A catalogue of the ants of Paraguay (Hymenoptera: Formicidae) Author Wild, Alexander L. text Zootaxa 2007 1622 1 55 journal article 10.5281/zenodo.179222 9584df9a-a4a2-49bb-a256-cb99776f4dc8 1175-5326 179222 Pseudomyrmex acanthobius (Emery 1896b) . Pseudomyrma acanthobia Emery 1896b: 628 . [w syntypes examined, MCSN, MHNG; Paraguay (Bohls)]. Pseudomyrma acanthobia var. fuscata Emery 1896b: 629 . NEW SYNONYMY. [w syntypes examined, MCSN, MHNG; Paraguay (Bohls)]. Pseudomyrmex acanthobius (Emery) . Kusnezov 1953: 214. Pseudomyrmex acanthobius var. fuscatus (Emery) . Kempf 1972: 215. Pseudomyrmex acanthobius , a small pallidus- group species with large eyes and a relatively swollen fore femur, has been recorded sporadically from Paraguay nesting in Acacia thorns. Emery described both P acanthobius and P. acanthobius var. fuscatus in the same paper (Emery 1896b), distinguishing the two forms on the basis of color. The collections I have seen of this species can vary from orange-yellow to dark brown. Phil Ward, who is currently revising Pseudomyrmex , has examined Emery’s types and my recent Paraguayan collections and concluded that the color variation is intraspecific. As there are no other characters that reliably differ between the forms, I see no reason to dissent from Ward’s assessment.