The vampire crabs of Java, with descriptions of five new species from Mount Halimun Salak National Park, West Java, Indonesia (Crustacea: Brachyura: Sesarmidae: Geosesarma) Author Ng, Peter K. L. Author Wowor, Daisy text Raffles Bulletin of Zoology 2019 2019-04-03 67 217 246 journal article 10.26107/RBZ-2019-0018 2345-7600 4575815 0656D7C5-0498-40B6-9348-284800EE671D Geosesarma sukabumi , new species ( Figs. 8–10 ) Material examined. West Java Province , Sukabumi Regency : holotype : male (11.5 × 10.3 mm ) ( MZB Cru 4555), Cikakak District , Ds. Cirendang, Kp. Paniisan , cliff nearby S. Cirendang , 06°53′57.0″S 106°33′11.1″E , 587 m asl , coll. D. Wowor et al., 18 May 2016 . Paratypes : 13 males (6.3 × 5.5 mm – 10.5 × 9. 1 mm ), 8 females (5.2 × 4.7 mm – 10.4 × 9.9 mm ), 2 juveniles ( MZB Cru 4647), 1 male (10.3 × 9.0 mm), 1 female (9.2 × 8.0 mm) ( ZRC 2018.0287 ex-MZB Cru 4647), same data as holotype . Diagnosis of male. Carapace subquadrate, slightly wider than long, lateral margins sinuous, gently divergent ( Fig. 8A, B ); dorsal surface with clear regions, anterior regions with numerous small rounded granules ( Fig. 8B, C ); front deflexed, frontal lobes broad with convex margins, separated by broad, shallow median concavity; postfrontal cristae sharp ( Fig. 8B, C ); external orbital tooth triangular, directed obliquely outwards, tip extending slightly beyond anterior part of lateral carapace margin, first epibranchial tooth truncate, well defined, separated from margin by small cleft ( Fig. 8B ). Ischium of third maxilliped ovate; exopod relatively slender, with long flagellum that extends just beyond merus width ( Fig. 10A ). Outer surface of palm of adult male chelae with low granules and rugae; inner surface granulated but without transverse comb-like ridge; dorsal margin of dactylus with 3 or 4 distinct large tubercles on proximal third, each with chitinous tip ( Fig. 8 F–H). Ambulatory legs with relatively broad meri, with sharp subdistal spine on dorsal margin, surfaces rugose; ventral margins of propodus and dactylus of adult first ambulatory leg with dense comb-like setae. Male pleon triangular; telson triangular with rounded tip, as long as broad; somite 6 wide, with convex lateral margins ( Fig. 8D, E ). G1 relatively stout, subdistal part of outer margin before chitinous distal part gently curved with inner dorsal section strongly developed; chitinous distal part bent about 80º along longitudinal axis, tapering, relatively slender in lateral view, spatuliform in mesial view; tip rounded when viewed dorsally ( Fig. 10 B–E). Fig. 10. Geosesarma sukabumi , new species , holotype male (11.5 × 10.3 mm) (MZB Cru 4555). A, left third maxilliped; B, left G1 (dorsal view); C, left G1 (ventral view); D, left G1 (ventro-mesial view); E, left G1(dorso-mesial view); F, left G2. All structures denuded. Scales: A = 1.0 mm; B–F = 0.5 mm. Females . The adult female carapace is more trapezoidal in form ( Fig. 9A ). The vulvae are on the anterior half of sternite 6, slightly raised, directed obliquely inwards towards the median line of the sternum, the margin is indented medially and without a sternal opercular cover ( Fig. 9C ). Etymology . The species is named after the region where it was found, Sukabumi Regency. The name is used as a noun in apposition. Remarks . See General Discussion for comparisons with allied Javan species. Notes on habitat. The species was found under wet leaf litter, with water seeping from the base of a cliff, not far from a stream at the edge of a small hamlet. The ground is a mixture of gravel and coarse sand. The habitat is about 12.6 m above the stream, shadowed by trees grow on the cliff at around 580 m asl ( Fig. 25C ). Life colouration. The carapace and chelae are dark brown with black eyes. Distribution . Sukabumi Regency in West Java Province , in Gunung Koneng Resort of Mount Halimun Salak National Park.