Geosesarma noduliferum ( De Man, 1892 )

Ng, Peter K. L. & Wowor, Daisy, 2019, The vampire crabs of Java, with descriptions of five new species from Mount Halimun Salak National Park, West Java, Indonesia (Crustacea: Brachyura: Sesarmidae: Geosesarma), Raffles Bulletin of Zoology 67, pp. 217-246 : 218-222

publication ID	https://doi.org/ 10.26107/RBZ-2019-0018
publication LSID	lsid:zoobank.org:pub:0656D7C5-0498-40B6-9348-284800EE671D
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treatment provided by	Carolina
scientific name	Geosesarma noduliferum ( De Man, 1892 )
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Treatment

Geosesarma noduliferum ( De Man, 1892) View in CoL

( Figs. 1–4 View Fig View Fig View Fig View Fig )

Sesarma (Geosesarma) nodulifera De Man, 1892: 342 View in CoL , pl. 20, fig. 16; Nobili, 1900: 512 (part).

Sesarma (Geosesarma) nodulifera View in CoL – Ortmann, 1894: 56; Serène, 1968b: 106.

Sesarma (Geosesarma) noduliferum – Rathbun, 1910: 309.

Sesarma (Sesarma) nodulifera View in CoL – De Man, 1902: 519; Tesch, 1917: 178.

Geosesarma noduliferum View in CoL – Serène & Soh, 1970: 402, 407; Ng, 1988: 119; Ng et al., 2008: 221; Ng e al., 2015: 3, figs. 1A, B, 2A–E, 5A, B.

(not Sesarma (Geosesarma) noduliferum – Serène 1968a: 1094, figs. 19, 20 = Geosesarma confertum View in CoL [Ortmann, 1892]).

Material examined. West Java Province, Bogor City: 1 male (12.0 × 11.0 mm) ( MZB Cru 4888), Bogor Timur District , Ds. Tajur, coll. M. Djajasasmita, 24 December 1977 ; 2 males (10.8 × 9.4 mm, 11.2 × 9.9 mm), 7 females (7.4 × 6.6 mm – 11.8 × 10.4 mm), 1 ovigerous female (12.0 × 10.9 mm, eggs 1.8 mm diameter) ( MZB Cru 4889), Bogor Barat District, Ds. Cilendek Barat , S. Cisadane , 06°34′54.8″S 106°46′30.7″E, 202 m asl, 21 December 2017 GoogleMaps . Bogor Regency: 3 males (9.3 × 8.9 mm – 10.9 × 9.9 mm), 1 male (poorly preserved, 10.7 × 9.5 mm), 1 female (7.2 × 6.5 mm) ( MZB Cru 4448), Tenjolaya District , Ds. Tapos 1, Kp. Sinar Wangi, S. Ciampea at the border of Gunung Bunder Resort , 06°40′46.6″S 106°41′39.6″E, 775 m asl, coll. D. Wowor et al., 2 October 2015 GoogleMaps ; 2 males (8.5 × 7.6 mm, 9.3 × 8.9 mm), 3 females (9.9 × 8.5 mm – 10.9 × 10.4 mm) ( MZB Cru 3403), Taman Sari District, Ds. Sukajadi , Kp. Gadog Sisi , S. Cihideung , 06°39′03.7″S 106°43′15.3″E, 562 m asl, coll. D. Wowor et al., 26 September 2011 GoogleMaps ; 1 male (9.9 × 9.1 mm) ( MZB Cru 3407), 1 male (10.9 × 10.4 mm) ( ZRC 2018.0282 View Materials ex-MZB Cru 3407), Tenjolaya District , Ds. Gunung Malang, Kp. Cibitung , S. Cibitung , 06°39′01.5″S 106°43′09.3″E, 551 m asl, coll. D. Wowor et al., 27 September 2011 GoogleMaps ; 2 males (10.1 × 9.2 mm, 11.3 × 10.5 mm), 2 females (8.2 × 7.2 mm, 8.3 × 7.3 mm) ( MZB Cru 3014), 2 males (12.1 × 11.4 mm, 12.7 × 11.7 mm), 2 females (10.0 × 8.6 mm, 10.5 × 8.9 mm) ( ZRC 2018.0283 View Materials ex-MZB Cru 3014), Megamendung District , Ds. Sukaresmi , S. Cisukabirus , 06°42′09.7″S 106°54′43.7″E, 800 m asl, coll. D. Wowor et al., 10 May 2010 GoogleMaps ; 2 males (8.4 × 7.8 mm, 12.3 × 10.9 mm), 1 female (10.1 × 9.3 mm) ( MZB Cru 4644), Bogor Selatan District, Ds. Katulampa 2, S. Ciliwung , 06°38′03.6″S 106°50′24.9″E, 370 m asl, coll. D. Wowor et al., 26 July 2009 GoogleMaps ; 2 males (11.1 × 10.2 mm, 11.8 × 10.4 mm), 1 ovigerous female (10.9 × 10.5 mm, eggs 1.5 mm diameter) ( MZB Cru 4645), Megamendung District, Ds. Sukamanah , S. Cisukabirus , 06°41′12.8″S 106°54′08.0″E, 703 m asl, coll. D. Wowor et al., 24 July 2009 GoogleMaps . Cianjur Regency: 8 males (10.5 × 9.5 mm – 14.5 × 13.5 mm), 2 females (12.3 × 11.3 mm, 12.6 × 11.4 mm) ( MZB Cru 4646), 4 males (12.9 × 11.5 mm – 13.7 × 12.8 mm) ( ZRC 2018.0284 View Materials ex-MZB Cru 4646), Sukaresmi District , Ds. Cibadak , Kp. Rawa Benceh, S. Ciwalen at rice field, coll. U. Komarudin, 24 July 2009 ; 19 males (8.0 × 7.4 mm – 13.9 × 12.2 mm), 12 females (9.4 × 8.1 mm – 12.7 × 11.7 mm), 5 ovigerous females (9.6 × 8.6 mm – 11.3 × 10.6 mm, 1 female with juveniles in pouch (11.4 × 9.9 mm) ( MZB Cru 4643), Cipanas District , Ds. Sindanglaya, at vegetable garden, coll. U. Komarudin, 24 July 2009 . Banten Province, Lebak Regency: 3 males (8.8 × 8.4 mm, 10.9 × 10.2 mm, 11.3 × 10.6 mm), 5 females (8.4 × 7.3 mm – 10.9 × 10.2 mm) ( MZB Cru 4796), 3 males (9.6 × 8.9 mm, 10.4 × 9.5 mm, 13.3 × 12.4 mm), 2 females (9.6 × 9.3 mm, 10.9 × 9.6 mm) ( ZRC 2018.0294 View Materials ex-MZB Cru 4796) , Banten Province, Lebak Regency, Cipanas District, Ds. Cipanas , 06°32′54.9″S 106°23′55.7″E, 184 m asl, coll. D. Wowor, I. Rachmatika & A. Mun’im, 30 August 2005 GoogleMaps .

