca Meida, Banerjee, Sumita, Shrivastava, Deepti, Srivastava, Kumar Chandan (2022): Crabs (Crustacea, Decapoda) from the Sea off East and Southeast Asia Collected by the RV Hakuhō Maru (KH- 72 - 1 Cruise) 2. Timor Sea. Bulletin of the National Museum of Nature and Science. Series A, Zoology 48 (1): 5-24, DOI: 10.50826/bnmnszool.48.1_5, URL: http://dx.doi.org/10.4103/jpbs.jpbs_1287_23
039387ECAF5AFF8EFF252B2B8860FE52.taxon	type_taxon	[Type species: Cymonomus quadratus A. Milne-Edwards, 1880]	en	Islam, Atikul, Banerjee, Abhishek, Wati, Sisca Meida, Banerjee, Sumita, Shrivastava, Deepti, Srivastava, Kumar Chandan (2022): Crabs (Crustacea, Decapoda) from the Sea off East and Southeast Asia Collected by the RV Hakuhō Maru (KH- 72 - 1 Cruise) 2. Timor Sea. Bulletin of the National Museum of Nature and Science. Series A, Zoology 48 (1): 5-24, DOI: 10.50826/bnmnszool.48.1_5, URL: http://dx.doi.org/10.4103/jpbs.jpbs_1287_23
039387ECAF5AFF8EFF1E2BD38E50FD0E.taxon	description	(Fig. 1 C – D) Material examined. RV Hakuhō Maru KH- 72 - 1 cruise, sta. 26 (Timor Sea; 09 ° 27.0 ′ S, 127 ° 58.6 ′ E — 09 ° 28.5 ′ S, 127 ° 56.1 ′ E, 610 – 690 m depth), 3 m beam trawl; June 19, 1972; 1 ♀ (NSMT-Cr 29248: CB 7.9 mm, CL 8.1 mm including rostrum). Remarks. The genus Cymonomus is composed of 32 Indo-West Pacific species (including C. suluensis Takeda, Ohtsuchi and Komatsu, 2021), 11 West Atlantic species, and two Northeast Atlantic and Mediterranean species (Takeda et al., 2021). Ahyong (2019) distinguished six species groups: 1) C. bathamiae group, 2) C. curvirostris group, 3) C. delli group, 4) C. granulatus group, 5) C. karenae group, and 6) C. soela group, and then Takeda et al. (2021) added the C. suluensis group. The female at hand is referable to the C. delli group, which is represented by the following six species: C. andamanicus Alcock, 1905; C. cubensis Chace, 1940; C. delli Griffin and Brown, 1976; C. diogenes Ahyong and Ng, 2009; C. cognatus Ahyong and Ng, 2017; C. java Ahyong, Mitra and Ng, 2020. Among these congeners, the female at hand corresponds most closely to C. java and C. andamanicus. Like C. andamanicus, C. java is known only by a male, so comparisons with the present female of the proportional sizes of the chelipeds and ambulatory legs, and of the pleon require caution. The pereopod 3 merus of male C. andamanicus and C. java is about 1.0 CL (Ahyong et al., 2020) compared to 0.9 CL in the female — this difference is consistent with sexual dimorphism in Cymonomus, with the proportional length of the pereopod 3 merus of females typically about 10 % less than that of males (Ahyong et al., 2020). The male telson and pleonal somite 6 of C. andamanicus is immovably fused, with an indistinct demarcation (Ahyong et al., 2020, fig. 2 C), but fully demarcated, and slightly movable in C. java (Ahyong et al., 2020, fig. 4 H). In the female at hand, somite 6 and the telson are immovably fused, but a distinct, complete suture is present as in male C. java. Additionally, the finely granular carapace and pereopodal granulation resembles those of C. java, rather than the coarser ornamentation of C. andamanicus (see Ahyong et al., 2020). Thus, we herein refer the present female to C. java. Distribution. Originally reported from the south of Java (603 – 686 m), and now from further east in the Timor Sea (610 – 690 m).	en	Islam, Atikul, Banerjee, Abhishek, Wati, Sisca Meida, Banerjee, Sumita, Shrivastava, Deepti, Srivastava, Kumar Chandan (2022): Crabs (Crustacea, Decapoda) from the Sea off East and Southeast Asia Collected by the RV Hakuhō Maru (KH- 72 - 1 Cruise) 2. Timor Sea. Bulletin of the National Museum of Nature and Science. Series A, Zoology 48 (1): 5-24, DOI: 10.50826/bnmnszool.48.1_5, URL: http://dx.doi.org/10.4103/jpbs.jpbs_1287_23
039387ECAF5AFF8EFD4C29338E56FC4A.taxon	type_taxon	[Type species: Dicranodromia ovata A. Milne-Edwards, 1880]	en	Islam, Atikul, Banerjee, Abhishek, Wati, Sisca Meida, Banerjee, Sumita, Shrivastava, Deepti, Srivastava, Kumar Chandan (2022): Crabs (Crustacea, Decapoda) from the Sea off East and Southeast Asia Collected by the RV Hakuhō Maru (KH- 72 - 1 Cruise) 2. Timor Sea. Bulletin of the National Museum of Nature and Science. Series A, Zoology 48 (1): 5-24, DOI: 10.50826/bnmnszool.48.1_5, URL: http://dx.doi.org/10.4103/jpbs.jpbs_1287_23
039387ECAF5AFF89FD7B29DA8BAFF9EC.taxon	description	(Fig. 2) Material examined. RV Hakuhō Maru KH- 72 - 1 cruise, sta. 27 (Timor Sea; 09 ° 30.9 ′ S, 127 ° 56.6 ′ E, 465 – 490 m depth), 3 m beam trawl; June 20, 1972; 1 ♀ (NSMT-Cr 29249: CB 13.2 mm, CL 18.5 mm including rostrum). Remarks. A female at hand (Fig. 2) agrees well with the original description by Guinot (1993) and also with the detailed redescription by Guinot (1995), having short stiff setae completely covering the carapace, chelipeds and ambulatory legs, but not always completely concealing the dorsal areolation and armature of the carapace. This coat of stiff setae (Fig. 2) is the most important criterion distinguishing close relatives such as D. doederleini Ortmann, 1892 known from Japan, 65 – 275 m depth, and D. baffini (Alcock and Anderson, 1899), definitely known from India and the Bay of Bengal, 435 – 830 m depth. Distribution. The known localities are off the Kai and Tanimbar Islands in the Banda Sea, Indonesia, 356 – 468 m depth. Davie (2002) listed this species as one of two Australian species of Dicranodromia based on the record of Tavares (1998) from off the Lacepede Archipelago, Western Australia, at 434 m depth.	en	Islam, Atikul, Banerjee, Abhishek, Wati, Sisca Meida, Banerjee, Sumita, Shrivastava, Deepti, Srivastava, Kumar Chandan (2022): Crabs (Crustacea, Decapoda) from the Sea off East and Southeast Asia Collected by the RV Hakuhō Maru (KH- 72 - 1 Cruise) 2. Timor Sea. Bulletin of the National Museum of Nature and Science. Series A, Zoology 48 (1): 5-24, DOI: 10.50826/bnmnszool.48.1_5, URL: http://dx.doi.org/10.4103/jpbs.jpbs_1287_23
