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 gracilis (Fabricius 1804) . Formica gracilis Fabricius 1804: 405 . Leptalea gracilis (Fabricius) . Erichson 1839: 309. Pseudomyrma gracilis (Fabricius) . Roger 1862b: 289. Pseudomyrma ( Clavanoda ) gracilis (Fabricius) . Enzmann 1944: 61. Pseudomyrma gracilis var. atrinoda Santschi 1934: 26 . NEW SYNONYMY. [ holotype w examined, NHMB; Rio Negro, Paraná, Brazil (Reichensperger)]. Pseudomyrmex gracilis (Fabricius) . Kusnezov 1953: 214. Pseudomyrmex gracilis var. atrinoda (Santschi) . Kempf 1958: 434. Pseudomyrmex gracilis var. atrinodus (Santschi) . Kempf 1972: 219. Ants in the Pseudomyrmex gracilis species complex are ubiquitous in the neotropics, and the species P. gracilis itself presents a confusing array of variation (Ward 1989). Santschi distinguished his variety P. atrinodus on the basis of small size and light coloration on parts of the mesosoma, but I have examined the type material and in both these characters P. atrinodus is well within the normal range of variation of the species. Phil Ward, who is revising Pseudomyrmex , concurs with this synonymy (Ward, pers comm .)