Formica impàris Say, 1836:287, ♂♀. ♂, ♀, Indiana. - As Prenolepis imparis: - Reddell & Cokendolpher, 2001Reddell, J.R. & J.C. Cokendolpher 2001. Ants (Hymenoptera: Formicidae) from the caves of Belize, Mexico, and California and Texas (U.S.A). Texas Memorial Museum, Speleological Monographs 5:129-154. (distribution); Ruíz-Cancino & Coronado-Blanco, 2002Ruíz-Cancino, E. & J.M. Coronado-Blanco 2002. Artrópodos terrestres de los estados de Tamaulipas y Nuevo León, México. Serie Publicaciones Cientificas No. 4:1-376. (distribution); Fernández & Sendoya, 2004Fernández, F. & S. Sendoya 2004. List of Neotropical ants (Hymenoptera: Formicidae). Biota Colombiana 5 (1):3-93. (distribution); AntWeb, 2023AntWeb 2023. Ants. . (distribution). - As Prenolepis imparis imparis:
Formica wichita Buckley, 1866:169
Prenolepis nitens americana Forel, 1891:94
Prenolepis imparis minuta Emery, 1893:636 - Smith, 1958Smith, M.R. 1958. Family Formicidae. In: Krombein, K.V. (Ed.). Hymenoptera of America North of Mexico - Synoptic Catalog. Washington: U.S. Department of Agriculture. Agriculture Monograph No. 2. First Supplement, 305 pp. 108-162.:147 ( listed as synonym of Prenolepis imparis imparis (Say, 1836)).
Prenolepis imparis testacea Emery, 1893:636 - Smith, 1958Smith, M.R. 1958. Family Formicidae. In: Krombein, K.V. (Ed.). Hymenoptera of America North of Mexico - Synoptic Catalog. Washington: U.S. Department of Agriculture. Agriculture Monograph No. 2. First Supplement, 305 pp. 108-162.:147 ( listed as synonym of Prenolepis imparis imparis (Say, 1836)).
Prenolepis imparis arizonica Wheeler, 1930:22 - AntWeb, 2023AntWeb 2023. Ants. . (distribution).
Prenolepis imparis colimana Wheeler, 1930:24 - Fernández & Sendoya, 2004Fernández, F. & S. Sendoya 2004. List of Neotropical ants (Hymenoptera: Formicidae). Biota Colombiana 5 (1):3-93. (distribution); AntWeb, 2023AntWeb 2023. Ants. . (distribution).
Prenolepis imparis veracruzensis Wheeler, 1930:24 - Fernández & Sendoya, 2004Fernández, F. & S. Sendoya 2004. List of Neotropical ants (Hymenoptera: Formicidae). Biota Colombiana 5 (1):3-93. (distribution); AntWeb, 2023AntWeb 2023. Ants. . (distribution).
Prenolepis imparis coloradensis Wheeler, 1930:22
Prenolepis imparis californica Wheeler, 1930:23
Prenolepis imparis pumila Wheeler, 1930:21 - Smith, 1958Smith, M.R. 1958. Family Formicidae. In: Krombein, K.V. (Ed.). Hymenoptera of America North of Mexico - Synoptic Catalog. Washington: U.S. Department of Agriculture. Agriculture Monograph No. 2. First Supplement, 305 pp. 108-162.:147 ( listed as synonym of Prenolepis imparis imparis (Say, 1836)).