039387ECAF5DFF89FD4D2FA08E56F9DD.taxon	type_taxon	[Type species: Homolodromia paradoxa A. Milne-Edwards, 1880]	en	Islam, Atikul, Banerjee, Abhishek, Wati, Sisca Meida, Banerjee, Sumita, Shrivastava, Deepti, Srivastava, Kumar Chandan (2022): Crabs (Crustacea, Decapoda) from the Sea off East and Southeast Asia Collected by the RV Hakuhō Maru (KH- 72 - 1 Cruise) 2. Timor Sea. Bulletin of the National Museum of Nature and Science. Series A, Zoology 48 (1): 5-24, DOI: 10.50826/bnmnszool.48.1_5, URL: http://dx.doi.org/10.4103/jpbs.jpbs_1287_23
039387ECAF5DFF88FC9C2C4B8967FEAE.taxon	description	(Fig. 3 B) Material examined. RV Hakuhō Maru KH- 72 - 1 cruise, sta. 26 (Timor Sea; 09 ° 27.0 ′ S, 127 ° 58.6 ′ E – 09 ° 28.5 ′ S, 127 ° 56.1 ′ E, 610 – 690 m depth), 3 m beam trawl; June 19, 1972; 1 ♂ (NSMT-Cr 29250: CB 12.0 mm, CL 15.7 mm including rostrum), 1 ♂ (NSMT-Cr 29251: CB 14.0 mm, CL 19.8 mm), 2 ovig. ♀♀ (NSMT-Cr 29252: CB 18.1 mm, CL 26.5 mm, diameter of egg, 1.7 – 1.8 mm; CB 20.7 mm, CL 26.0 mm, diameter of egg, 1.7 – 2.2 mm). RV Hakuhō Maru KH- 72 - 1 cruise, sta. 33 (Off Sahul Shelf, 12 ° 42.2 ′ S, 123 ° 07.6 ′ E – 12 ° 42.0 ′ S, 123 ° 08.5 ′ E, 535 – 547 m depth), 3 m beam trawl; June 26, 1972; 2 young ♀♀ (NSMT-Cr 29253: CB 9.0 mm, CL 13.4 mm; CB 12.2 mm, CL 16.8 mm). Remarks. The genus Homolodromia was extensively studied by Guinot (1995) based on the four species then known, and later two new species, H. rajeevani Padate, Cubelio and Jayachandran, 2020 and H. hakuhoae Takeda, Ohtsuchi and Komatsu, 2021, were described from India and the Philippines, respectively. The early known four species are quite distinctive in their biogeographical distributions, with H. bouvieri Doflein, 1904 from the western Indian Ocean, H. kai Guinot, 1993 from the southwestern Pacific Ocean, H. robertsi Garth, 1973 from the southeastern Pacific Ocean, and H. paradoxa A. Milne-Edwards, 1880 from the western Atlantic Ocean. They are all deep-sea inhabitants as mentioned by Takeda et al. (2021). The specimen at hand is characteristic in having a smooth carapace and a coat of long soft setae entirely covering the carapace, chelipeds and ambulatory legs. This setation is somewhat similar to that of H. rajeevani, and clearly different from that of the other species. In H. rajeevani, each pseudorostral tooth is sharp and directed forward, and the branchial region is prominently inflated. Distribution. The type locality is the Kai Islands, 688 – 694 m depth, with additional records by Guinot (1995) from New Caledonia (680 – 830 m depth), Vanuatu (775 – 850 m depth) and the Wallis and Futuna Islands (705 – 711 m depth). This species is otherwise known from the South China Sea, 650 m (Ho and Ng, 1999), New Zealand and eastern Australia, 350 – 935 m (Ahyong, 2008), and the north of Tokuno-shima Island in the East China Sea, 728 – 748 m (Takeda et al., 2005). The present records are from the Timor Sea and off the Sahul Shelf (535 – 690 m depth).	en	Islam, Atikul, Banerjee, Abhishek, Wati, Sisca Meida, Banerjee, Sumita, Shrivastava, Deepti, Srivastava, Kumar Chandan (2022): Crabs (Crustacea, Decapoda) from the Sea off East and Southeast Asia Collected by the RV Hakuhō Maru (KH- 72 - 1 Cruise) 2. Timor Sea. Bulletin of the National Museum of Nature and Science. Series A, Zoology 48 (1): 5-24, DOI: 10.50826/bnmnszool.48.1_5, URL: http://dx.doi.org/10.4103/jpbs.jpbs_1287_23
039387ECAF5CFF88FC802BD38E64FDEA.taxon	type_taxon	[Type species: Homolochunia valdiviae Doflein, 1904]	en	Islam, Atikul, Banerjee, Abhishek, Wati, Sisca Meida, Banerjee, Sumita, Shrivastava, Deepti, Srivastava, Kumar Chandan (2022): Crabs (Crustacea, Decapoda) from the Sea off East and Southeast Asia Collected by the RV Hakuhō Maru (KH- 72 - 1 Cruise) 2. Timor Sea. Bulletin of the National Museum of Nature and Science. Series A, Zoology 48 (1): 5-24, DOI: 10.50826/bnmnszool.48.1_5, URL: http://dx.doi.org/10.4103/jpbs.jpbs_1287_23
039387ECAF5CFF8BFD71287A8BB3F984.taxon	description	(Fig. 3 A) Material examined. RV Hakuhō Maru KH- 72 - 1 cruise, sta. 27 (Timor Sea; 09 ° 30.9 ′ S, 127 ° 56.6 ′ E, 465 – 490 m depth), 3 m beam trawl; June 20, 1972; 1 ♀ (NSMT-Cr 29254: CB 12.3 mm, CL 18.5 mm including rostrum). Remarks. The genus Homolochunia, revised by Guinot and Richer de Forges (1981, 1995), was at the time represented by three species; H. valdiviae Doflein, 1904 (type species; western Indian Ocean and Indonesia), H. kullar Griffin and Brown, 1976 (New Caledonia, Loyalty I., and eastern Australia), and H. gadaletae Guinot and Richer de Forges, 1995 (Japan and Taiwan). Subsequently, H. menezi was described from the Solomon Islands by Richer de Forges and Ng (2008). Recently, Padate et al. (2020) recorded a male from the Andaman Sea, 635 m depth, with detailed photographs of the characters. All of the four species of Homolochunia are quite characteristic in having a pair of long pseudorostral spines with one or more accessory spines, in addition to the peculiar chela of the last leg. Of these, H. gadaletae and H. menezi are similar to each other in the longitudinally quadrate shape of the carapace, the long pseudorostral spines directed forward and armed with an accessory spine at the subdistal part, and the peculiar shape of the chela of the last leg. In the present species, the carapace dorsal surface is uneven but not tuberculate at all, and the ambulatory legs are longer and slenderer than those of H. gadaletae. Distribution. Western Indian Ocean (East Africa, Madagascar, Comoro Islands, Mozambique and Seychelles, 475 – 977 m depth), Eastern Indian Ocean (Andaman Sea, 635 m), and Indonesian waters (Makassar Strait, Mollucas, and Kai Islands, 390 – 694 m depth).	en	Islam, Atikul, Banerjee, Abhishek, Wati, Sisca Meida, Banerjee, Sumita, Shrivastava, Deepti, Srivastava, Kumar Chandan (2022): Crabs (Crustacea, Decapoda) from the Sea off East and Southeast Asia Collected by the RV Hakuhō Maru (KH- 72 - 1 Cruise) 2. Timor Sea. Bulletin of the National Museum of Nature and Science. Series A, Zoology 48 (1): 5-24, DOI: 10.50826/bnmnszool.48.1_5, URL: http://dx.doi.org/10.4103/jpbs.jpbs_1287_23
