Geosesarma De Man, 1892

Ng, Peter K. L., 2015, Semiterrestrial crabs of the genus Geosesarma De Man, 1892 (Crustacea, Brachyura, Sesarmidae) from western Borneo, Indonesia, with descriptions of three new species, Zootaxa 4048 (1), pp. 37-56 : 38

Genus Geosesarma De Man, 1892

Type species. Sesarma (Geosesarma) nodulifera De Man, 1892 , subsequent designation by Serène & Soh (1970).

Comparative material. In addition to the ZRC material listed in Ng (1988, 1992, 1995a, b, 2002), Ng & Grinang (2004) and Schubart & Ng (2014), the following additional material from Borneo, Riau Islands and Singapore was examined: Geosesarma peraccae (Nobili, 1903) : 6 males, 7 females ( ZRC), Greenbank Park, Bukit Timah, Singapore, coll. H.H. Tan & K.K.P. Lim, 7 May 1994; 13 males, 13 females ( ZRC 1989.3786–3811), Nee Soon Swamp Forest, on grass verge next to pipeline, Singapore, coll. P.K.L. Ng, 28 December 1989; 4 males (largest 14.2 × 12.0 mm) ( ZRC 2010.324), Nee Soon Swamp Forest, Singapore, near pipeline, coll. P.K.L. Ng, August 2010. Geosesarma sarawakense (Serène, 1968) : holotype male (11.8 × 10.3 mm) ( ZRC 1965.7.29.6), River Churat, Surakei (= Sarikei), Sibu, Sarawak, Malaysia, coll. 1948. Geosesarma gracillimum (De Man, 1902) : 6 males (largest 12.1 × 11.8 mm), 7 females (largest 11.1 × 10.4 mm), 1 ovigerous female (12.0 × 11.6 mm) ( ZRC 2007.262), besides trail in Glen Forest, arboreal, Lambir National Park, Sarawak, Malaysia, coll. T.M. Leong et al., 22, 23, 25 April 2007; 1 female (11.3 × 11.1 mm) ( ZRC 2011.031), on leaf, away from water, near termite mound, Lambir National Park, coll. H.S. Yong, 1995; 1 male (12.9 × 12.6 mm) ( ZRC 2011.030), Niah National Park, Sarawak, Malaysia, coll. rangers, 19 February 2001; 1 crushed male (roadkill) ( ZRC 2007.257), Bintulu, Samarahan Division, Sarawak, Malaysia, coll. T.M. Leong 14 April 2007; 2 males, 1 female ( ZRC 2011.1023), near Pagon House, Kuala Belalong Field Studies Centre, Brunei, coll. Samahan, 15 February 1993; 1 male, 3 females ( ZRC), forest floor, West Ridge, Kuala Belalong Field Studies Centre, Brunei, in pitfall, coll. J.K. Charles, 7 February 1993. Geosesarma bau Ng & Grinang, 2004: 1 female ( ZRC), in cup of Nepenthes ampullaria (Jack, 1835) [Nepentheceae], Mount Santubong, Sarawak, Malaysia, coll. W. Denzer, 10 April 1992; 1 female (9.6 × 9.3 mm) ( ZRC 2002.0228), 10th mile rock, into Kuap, 1°25’8.9”N 110°20’52.9”E, Sarawak, Malaysia, coll. P.K.L. Ng et al., 5 September 1995; 1 ovigerous female (11.2 × 10.9 mm) ( ZRC 1965.7.29.5), River Chuat, Sibu, near Sarikei, Sarawak, Malaysia, coll. 1948.