The Aradidae (Insecta, Hemiptera, Heteroptera) of Argentina Author Contreras, Eugenia Fernanda Author Coscarón, María Del Carmen text Zootaxa 2012 3500 1 35 journal article 10.5281/zenodo.215294 9e62896d-fcee-4263-a0bb-0c2a84fd1bad 1175-5326 215294 CBDF71F7-70A8-415F-83CA-3010E8B2E8B6 Species of Isodermus Erichson Antennae slender, second segment not strongly thickened anteriorly, third segment antennal as long as fourth. Abdomen dilated and much wider than thorax. Tibia strongly thickened apically. Seven ventral segment on either side of bilobed plates elongate, subtriangular in female................ .. Isodermus gayi (Spinola) ( Fig. 4 C–D).