039387ECAF5FFF8BFCA92C368EA6F972.taxon	type_taxon	[Type species: Ethusina abyssicola Smith, 1884]	en	Islam, Atikul, Banerjee, Abhishek, Wati, Sisca Meida, Banerjee, Sumita, Shrivastava, Deepti, Srivastava, Kumar Chandan (2022): Crabs (Crustacea, Decapoda) from the Sea off East and Southeast Asia Collected by the RV Hakuhō Maru (KH- 72 - 1 Cruise) 2. Timor Sea. Bulletin of the National Museum of Nature and Science. Series A, Zoology 48 (1): 5-24, DOI: 10.50826/bnmnszool.48.1_5, URL: http://dx.doi.org/10.4103/jpbs.jpbs_1287_23
039387ECAF5FFF85FC892CF38876FA0B.taxon	description	(Fig. 4) Material examined. RV Hakuhō Maru KH- 72 - 1 cruise, sta. 26 (Timor Sea; 09 ° 27.0 ′ S, 127 ° 58.6 ′ E – 09 ° 285.0 ′ S, 127 ° 56.1 ′ E, 610 – 690 m deep), 3 m beam trawl; 19 June, 1972; 1 juv. (NSMT-Cr 29256: CB 4.0 mm, CL 4.2 mm), 1 juv. (NSMT-Cr 29257, dried up: CB 5.0 mm, CL 5.5 mm), 1 ♀ (NSMT-Cr 29255: CB 9.3 mm, CL 10.9 mm). Remarks. Ethusina robusta (Miers, 1886), E. investigatoris (Alcock, 1896), E. desciscens (Alcock, 1896), E. vanuatuensis Chen, 2000, and E. alcocki Ng and Ho, 2003 are closely related, differing from each other mainly in details of the front-orbital tuberculation. Their complex synonymies were thoroughly clarified by Castro (2005): 1) Ethusina investigatoris and E. alcocki were synonymized with E. robusta; 2) Ethusina robusta identified by Chen (1986) was corrected to E. chenae Ng and Ho, 2003; 3) the identifications of E. desciscens identified by Chen (1986, 1998), and Chen and Sun (2002) were corrected to E. taiwanensis Ng and Ho, 2003; 4) Ethusina robusta identified by Chen (1993) was referred to E. vanuatuensis Chen, 1993, E. macrospina Ng and Ho, 2003, and E. stenommata Castro, 2005; 5) Ethusina robusta identified by Chen (2000) was reidentified as E. ciliacirrata Castro, 2005, and E. coronata Castro, 2005; and 6) the identification of E. robusta by Chen and Sun (2002) was similarly corrected to E. chenae Ng and Ho, 2003. After detailed comparison with the literature, the female at hand (Fig. 4 A – B), which is fully mature, was identified with E. chenae. Among the species mentioned above, E. chenae is characteristic in that 1) the carapace shape is not constricted behind the external orbital spine that is directed nearly forward or only slightly outward, with the tip reaching nearly to the tip of the median frontal tooth, 2) each median frontal tooth is triangular in dorsal view, with a sharp tip, and the lateral frontal tooth is directed forward, similar in shape to the outer orbital spine, extending beyond the tip of the median frontal tooth, 3) the median frontal sinus is comparatively wide and shallow, and the orbital sinus is distinctly shallow, with the orbital margin gently retreating toward the external orbital spine. The characters observed as above in the present female seem to be minor but reliable, agreeing well with the original description and figures by Ng and Ho (2003), and with comments by Castro (2005). In the holotype female, both of the median frontal teeth seem to be blunt, probably due to damage during lifetime. The figures represented by Chen and Sun (2002) as E. robusta are somewhat schematic, but indicative of the specific characters of E. chenae. Two small juveniles at hand belong without doubt to Ethusina by having the swollen basal antennular article pushing the antenna and the long ambulatory legs, but it is remarkable in having the prominent eyestalks visible from above, different from most of the congeners and somewhat similar to the Ethusa species. They keyed out close to E. desciscens in the key provided by Castro (2005). The semitransparent soft carapace, with sharp but not spiniform frontal and external orbital teeth, and the distinct eyestalks may be referable to the immaturity of the specimens. Distribution. East China Sea (Chen, 1986, as E. robusta), Taiwan (Ng and Ho, 2002; Castro, 2005), the Philippines (Chen, 1985, as E. desciscens; Castro 2005), 509 – 1649 m depth. The record of E. desciscens from Japan by Marumura and Kosaka (2003) is not yet verified.	en	Islam, Atikul, Banerjee, Abhishek, Wati, Sisca Meida, Banerjee, Sumita, Shrivastava, Deepti, Srivastava, Kumar Chandan (2022): Crabs (Crustacea, Decapoda) from the Sea off East and Southeast Asia Collected by the RV Hakuhō Maru (KH- 72 - 1 Cruise) 2. Timor Sea. Bulletin of the National Museum of Nature and Science. Series A, Zoology 48 (1): 5-24, DOI: 10.50826/bnmnszool.48.1_5, URL: http://dx.doi.org/10.4103/jpbs.jpbs_1287_23
039387ECAF51FF85FCAE2C6C8ECDF9BF.taxon	type_taxon	[Type species: Cyrtomaia murrayi Miers, 1886]	en	Islam, Atikul, Banerjee, Abhishek, Wati, Sisca Meida, Banerjee, Sumita, Shrivastava, Deepti, Srivastava, Kumar Chandan (2022): Crabs (Crustacea, Decapoda) from the Sea off East and Southeast Asia Collected by the RV Hakuhō Maru (KH- 72 - 1 Cruise) 2. Timor Sea. Bulletin of the National Museum of Nature and Science. Series A, Zoology 48 (1): 5-24, DOI: 10.50826/bnmnszool.48.1_5, URL: http://dx.doi.org/10.4103/jpbs.jpbs_1287_23
