Crematogaster coarctata

Nevada, Wheeler and Wheeler (1986) - sixteen nests were under stones, 1 was exposed with a 50-mm crater, 1 was in duff at the base of a juniper, 2 were at the base of Sarcobatus vermiculatus, 3 were at the base of Atriplex confertifolia. Workers of C. coarctata were tending Phenacoccus solenopsis (Homoptera: Pseudococcidae; det. D.R. Miller) on the bases of stems of Atriplex confertifolia just below ground surface.

Identification
Key to Crematogaster of the western United States

Distribution based on Regional Taxon Lists
Nearctic Region: United States. Neotropical Region: Mexico.

Nomenclature

 *  coarctata. Crematogaster coarctata Mayr, 1870b: 992 (w.) U.S.A. Combination in C. (Acrocoelia): Emery, 1922e: 141; in C. (Crematogaster): Buren, 1968b: 94. Junior synonym of lineolata: Mayr, 1886d: 462. Revived from synonymy as subspecies of lineolata: Emery, 1895c: 283; Wheeler, W.M. 1904d: 270. Revived status as species: Wheeler, W.M. 1919g: 111. Subspecies of lineolata: Emery, 1922e: 141; of opaca: Enzmann, J. 1946c: 94. Revived status as species: Creighton, 1950a: 207; Buren, 1968b: 94 (in key).