Sphecomyrma valid
Wilson, E. O.; Brown, W. L., Jr. 1967. [Untitled. Descriptions of new taxa: Sphecomyrminae Wilson and Brown, new subfamily; Sphecomyrma Wilson and Brown, new genus; Sphecomyrma freyi Wilson and Brown, new species.]. Pp. 6-10 in: Wilson, E. O.; Carpenter, F. M.; Brown, W. L., Jr. 1967. The first Mesozoic ants, with the description of a new subfamily. Psyche (Cambridge) 74:1-19.   130411

Sphecomyrma canadensis obsolete combination Canada (Alberta, Medicine Hat Amber, Cretaceous).
Wilson, E. O. 1985f. Ants from the Cretaceous and Eocene amber of North America. Psyche (Cambridge) 92:205-216.   130395

Sphecomyrma freyi valid U.S.A. (New Jersey, New Jersey amber, Cretaceous).
Wilson, E. O.; Brown, W. L., Jr. 1967. [Untitled. Descriptions of new taxa: Sphecomyrminae Wilson and Brown, new subfamily; Sphecomyrma Wilson and Brown, new genus; Sphecomyrma freyi Wilson and Brown, new species.]. Pp. 6-10 in: Wilson, E. O.; Carpenter, F. M.; Brown, W. L., Jr. 1967. The first Mesozoic ants, with the description of a new subfamily. Psyche (Cambridge) 74:1-19.   130411

Sphecomyrma mesaki valid U.S.A. (New Jersey, New Jersey amber, Cretaceous).
Engel, M. S.; Grimaldi, D. A. 2005. Primitive new ants in Cretaceous amber from Myanmar, New Jersey, and Canada (Hymenoptera: Formicidae). American Museum Novitates 3485:1-23.   131191

Sphecomyrma nexa valid U.S.A. (North Carolina, Campanian amber).
Sosiak, C. E.; Cockx, P.; Suarez, P. A.; McKellar, R. C.; Barden, P. 2024. Prolonged faunal turnover in earliest ants revealed by North American Cretaceous amber. Current Biology 34:1755-1761.   144312