039387ECAF51FF85FF222CF28E39FA54.taxon	description	(Fig. 5 A) Material examined. RV Hakuhō Maru KH- 72 - 1 cruise, sta. 28 (Timor Sea; 09 ° 34.4 ′ S, 128 ° 06.0 ′ E – 09 ° 33.5 ′ S, 128 ° 03.4 ′ E, 295 – 296 m depth); 3 m beam trawl; June 24, 1972; 1 ♂ (NSMT-Cr 29258: CL 10.2 mm excluding pseudorostral spines, CB 6.7 mm). Remarks. The general appearance of species of Pleistacantha changes somewhat owing to sizerelated inflation of the branchial regions and to sexual dimorphism (e. g. Prema et al., 2020). In addition, as briefly discussed by Ahyong and Lee (2006), the distinctness of sexual dimorphism probably varies among species. The taxonomy is, therefore, usually discussed mainly on the basis of adult specimens. The present specimen, a juvenile male with poorly developed gonopods, nevertheless possesses diagnostic features of P. griffini, described from the North West Shelf, Western Australia (Ahyong and Lee, 2006).	en	Islam, Atikul, Banerjee, Abhishek, Wati, Sisca Meida, Banerjee, Sumita, Shrivastava, Deepti, Srivastava, Kumar Chandan (2022): Crabs (Crustacea, Decapoda) from the Sea off East and Southeast Asia Collected by the RV Hakuhō Maru (KH- 72 - 1 Cruise) 2. Timor Sea. Bulletin of the National Museum of Nature and Science. Series A, Zoology 48 (1): 5-24, DOI: 10.50826/bnmnszool.48.1_5, URL: http://dx.doi.org/10.4103/jpbs.jpbs_1287_23
039387ECAF51FF85FF222CF28E39FA54.taxon	distribution	Distribution. North West Shelf of Australia; Timor Sea; Sumatra and off the Tanimbar Islands, Indonesia; 295 – 400 m depth.	en	Islam, Atikul, Banerjee, Abhishek, Wati, Sisca Meida, Banerjee, Sumita, Shrivastava, Deepti, Srivastava, Kumar Chandan (2022): Crabs (Crustacea, Decapoda) from the Sea off East and Southeast Asia Collected by the RV Hakuhō Maru (KH- 72 - 1 Cruise) 2. Timor Sea. Bulletin of the National Museum of Nature and Science. Series A, Zoology 48 (1): 5-24, DOI: 10.50826/bnmnszool.48.1_5, URL: http://dx.doi.org/10.4103/jpbs.jpbs_1287_23
039387ECAF51FF85FF662C2988F1F972.taxon	type_taxon	[Type species: Pleistacantha sanctijohannis Miers, 1879]	en	Islam, Atikul, Banerjee, Abhishek, Wati, Sisca Meida, Banerjee, Sumita, Shrivastava, Deepti, Srivastava, Kumar Chandan (2022): Crabs (Crustacea, Decapoda) from the Sea off East and Southeast Asia Collected by the RV Hakuhō Maru (KH- 72 - 1 Cruise) 2. Timor Sea. Bulletin of the National Museum of Nature and Science. Series A, Zoology 48 (1): 5-24, DOI: 10.50826/bnmnszool.48.1_5, URL: http://dx.doi.org/10.4103/jpbs.jpbs_1287_23
039387ECAF51FF87FCA32C298BE7FB06.taxon	description	(Fig. 5 B) Material examined. RV Hakuhō Maru KH- 72 - 1 cruise, sta. 26 (Timor Sea; 09 ° 27.0 ′ S, 127 ° 58.6 ′ E – 09 ° 285.0 ′ S, 127 ° 56.1 ′ E, 610 – 690 m depth), 3 m beam trawl; June 19, 1972; 1 ♂ with epicaridean parasites in both branchial chambers (NSMT-Cr 29259: CB 31.6 mm excluding branchial spines, CL 26.2 mm excluding pseudorostral spines), 1 ♂ with epicaridean parasite in right branchial chamber (NSMT-Cr 29260: CB 32.7 mm, CL 28.0 mm). Remarks. Both of the specimens examined are infected by epicaridean parasites; in the smaller male (NSMT-Cr 29259: Fig. 5 B), the branchial chambers of both sides are heavily deformed, and in another, slightly larger male (NSMT-Cr 29160), the right branchial chamber is also strongly bulged. Takeda et al. (2021) recorded two species of Cyrtomaia, C. horrida Rathbun, 1916 from the Sulu Sea and C. largoi Richer de Forges and Ng, 2007 from the Sibutu Passage, with some taxonomic comments. This species is distinctly different from them in having long protogastric spines. Richer de Forges and Guinot (1988) discussed the differences between the new species, C. coriolisi, and C. suhmii Miers, 1886, and indicated that there is only a vestigial intercalated granule instead of spinule on the supraorbital border in C. coriolisi. The morphological features other than the deformity of the branchial chambers essentially agree with the descriptions and illustrations by Griffin and Tranter (1986 a), Guinot and Richer de Forges (1985), Richer de Forges and Guinot (1990), Promdam (2011), and Padate et al. (2021). Distribution. Indo-West Pacific, from Japan to Australia and India through the Philippines and Indonesia, 488 – 1125 m depth. Davie (2002) recorded this species in the Zoological Catalogue of Australia based on the records by Griffin and Brown (1976), Griffin and Tranter (1986 a), and Davie and Short (1989).	en	Islam, Atikul, Banerjee, Abhishek, Wati, Sisca Meida, Banerjee, Sumita, Shrivastava, Deepti, Srivastava, Kumar Chandan (2022): Crabs (Crustacea, Decapoda) from the Sea off East and Southeast Asia Collected by the RV Hakuhō Maru (KH- 72 - 1 Cruise) 2. Timor Sea. Bulletin of the National Museum of Nature and Science. Series A, Zoology 48 (1): 5-24, DOI: 10.50826/bnmnszool.48.1_5, URL: http://dx.doi.org/10.4103/jpbs.jpbs_1287_23
