Insecta matsumurana. New series : journal of the Faculty of Agriculture Hokkaido University, series entomology.;New Series 67

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A first species of Tetramorium (Hymenoptera, Formicidae, Myrmicinae) with a polymorphic worker caste

Yamane, Seiki;Jaitrong, Weeyawat;Yamane, Seiki;Jaitrong, Weeyawat

Permalink : http://hdl.handle.net/2115/47454

Abstract

A first Tetramorium ant with a polymorphic worker caste is described from Laos as T. polymorphum sp. nov. It may be most closely related to T. kheperra (Bolton), but is distinguished from the latter by the medially concave anterior margin of the clypeus and the lack of regular puncto-reticulation on the frontal area just behind the clypeus. The workers of T. polymorphum are roughly sorted into three size classes, In the minor and media workers most standing hairs on the dorsum of body are branched, while in the major worker and queen almost all the standing hairs are simple. Another new species related to T. kheperra, T. hasinae sp. nov., is described from Thailand. Additional collection records are given to T.kheperra.

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