Systematics of the ant genus Proceratium Roger (Hymenoptera, Formicidae, Proceratiinae) in China - with descriptions of three new species based on micro-CT enhanced next-generation-morphology Author Staab, Michael Author Garcia, Francisco Hita Author Liu, Cong Author Xu, Zheng-Hui Author Economo, Evan P. text ZooKeys 2018 770 137 192 http://dx.doi.org/10.3897/zookeys.770.24908 journal article http://dx.doi.org/10.3897/zookeys.770.24908 1313-2970-770-137 63FDA225900E42A69FD18B02D8CD1F44 63FDA225900E42A69FD18B02D8CD1F44 Proceratium stictum clade Definition. Worker of this clade can be separated from all other Proceratium by the combination of calcar of strigil with a basal spine and clypeus distinctly and broadly notched (definition follows Baroni Urbani and de Andrade 2003 ). Comments. This is an exclusively tropical clade with species occurring in Africa, Australia, Madagascar, the Mascarene Islands, Mesoamerica, and tropical southeast Asia. Eleven extant species are known, of which P. deelemani Perrault, 1981, P. foveolatum Baroni Urbani & de Andrade, 2003, P. stictum Brown, 1958, and the newly described P. shohei are known from the oriental zoogeographic region. Proceratium shohei is the only species known from China.