039387ECAF53FF87FF572FC78E5DF9A3.taxon	description	(Fig. 5 C – D) Material examined. RV Hakuhō Maru KH- 72 - 1 cruise, sta. 26 (Timor Sea; 09 ° 27.0 ′ S, 127 ° 58.6 ′ E – 09 ° 285.0 ′ S, 127 ° 56.1 ′ E, 610 – 690 m depth), 3 m beam trawl; June 19, 1972; 1 ♀ (NSMT-Cr 29261: CL 15.2 mm excluding pseudorostral spines, CB 15.0 mm). Remarks. Manning and Holthuis (1981) suggested that Stenorhynchus ramusculus Baker, 1906 (southern Australia and New Zealand; Ahyong, 2008, Farrelly and Ahyong, 2019) and Achaeopsis rostrata Sakai, 1932 (West Pacific) are congeneric with Dorhynchus thomsoni Wyville Thomson, 1873 from the Atlantic and Indo-Pacific. Griffin and Tranter (1986 a) agreed with Manning and Holthuis (1981) in considering the congeneric identity of the three species, but referred them to the genus Achaeopsis Stimpson, 1857, without mention about the relationship to the type species, A. spinulosa Stimpson, 1857. In recent studies (Davie, 2002; Poore, 2004; Ng et al., 2008; Carmona-Suárez and Poupin, 2016), the three species in question were assigned to the genus Dorhynchus, and thus Achaepsis is monotypic. As a result, Dorhynchus is comprised of two western Pacific and three Atlantic species: D. rostratus (Sakai, 1932) from Japan and the Kai Islands, D. ramusculus (Baker, 1906) from southern Australia and New Zealand, D. basi Macpherson, 1983 from Namibia, D. furcillatus A. Milne-Edwards, 1881 from the Sea of the Antilles, and D. thomsoni Wyville Thomson, 1873 from the western and eastern Atlantic and the Indo-Pacific. A fully-grown female at hand agrees with the original description of Achaeopsis rostrata by Sakai (1932), though the protogastric and epibranchial spines are not remarkable as shown in the figures (Fig. 2 B vs. Sakai 1932, fig. 3; 1938, fig. 17). Dorhynchus rostratus can be distinguished from the other two congeners from the western Pacific by the relatively short, slightly incurved pseudorostral spines not exceeding the distal end of the antennal peduncles and the lack of distal spine on the ambulatory legs meri (Griffin and Tranter, 1986 a). Distribution. Hitherto known from Japan and the Kai Islands, Indonesia; 170 – 366 m depth. The present bathymetric record, 650 m in the Timor Sea, is the deepest for this species.	en	Islam, Atikul, Banerjee, Abhishek, Wati, Sisca Meida, Banerjee, Sumita, Shrivastava, Deepti, Srivastava, Kumar Chandan (2022): Crabs (Crustacea, Decapoda) from the Sea off East and Southeast Asia Collected by the RV Hakuhō Maru (KH- 72 - 1 Cruise) 2. Timor Sea. Bulletin of the National Museum of Nature and Science. Series A, Zoology 48 (1): 5-24, DOI: 10.50826/bnmnszool.48.1_5, URL: http://dx.doi.org/10.4103/jpbs.jpbs_1287_23
039387ECAF53FF87FF212F5C886CFA61.taxon	type_taxon	[Type species: Dorhynchus thomsoni Wyville Thomson, 1873]	en	Islam, Atikul, Banerjee, Abhishek, Wati, Sisca Meida, Banerjee, Sumita, Shrivastava, Deepti, Srivastava, Kumar Chandan (2022): Crabs (Crustacea, Decapoda) from the Sea off East and Southeast Asia Collected by the RV Hakuhō Maru (KH- 72 - 1 Cruise) 2. Timor Sea. Bulletin of the National Museum of Nature and Science. Series A, Zoology 48 (1): 5-24, DOI: 10.50826/bnmnszool.48.1_5, URL: http://dx.doi.org/10.4103/jpbs.jpbs_1287_23
039387ECAF52FF86FC85288B8EB9FCB2.taxon	type_taxon	[Type species: Rochinia carinata Griffin and Tranter, 1986]	en	Islam, Atikul, Banerjee, Abhishek, Wati, Sisca Meida, Banerjee, Sumita, Shrivastava, Deepti, Srivastava, Kumar Chandan (2022): Crabs (Crustacea, Decapoda) from the Sea off East and Southeast Asia Collected by the RV Hakuhō Maru (KH- 72 - 1 Cruise) 2. Timor Sea. Bulletin of the National Museum of Nature and Science. Series A, Zoology 48 (1): 5-24, DOI: 10.50826/bnmnszool.48.1_5, URL: http://dx.doi.org/10.4103/jpbs.jpbs_1287_23
039387ECAF52FF86FF532B4E88FFFADB.taxon	description	(Fig. 5 E) Material examined. RV Hakuhō Maru KH- 72 - 1 cruise, sta. 26 (Timor Sea; 09 ° 27.0 ′ S, 127 ° 58.6 ′ E – 09 ° 285.0 ′ S, 127 ° 56.1 ′ E, 610 – 690 m depth), 3 m beam trawl; June 19, 1972; 1 ♂ (NSMT-Cr 29262: CL 9.3 mm excluding pseudorostral spine, CB 8.7 mm). RV Hakuhō Maru KH- 72 - 1 cruise, sta. 33 (Off Sahul Shelf, 12 ° 42.2 ′ S, 123 ° 07.6 ′ E – 12 ° 42.0 ′ S, 123 ° 08.5 ′ E, 535 – 547 m depth), 3 m beam trawl; June 26, 1972; 1 ♂ (NSMT-Cr 29263: CL 14.0 mm excluding pseudorostral spines, CB 12.6 mm). Remarks. Of ten Platymaia species enumerated by Ng et al. (2008), P. fimbriata is very unique in having numerous spines on the carapace dorsal surface. Both specimens examined are small, but agree well with the original description (Rathbun, 1916) and the illustrations and photographs by Sakai (1965: pl. 5 fig. 5; 1976: pl. 58), Griffin (1976: fig. 9), and Guinot and Richer de Forges (1985: figs. 7, 8 A – B, pl. 1 fig. F – G). Distribution. Eastern Australia, Indonesia, the Philippines and Japan; 250 – 1095 m depth. Davie (2002) listed this species in the Zoological Catalogue of Australia based on the records by Griffin and Tranter (1986 a) and Davie and Short (1989).	en	Islam, Atikul, Banerjee, Abhishek, Wati, Sisca Meida, Banerjee, Sumita, Shrivastava, Deepti, Srivastava, Kumar Chandan (2022): Crabs (Crustacea, Decapoda) from the Sea off East and Southeast Asia Collected by the RV Hakuhō Maru (KH- 72 - 1 Cruise) 2. Timor Sea. Bulletin of the National Museum of Nature and Science. Series A, Zoology 48 (1): 5-24, DOI: 10.50826/bnmnszool.48.1_5, URL: http://dx.doi.org/10.4103/jpbs.jpbs_1287_23
039387ECAF52FF86FF722A8588F9FEE6.taxon	type_taxon	[Type species: Platymaia wyvillethomsoni Miers, 1886]	en	Islam, Atikul, Banerjee, Abhishek, Wati, Sisca Meida, Banerjee, Sumita, Shrivastava, Deepti, Srivastava, Kumar Chandan (2022): Crabs (Crustacea, Decapoda) from the Sea off East and Southeast Asia Collected by the RV Hakuhō Maru (KH- 72 - 1 Cruise) 2. Timor Sea. Bulletin of the National Museum of Nature and Science. Series A, Zoology 48 (1): 5-24, DOI: 10.50826/bnmnszool.48.1_5, URL: http://dx.doi.org/10.4103/jpbs.jpbs_1287_23
