Acanthostichus davisi

Known only from males. Specimens have been sampled from creosote bush scrub and other desert vegetation at blacklights. They are very abundant at some localities, especially in the state of Chihuahua, Mexico. (Mackay and Mackay 2002)

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

Nomenclature

 * . Cerapachys (Parasyscia) davisi Smith, M.R. 1942b: 64 (m.) U.S.A. (Texas).
 * Combination in Acanthostichus: Brady, et al. 2014: 6.
 * Status as species: Creighton, 1950a: 58; Smith, M.R. 1951a: 782; Brown, 1975: 22; Smith, D.R. 1979: 1333; Bolton, 1995b: 142; Mackay & Mackay, 2002: 43; Ward, 2005: 26.

Male
The male holotype of davisi differs from the known males of Syscia augustae as follows: Size larger (3.8 mm.); posterior border of head rounded and merging into each side without forming as definite a subangular posterior corner; all funicular segments except first distinctly longer than broad (less incrassated than in augustae); pronotum almost one-half length of mesonotum; front wing with or without a closed cubital cell; veins more prominent and more nearly enclosing radial and cubital cell (when cubital cell is not completely enclosed); sculpture different, davisi having fine rugulae between inner border of eye and antenna, and similar rugulae on epinotum, especially the sides of epinotum; sixth tergite more coarsely sculptured, subopaquc; color dark brown, almost black.

The paratypes range in length from 3.8 to 4.2 mm.

Type Material
Described from holotype and 3 paratype specimens, each bearing the label "Fort Davis, Tex., Jeff Davis County, 5000 feet, Davis Mountains, Mrs. O. C. Poling, Nov. 15, 1927." These have been assigned United States National Museum Number 56091.

References based on Global Ant Biodiversity Informatics

 * Cokendolpher J. C., and O. F. Francke. 1990. The ants (Hymenoptera, Formicidae) of western Texas. Part II. Subfamilies Ecitoninae, Ponerinae, Pseudomyrmecinae, Dolichoderinae, and Formicinae. Special Publications, the Museum. Texas Tech University 30:1-76.
 * Dattilo W. et al. 2019. MEXICO ANTS: incidence and abundance along the Nearctic-Neotropical interface. Ecology https://doi.org/10.1002/ecy.2944
 * Mackay W. P., and E. E. Mackay. 2002. The ants of New Mexico (Hymenoptera: Formicidae). Lewiston, New York: Edwin Mellen Press, 400 pp.
 * O'Keefe S. T., J. L. Cook, T. Dudek, D. F. Wunneburger, M. D. Guzman, R. N. Coulson, and S. B. Vinson. 2000. The Distribution of Texas Ants. The Southwestern Entomologist 22: 1-92.
 * Smith M. R. 1942. The males of two North American cerapachyine ants. Proceedings of the Entomological Society of Washington 44: 62-64.
 * Vásquez-Bolaños M. 2011. Lista de especies de hormigas (Hymenoptera: Formicidae) para México. Dugesiana 18: 95-133
 * Ward P. S. 2005. A synoptic review of the ants of California (Hymenoptera: Formicidae). Zootaxa 936: 1-68.
 * Wheeler, G.C. and J. Wheeler. 1985. A checklist of Texas ants. Prairie Naturalist 17:49-64.