FIGURE 8. A, B, Geosesarma spectrum n in Geosesarma spectrum, a new species of semiterrestrial vampire crab (Crustacea: Decapoda: Brachyura: Sesarmidae) from Brunei Darussalam, Borneo

FIGURE 8. A, B, Geosesarma spectrum n. sp., holotype male (13.6 × 13.5 mm) (ZRC 2018.0740), Brunei; C, G. katibas Ng, 1995, holotype male (13.5 × 13.5 mm) (ZRC 1996.01834), Sarawak; D, G. katibas Ng, 1995, paratype male (13.2 × 13.1 mm) (ZRC 1995.0274), Sarawak; E, G. katibas Ng, 1995, male (12.2 × 11.9 mm) (ZRC 2016.0296), Sarawak; F, G. gracillimum (De Man, 1892), male (12.1 × 11.8 mm) (ZRC 2007.262), Sarawak. A, male thoracic sternum and pleon; B–E, male pleonal somites 3–6 and telson.