039387ECAF52FF86FF3B2F3A89EBFD76.taxon	description	(Fig. 5 F) Material examined. RV Hakuhō Maru KH- 72 - 1 cruise, sta. 28 (Timor Sea; 09 ° 34.4 ′ S, 128 ° 06.0 ′ E – 09 ° 33.5 ′ S, 128 ° 03.4 ′ E, 295 – 296 m depth); 3 m beam trawl; June 24, 1972; 1 ovig. ♀ (NSMT-Cr 29264: CB 39.5 mm excluding branchial spines, CL 36.7 mm excluding pseudorostral spines). Remarks. A large ovigerous female (Fig. 5 F) at hand is almost the same size as the holotype of Platymaia wyvillethomsoni, and agrees well with the descriptions and illustrations by Guinot and Richer de Forges (1985) and Griffin and Tranter (1986 a). There is little doubt about the identification as P. wyvillethomsoni, which Guinot and Richer de Forges (1985) removed from the synonymy of P. remifera Rathbun, 1916 versus Griffin (1976). Distribution. Japan to Australia through the Philippines, Indonesia, the Timor Sea and the Kermadec Islands; 189 – 549 m depth. Farrelly and Ahyong (2019) recorded this species, with photographs, from the Great Australian Bight, 189 – 426 m depth.	en	Islam, Atikul, Banerjee, Abhishek, Wati, Sisca Meida, Banerjee, Sumita, Shrivastava, Deepti, Srivastava, Kumar Chandan (2022): Crabs (Crustacea, Decapoda) from the Sea off East and Southeast Asia Collected by the RV Hakuhō Maru (KH- 72 - 1 Cruise) 2. Timor Sea. Bulletin of the National Museum of Nature and Science. Series A, Zoology 48 (1): 5-24, DOI: 10.50826/bnmnszool.48.1_5, URL: http://dx.doi.org/10.4103/jpbs.jpbs_1287_23
039387ECAF52FF81FD4E29328BCFF91C.taxon	description	(Fig. 6 A – B) Material examined. RV Hakuhō Maru KH- 72 - 1 cruise, sta. 28 (Timor Sea; 09 ° 34.4 ′ S, 128 ° 06.0 ′ E – 09 ° 33.5 ′ S, 128 ° 03.4 ′ E, 295 – 296 m depth); 3 m beam trawl; June 24, 1972; 2 ♀♀ (NSMT-Cr 29265: CB 11.1 mm excluding branchial plate, CL 17.2 mm excluding pseudorostral spine; CB 9.7 mm, CL 15.2 mm). Remarks. This species, originally described in the genus Rochinia A. Milne-Edwards, 1875, was transferred to the genus Laubierinia established by Richer de Forges and Ng (2009), as the type species. The other congeners are L. globulifera (Wood-Mason, in Wood-Mason and Alcock, 1891) and L. nodosa (Rathbun, 1916). Laubierinia carinata is characteristic in having seven large circular islets on the hepatic, mesogastric, cardiac, epibranchial and intestinal regions; the epibranchial islets are replaced by large nodular projections in L. nodosa, and strong spines in L. globulifera. Two females agree well with the description by Griffin and Tranter (1986 a, as Rochinia) and the figures and photographs by Richer de Forges and Poore (2008, as Rochinia) and Richer de Forges and Ng (2009). However, it should be noted that there is possibly sexual difference in the development of the intestinal islet; the intestinal region is slightly protuberant, with a distinct tubercle apically in a full-grown male from the Solomon Islands (Richer de Forges and Ng, 2009, fig. 9 A – B) and probably in the holotype (Griffin and Tranter, 1986 a, pl. 12), whereas it is replaced by a large circular islet in the females examined (Fig. 6 A – B). Distribution. Western Australia, Timor Sea, Kai Islands, Papua New Guinea, Solomon Islands, New Caledonia, and Norfolk Ridge seamounts, 173 – 411 m depth.	en	Islam, Atikul, Banerjee, Abhishek, Wati, Sisca Meida, Banerjee, Sumita, Shrivastava, Deepti, Srivastava, Kumar Chandan (2022): Crabs (Crustacea, Decapoda) from the Sea off East and Southeast Asia Collected by the RV Hakuhō Maru (KH- 72 - 1 Cruise) 2. Timor Sea. Bulletin of the National Museum of Nature and Science. Series A, Zoology 48 (1): 5-24, DOI: 10.50826/bnmnszool.48.1_5, URL: http://dx.doi.org/10.4103/jpbs.jpbs_1287_23
039387ECAF55FF81FD412F5B8E25FA65.taxon	type_taxon	[Type species: Samadinia longispina Ng and Richer de Forges, 2013]	en	Islam, Atikul, Banerjee, Abhishek, Wati, Sisca Meida, Banerjee, Sumita, Shrivastava, Deepti, Srivastava, Kumar Chandan (2022): Crabs (Crustacea, Decapoda) from the Sea off East and Southeast Asia Collected by the RV Hakuhō Maru (KH- 72 - 1 Cruise) 2. Timor Sea. Bulletin of the National Museum of Nature and Science. Series A, Zoology 48 (1): 5-24, DOI: 10.50826/bnmnszool.48.1_5, URL: http://dx.doi.org/10.4103/jpbs.jpbs_1287_23
039387ECAF55FF80FCDB2FC38B90F9CE.taxon	description	(Fig. 6 C) Material examined. RV Hakuhō Maru KH- 72 - 1 cruise, sta. 27 (Timor Sea; 09 ° 30.9 ′ S, 127 ° 56.6 ′ E, 465 – 490 m depth), 3 m beam trawl; June 24, 1972; 1 ♀ (NSMT-Cr 29266: CB 12.4 mm, CL 18.3 mm excluding pseudorostral spines). Remarks. The genus Rochinia A. Milne-Edwards, 1875 was formerly a catchall genus in the family Epialtidae. Ng et al. (2008) restricted Rochinia to 34 species, and subsequent taxonomic revisions removed all species, except R. gracilipes A. Milne-Edwards, 1875 (type species), to other genera (see Tavares and Santana, 2018; Lee et al., 2020). Ng and Richer de Forges (2013) established the genus Samadinia for S. longispina Ng and Richer de Forges, 2013 from French Polynesia and New Caledonia. They recognized five groups in the remaining Rochinia (Ng et al., 2008). Very recently, Samadinia was redefined by Lee et al. (2021) to include the species of the fourth and fifth groups of Rochinia s. l., which share distinct carapace regions, spined or granulated carapace surface, transversely narrow, anteriorly constricted male thoracic sternum, and acutely triangular or T-shaped male pleon. Thus, Samadinia is distinguished from Rochinia by the combination of the poorly defined carapace regions, numerous small, rounded granules on the carapace dorsal surface, the often long, sharp, laterally-directed hepatic and lateral branchial spines, broad triangular pleon with pleomeres 3 and 4 broadly trapezoidal and pleomeres 5 and 6 subrectangular. At present, Samadinia is comprised of 26 species from the Indo-West Pacific, including R. miyakensis Takeda and Marumura, 2014, from Japan. A female examined (Fig. 6 C) agrees well with the original description of R. boucheti that can be distinguished from congeners by having numerous small spines on the carapace dorsal surface and relatively short pseudorostral spines. Distribution. The type locality is the Solomon Islands, 371 – 766 m depth, and then, Lee et al. (2019) recorded many specimens from Papua New Guinea, 382 – 743 m depth. The present bathymetric record from the Timor Sea, 465 – 490 m, is the third for this species.	en	Islam, Atikul, Banerjee, Abhishek, Wati, Sisca Meida, Banerjee, Sumita, Shrivastava, Deepti, Srivastava, Kumar Chandan (2022): Crabs (Crustacea, Decapoda) from the Sea off East and Southeast Asia Collected by the RV Hakuhō Maru (KH- 72 - 1 Cruise) 2. Timor Sea. Bulletin of the National Museum of Nature and Science. Series A, Zoology 48 (1): 5-24, DOI: 10.50826/bnmnszool.48.1_5, URL: http://dx.doi.org/10.4103/jpbs.jpbs_1287_23
