A review of the Teinobasis of Sundaland, with the description of Teinobasis cryptica sp. nov. from Malaysia (Odonata: Coenagrionidae)

Teinobasis cryptica sp. nov. (holotype male: Borneo, Sarawak, Bahagian Samarahan, Kota Samarahan, old UNIMAS campus, disturbed peatswamp forest, 25 ii 2008, RMNH) from Malaysia is described from both sexes and compared with other Teinobasis species known to occur in Malaysia. The members of the genus known from Sundaland are reviewed. Records of T. ruficollis from Borneo are clarified. New records of other Bornean species are listed. The females or T. laidlawi, T. rajah and T. ruficollis are described for the first time. Keys are given to both sexes of all named species from the genus known from peninsular Malaysia, Singapore and the Greater Sunda Islands and the species are placed provisionally into two groups: the laidlawi-group and ruficollis -group. The former group also includes T. rubricauda from the Palawan region of the Philippines, which may be a junior synonym of T. laidlawi.