Crematogaster atra

Identification
Longino (2003) - A Crematogaster crinosa-complex species, C. atra requires further taxonomic study. The Norton type series, from which the lectotype is chosen, has the general shape and pilosity characters of Crematogaster crinosa, the only difference being that the face is completely covered with fine, dense striae, with no smooth or shiny areas.

Distribution based on Regional Taxon Lists
Neotropical Region: Argentina, Brazil, Mexico, Venezuela.

Nomenclature

 *  atra. Crematogaster atra Mayr, 1870b: 994 (w.) MEXICO. Combination in C. (Orthocrema): Emery, 1922e: 134. See also: Longino, 2003a: 129.

Description
Longino (2003) - Syntype worker: Mexico (Norton, Bilimek) (examined, Norton worker here designated LECTOTYPE). The syntypes of atra have no more precise locality data than “Mexico,” but are by two different collectors, Bilimek and Norton.