039387ECAF54FF80FF2E2C178EEEFA54.taxon	materials_examined	Material examined. RV Hakuhō Maru KH- 72 - 1 cruise, sta. 26 (Timor Sea; 09 ° 27.0 ′ S, 127 ° 58.6 ′ E – 09 ° 285.0 ′ S, 127 ° 56.1 ′ E, 610 – 690 m depth), 3 m beam trawl; June 19, 1972; 1 ♂ (NSMT-Cr 29267: CB 5.8 mm excluding branchial spines, CL 9.8 mm excluding pseudorostral spines), 2 ♀♀ (NSMT-Cr 29268: CB 8.2 mm, CL 12.8 mm; CB 10.5 mm, CL 17.7 mm). Remarks. Samadinia soela was originally described as a species of Rochinia from the North West Shelf, Australia, but was transferred to Samadinia by Lee et al. (2021). The specimens at hand agree well with the original description by Griffin and Tranter (1986 b) and also with that of Takeda and Moosa (1990). Samadinia soela resembles S. sibogae from the Ceram Sea in having the long, divergent pseudorostral spines, the long, sharp branchial spines, and the laterally-flattened hepatic lobe continuous with the postorbital lobe. Samadinia soela is, however, distinguished from S. sibogae by the robust pseudorostral spines, the cardiac region armed with an obtuse tubercle instead of a spine, the sharp and robust preorbital lobe (blunt and small in S. sibogae), the postorbital lobe distinctly broadened anteriorly and continuous dorsally with the narrowed hepatic lobe (Fig. 6 E) (weakly broadened anteriorly and continuous dorsally with rounded hepatic lobe in S. sibogae) (see also Griffin and Tranter, 1986 b, figs. 12 – 13; Takeda and Moosa, 1990, fig. 4 D – E, pl. 2 fig. C – D). The G 1 of S. soela is illustrated for the first time, though it does not appear to present any distinctive features compared to its congeners (Fig. 7). Distribution. Flores Sea, Timor Sea, and North West Shelf of Australia; 558 – 650 m depth.	en	Islam, Atikul, Banerjee, Abhishek, Wati, Sisca Meida, Banerjee, Sumita, Shrivastava, Deepti, Srivastava, Kumar Chandan (2022): Crabs (Crustacea, Decapoda) from the Sea off East and Southeast Asia Collected by the RV Hakuhō Maru (KH- 72 - 1 Cruise) 2. Timor Sea. Bulletin of the National Museum of Nature and Science. Series A, Zoology 48 (1): 5-24, DOI: 10.50826/bnmnszool.48.1_5, URL: http://dx.doi.org/10.4103/jpbs.jpbs_1287_23
039387ECAF54FF80FD4F2C4B8E56F972.taxon	type_taxon	[Type species: Trichopeltarion nobile A. Milne-Edwards, 1880]	en	Islam, Atikul, Banerjee, Abhishek, Wati, Sisca Meida, Banerjee, Sumita, Shrivastava, Deepti, Srivastava, Kumar Chandan (2022): Crabs (Crustacea, Decapoda) from the Sea off East and Southeast Asia Collected by the RV Hakuhō Maru (KH- 72 - 1 Cruise) 2. Timor Sea. Bulletin of the National Museum of Nature and Science. Series A, Zoology 48 (1): 5-24, DOI: 10.50826/bnmnszool.48.1_5, URL: http://dx.doi.org/10.4103/jpbs.jpbs_1287_23
039387ECAF54FF83FD4B2CF28925FD4B.taxon	description	(Fig. 8 D) Material examined. RV Hakuhō Maru KH- 72 - 1 cruise, sta. 33 (Off Sahul Shelf, 12 ° 42.2 ′ S, 123 ° 07.6 ′ E – 12 ° 42.0 ′ S, 123 ° 08.5 ′ E, 535 – 547 m depth), 3 m beam trawl; June 26, 1972; 1 ♀ (NSMT-Cr 29269: CB 18.8 mm excluding lateral spines, CL 22.0 mm excluding rostrum). Remarks. Among 23 Trichopeltarion species listed by Tavares and Cleva (2010), T. alcocki Doflein, in Chun, 1903 is one of the rarest species, with only few specimens known from the depths of the West Pacific. The identification, however, is not difficult owing to the extensive illustrations provided by the original author (1903, unnumbered figure; 1904, pl. 28 figs. 4 – 5, as Trichopeltarium), Guinot (1989, figs. 1, 8, pl. 1 figs. A – F, as Trachycarcinus), and Tavares and Cleva (2010, figs. 12 – 13, 14 A). This species is close to T. ovale Anderson, 1896, ranging from Japan to Sri Lanka through Taiwan, the Philippines and Indonesia, 100 – 928 m depth, but the ambulatory legs are distinctly longer and more slender. Otherwise, Tavares and Cleva (2010) reproduced the photograph of the holotype female and mentioned that the merus – carpus articulation of the last ambulatory leg almost reaches the second epibranchial tooth (lying well before the second tooth in T. ovale). Distribution. The type locality is the Siberut Strait, west of Sumatra, Indonesia, at 750 m depth. The other known localities are the Philippines, 1030 – 1650 m depth, and Taiwan; 718 – 852 m depth.	en	Islam, Atikul, Banerjee, Abhishek, Wati, Sisca Meida, Banerjee, Sumita, Shrivastava, Deepti, Srivastava, Kumar Chandan (2022): Crabs (Crustacea, Decapoda) from the Sea off East and Southeast Asia Collected by the RV Hakuhō Maru (KH- 72 - 1 Cruise) 2. Timor Sea. Bulletin of the National Museum of Nature and Science. Series A, Zoology 48 (1): 5-24, DOI: 10.50826/bnmnszool.48.1_5, URL: http://dx.doi.org/10.4103/jpbs.jpbs_1287_23
039387ECAF57FF83FD7729698EBBFCB2.taxon	type_taxon	[Type species: Tenagopelta pacifica Ng and Castro, 2016]	en	Islam, Atikul, Banerjee, Abhishek, Wati, Sisca Meida, Banerjee, Sumita, Shrivastava, Deepti, Srivastava, Kumar Chandan (2022): Crabs (Crustacea, Decapoda) from the Sea off East and Southeast Asia Collected by the RV Hakuhō Maru (KH- 72 - 1 Cruise) 2. Timor Sea. Bulletin of the National Museum of Nature and Science. Series A, Zoology 48 (1): 5-24, DOI: 10.50826/bnmnszool.48.1_5, URL: http://dx.doi.org/10.4103/jpbs.jpbs_1287_23