Revised diagnosis of male. Carapace squarish, wider than long, lateral margins gently concave, subparallel ( Figs. 1A, B View Fig , 2A, C, E View Fig , 3A, B View Fig ); dorsal surface with distinct regions, anterior regions with numerous small rounded granules ( Figs. 1B, C View Fig , 2E View Fig , 3A, B View Fig ); front deflexed, frontal lobes very broad with almost truncate margins, separated by broad median concavity; postfrontal cristae sharp ( Figs. 1B, C View Fig , 2E View Fig , 3A, B View Fig ); external orbital tooth triangular, directed obliquely outwards, tip reaching anterior part of lateral carapace margin, first epibranchial tooth triangular, well defined, separated from margin by distinct cleft ( Figs. 1B View Fig , 2E View Fig ). Ischium of third maxilliped ovate, wide; exopod relatively slender, with long flagellum that extends beyond merus width ( Fig. 4A View Fig ). Outer surface of palm of adult male chelae granulate; inner surface granulated but without prominent transverse comblike ridge; dorsal margin of dactylus with 11–13 (usually 10 or 11) evenly spaced small tubercles (last one near tip often very small), each with chitinous tip ( Figs. 1E, F View Fig , 2F, G View Fig ). Ambulatory legs with relatively broad meri, with sharp subdistal spine on dorsal margin, surfaces gently rugose; ventral margins of propodus and dactylus of adult first ambulatory leg with scattered stiff setae ( Figs. 1A View Fig , 2A, C View Fig , 3A, B View Fig ). Male pleon triangular; telson triangular with rounded tip, slightly longer than broad; somite 6 with convex lateral margins ( Figs. 1D View Fig , 2B, D View Fig , 4B, C View Fig ). G1 relatively slender, subdistal part of outer margin before chitinous distal part rounded with inner dorsal section relatively slender; chitinous distal part bent about 40° along longitudinal axis, elongate, tapering, slender in lateral view, subspatuliform in mesial view; tip clefted when viewed dorsally ( Figs. 4 View Fig D–F, H–J, 6D–F).

Females. The adult female carapace is relatively broader and more trapezoidal in general shape ( Fig. 3C View Fig ). The vulvae are on the anterior half of sternite 6, raised, directed obliquely inwards towards the median line of the sternum, the margin is indented medially and without a sternal opercular cover ( Fig. 3E View Fig ). The eggs of ovigerous females were between 1.8 mm ( MZB Cru 4889) and 1.5 mm in diameter ( MZB Cru 4645).

Remarks. Examination of the good series of specimens of G. noduliferum obtained by the second author from the lower slopes of Mount Salak requires a revised diagnosis for this species which is common in the habitats outside Bogor, especially in view of the new allied species recognised here ( G. lebak , new species). The present study augments and updates the description and figures of the type by Ng et al. (2015). The form of the male pleon, notably the general proportions and the shape of somite 6, varies to some degree. Some of the smaller specimens tend to have a slightly wider male somite 6 with the lateral margins slightly more convex ( Fig. 1D View Fig ) compared to larger ones ( Figs. 2B, D View Fig , 4B, C View Fig ); and the chitinous distal part of the G1 varies slightly in length as well ( Fig. 4F, J View Fig ).

See General Discussion for comparisons with allied Javan species.

Notes on habitat. It is found mainly at the side of moderate-fast current streams, under the stones nearby human settlement, rice field and tea plantation ( Fig. 25A View Fig ). Sometimes it can be encountered in holes at the moist wall of a river. Besides that, the species also inhabits edge of secondary forest with soft ground, in holes among dense weed. Those places are open area with very little canopy coverage. Geosesarma noduliferum is a middle stretch stream species live between 170 to 800 m asl.

Life colouration. The carapace is reddish dark brown to dark blue with yellow eyes and bright maroon chelae.

Distribution. Widespread in Bogor and Cianjur Regencies, West Java Province, and Lebak Regency, Banten Province.