Gesomyrmex is a genus of ants in the subfamily Formicinae. The genus contains six extant species, known from the Indomalayan realm, and nine fossil species. Of the extant species, four are known only from workers (G. chaperi, G. howardi, G. kalshoveni and G. spatulatus) and two only from females (G. luzonensis and G. tobiasi). The extinct species "G. expectans" and "Gesomyrmex miegi", formerly placed in the genus, were excluded by Dlussky et al.., 2009.
The living species are arboreal typically building nests in the twigs of trees.
Species †Gesomyrmex bremii (Heer, 1849) †Gesomyrmex breviceps Dlussky, Wappler & Wedmann, 2009 Gesomyrmex chaperi André, 1892 †Gesomyrmex curiosus Dlussky, Wappler & Wedmann, 2009 †Gesomyrmex flavescens Dlussky, Wappler & Wedmann, 2009 †Gesomyrmex germanicus Dlussky, Wappler & Wedmann, 2009 †Gesomyrmex hoernesi Mayr, 1868 Gesomyrmex howardi Wheeler, 1921 †Gesomyrmex incertus Dlussky, Rasnitsyn & Perfilieva, 2015 Gesomyrmex kalshoveni Wheeler, 1929 Gesomyrmex luzonensis (Wheeler, 1916) †Gesomyrmex macrops Dlussky, Rasnitsyn & Perfilieva, 2015 †Gesomyrmex magnus Dlussky, Rasnitsyn & Perfilieva, 2015 †Gesomyrmex pulcher Dlussky, Wappler & Wedmann, 2009 Gesomyrmex spatulatus Cole, 1949 Gesomyrmex tobiasi Dubovikov, 2004
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