039387ECAF57FF9DFCE42932885CFEAE.taxon	description	(Fig. 8 A – C)	en	Islam, Atikul, Banerjee, Abhishek, Wati, Sisca Meida, Banerjee, Sumita, Shrivastava, Deepti, Srivastava, Kumar Chandan (2022): Crabs (Crustacea, Decapoda) from the Sea off East and Southeast Asia Collected by the RV Hakuhō Maru (KH- 72 - 1 Cruise) 2. Timor Sea. Bulletin of the National Museum of Nature and Science. Series A, Zoology 48 (1): 5-24, DOI: 10.50826/bnmnszool.48.1_5, URL: http://dx.doi.org/10.4103/jpbs.jpbs_1287_23
039387ECAF57FF9DFCE42932885CFEAE.taxon	materials_examined	Material examined. RV Hakuhō Maru KH- 72 - 1 cruise, sta. 26 (Timor Sea; 09 ° 27.0 ′ S, 127 ° 58.6 ′ E – 09 ° 285.0 ′ S, 127 ° 56.1 ′ E, 610 – 690 m depth), 3 m beam trawl; June 19, 1972; 1 ♀ (NSMT-Cr 29417: CB 8.2 mm, CL 7.2 mm).	en	Islam, Atikul, Banerjee, Abhishek, Wati, Sisca Meida, Banerjee, Sumita, Shrivastava, Deepti, Srivastava, Kumar Chandan (2022): Crabs (Crustacea, Decapoda) from the Sea off East and Southeast Asia Collected by the RV Hakuhō Maru (KH- 72 - 1 Cruise) 2. Timor Sea. Bulletin of the National Museum of Nature and Science. Series A, Zoology 48 (1): 5-24, DOI: 10.50826/bnmnszool.48.1_5, URL: http://dx.doi.org/10.4103/jpbs.jpbs_1287_23
039387ECAF57FF9DFCE42932885CFEAE.taxon	discussion	Remarks. In the monograph on the family Chasmocarcinidae Serène, 1964, Ng and Castro (2016) revised all the known species of the worldwide, with keys to the subfamilies, genera and species. The descriptions are elaborate, with many photographs of numerous specimens from many localities. Following this monumental work, a female specimen at hand was identified, though tentatively, as Tenagopelta potens (Davie and Richer de Forges, 2013) in the subfamily Chasmocarcininae Serène, 1964, in which the antennular peduncle is so swollen that the flagellum cannot be folded into the fossa. Among 11 genera distinguished, the genus Tenagopelta was characterized by the combination of the following characters: 1) The eyestalks are mobile within the orbits; 2) the carapace is subquadrate; 3) the lsupplementary platez is wide, stretching across exposed part of the male thoracic sternum not covered by pleon, reaching the sterno-pleonal cavity, and the G 1 is normal, not strongly twisted; 4) the region immediately below the orbital margin is smooth, without a separate ridge; 5) the pollex of the minor chela has many small, approximately equal teeth; 6) the carapace is conspicuously globose, with a convex dorsal surface; 7) the G 2 is distinctly longer than the G 1. The type species of Tenagopelta is T. pacifica Ng and Castro, 2016 from the Philippines and Indonesia, and the congeneric species are T. potens (Davie and Richer de Forges, 2013) from Papua New Guinea, Vanuatu, New Caledonia and Queensland and T. brachyphallus Ng and Castro, 2016 from Western Australia. According to the original description and the key, the males of T. pacifica and T. potens may be readily distinguished from each other by the different shape of the G 1 (elongated and slender distal two-thirds in T. pacifica, and short and stout distal half in T. podens). However, most of the external characters described for the two species are precisely applicable to the female at hand. The carapace is subtrapezoidal and globose in both T. pacifica and T. podens, with arcuate, unarmed anterolateral margins without distinct lobes or teeth, the proportions of the carapace (CB: CL) being 1.15 – 1.25 (Davie and Richer de Forges) and 1.1 – 1.2 (Ng and Castro) in T. podens, and 1.0 – 1.2 in T. pacifica. As such, the shape of the carapace and the carapace proportional difference seem to be not specific. However, Ng and Castro (2016) recorded that the carapace dorsal and ventral surfaces and the pereiopods are covered by a short tomentum in T. potens, and that the carapace margin is provided with short setae in T. pacifica. The setation may be variable individually, developmentally and sexually, but is currently considered as one of the taxonomic criteria. The carapace dorsal surface of the present female is shallowly divided into regions by the longitudinal furrows along both sides of the gastric and cardiac regions (Fig. 8 B), agreeing with the images of the dorsal and antero-dorsal views of the holotype given by the original authors (Davie and Richer de Forges, 2013, figs. 1 A, 3). A topotypic male should, however, be examined for definite identification.	en	Islam, Atikul, Banerjee, Abhishek, Wati, Sisca Meida, Banerjee, Sumita, Shrivastava, Deepti, Srivastava, Kumar Chandan (2022): Crabs (Crustacea, Decapoda) from the Sea off East and Southeast Asia Collected by the RV Hakuhō Maru (KH- 72 - 1 Cruise) 2. Timor Sea. Bulletin of the National Museum of Nature and Science. Series A, Zoology 48 (1): 5-24, DOI: 10.50826/bnmnszool.48.1_5, URL: http://dx.doi.org/10.4103/jpbs.jpbs_1287_23
039387ECAF57FF9DFCE42932885CFEAE.taxon	distribution	Distribution. Known from the West Pacific (Northeast Queensland; Papua New Guinea; Vanuatu; New Caledonia), 95 – 970 m depth.	en	Islam, Atikul, Banerjee, Abhishek, Wati, Sisca Meida, Banerjee, Sumita, Shrivastava, Deepti, Srivastava, Kumar Chandan (2022): Crabs (Crustacea, Decapoda) from the Sea off East and Southeast Asia Collected by the RV Hakuhō Maru (KH- 72 - 1 Cruise) 2. Timor Sea. Bulletin of the National Museum of Nature and Science. Series A, Zoology 48 (1): 5-24, DOI: 10.50826/bnmnszool.48.1_5, URL: http://dx.doi.org/10.4103/jpbs.jpbs_1287_23
