A New Species of the Ant Subgenus Orthonotomyrmex Ashmead, 1906 in the Genus Camponotus Mayr, 1861 (Hymenoptera: Formicidae) from Thailand

Abstract

Camponotus siamensis sp. nov. is described from northeastern Thailand, based on minor and major workers. The new species belongs to the subgenus Orthonotomyrmex Ashmead, 1906 and is most similar to Camponotus lasiselene Wang et Wu, 1994 and Camponotus selene (Emery, 1889), but it can be recognized by 1) the anterolateral corner of the pronotum in dorsal view is produced and right-angled in the minor worker; 2) erect hairs sparse on the dorsum of the body; 3) the propodeal junction is nearly right-angled, without spines; and 4) the petiole dorsal outline is roundly convex in profile view. The type series was collected from a dead twig hanging on a shrub in a mixed deciduous forest.