Fossil ants of the genus Gesomyrmex Mayr (Hymenoptera, Formicidae) from the Eocene of Europe and remarks on the evolution of arboreal ant communities Author Dlussky, Gennady M. Author Wappler, Torsten Author Wedmann, Sonja text Zootaxa 2009 2031 1 20 journal article 10.5281/zenodo.186261 f4bc44d8-5688-4500-839e-2449308f744c 1175-5326 186261 0919CF2B-DBC2-4504-B48A-8AD0D01695DB Gesomyrmex flavescens sp. nov. ( Fig. 3 B and Fig. 6 J) Derivation of the name. Flavescens is Latin for yellowish. Holotype . NHMM PE- 2000/14 (Ƥ). Type locality and horizon. Eckfeld, Germany . Middle Eocene, ca. 44 Ma (Mertz et al. 2000). Description. Gyne. BL about 13 mm . Head subrectangular, 1.2 times longer than wide, with nearly parallel sides, sharp posterolateral corners and straight posterior margin. Anterior margin of the clypeus straight. Head 3.5 times longer than maximum eye diameter. Ocelli moderate large, distance between them some times greater than their diameter. Mesosoma a little wider than head. Scutum about as long as wide. Petiole with thick scale, longer than wide. Wing venation not preserved. Posterior part of the head, mesosoma, petiole and base of first gastral segment yellowish brown, anterior part of head and gaster varying from black to dark brown. Wings colorless with brown veins and pterostigma. Measurements (in mm). Holotype PE-2000/14: AL 4.0, HL 2.4, HW 2.0, ED 0.65.