Crematogaster quadriformis Roger Crematogaster quadriformis var gracilior Forel Crematogaster quadriformis subsp. vezenyii Forel Crematogaster quadriformis r gracilior Forel Crematogaster (Orthocrema) quadriformis Roger Crematogaster (Orthocrema) quadriformis subsp. gracilior Forel Crematogaster (Orthocrema) quadriformis subsp. vezenyii Forel Crematogaster (Orthocrema) quadriformis gracilior Forel Crematogaster (Orthocrema) quadriformis vezeneyii Forel A catalogue of the ants of Paraguay (Hymenoptera: Formicidae). Wild, A. L. Zootaxa 2007 1622 1 55 6BDD8 urn:lsid:biosci.ohio-state.edu:osuc_concepts:28384 Insecta Formicidae Crematogaster CoL Animalia Crematogaster quadriformis Roger Hymenoptera 52 Arthropoda species quadriformis   Crematogaster quadriformis Roger1863a: 207.  Crematogaster quadriformis var gracilior Forel1901c. NEW SYNONYMY. [w syntypesexamined, MHNG;  SaoPaulo, Brazil]  Crematogaster quadriformis subsp. vezenyii Forel1907b: 25. NEW SYNONYMY.  Crematogaster quadriformis r gracilior Forel. Forel 1912c: 218.  Crematogaster (Orthocrema) quadriformis Roger. Santschi 1918: 182.  Crematogaster (Orthocrema) quadriformis subsp. gracilior Forel. Emery 1924a: 135.  Crematogaster (Orthocrema) quadriformis subsp. vezenyii Forel. Emery 1924a: 135.  Crematogaster (Orthocrema) quadriformis gracilior Forel. Kempf 1972: 88.  Crematogaster (Orthocrema) quadriformis vezeneyii Forel. Kempf 1972: 89.   Crematogaster quadriformisis the most frequently recorded ground-nesting Crematogasterin Paraguay. This species can be diagnosed by the following combination of character states: propodeum in profile only slightly or not at all depressed below level of mesonotum; propodeal spines elongate but shorter than length of petiole; antennal scapes equal or greater in length than head length, in repose well exceeding the posterior margins of the head in full-face view; head sculpture densely punctate/striate except for a smooth frontal strip;>20 subdecumbent to suberect setae on the first gastric tergite. Crematogaster quadriformisshows considerable variation even within nest series in overall size, pilosity, eye size, and extent of punctation/striation on the head.  Jack Longino examined some recent Paraguayan collections and confirmed the identity of this species as C. quadriformis. I have subsequently viewed Forel’s types of C. quadriformis graciliorfrom SaoPaulo and found them to fall well within the range of variation I have observed in Paraguay, so I synonymize C. graciliorhere. I was not able to view Forel’s types of C. quadriformis vezenyii, described from material collected in Asuncion. Forel’s description notes small size, a more shiny head, and lack of a well-developed tooth in the propodeal suture. These character states are common in the C. quadriformismaterial I have examined towards the small end of the size distribution of nest series, so I find it likely that C. quadriformis vezenyiiis a collection of a young nest or small workers of C. quadriformis. 923905311 MHNG Brazil Sao Paulo Sao Paulo syntypes