Eulithomyrmex

There are two fossil species in the genus Eulithomyrmex, both species are known from Florissant shale (Oligocene) in the United Sates. At this time Eulithomyrmex is placed within the subfamily Agroecomyrmecinae.

Identification
Female. - Head subquadrate; mandibles small; clypeus large; antennal scrobes present; antennae short, 12-segmented, with a two-jointed club; eipinotumm not armed; petiole and postpetiole short and compressed, the forewing with two cubital cells; head, thorax, and pedicel, coarsely sculptured.

Male. - Antennae 13-segmented; scape short, but a little longer than the second segment; sculpturing weaker than that of the female; forewing with two cubital cells.

Worker. - Very similar to the female, apparently differing only in the smaller size.

Distribution
Found only in Florissant shale (Oligocene) in the United States.

Castes
Queens, males and workers known.

Nomenclature
The following information is derived from Barry Bolton's New General Catalogue, a catalogue of the world's ants. Barry continually updates his Catalogue and thus the following information reflects an up-to-date accounting of ant taxonomy. We are indebted to Barry for making this information available.

Genus *EULITHOMYRMEX Taxonomic history [Replacement name for *Lithomyrmex Carpenter, 1930: 34; junior homonym of Lithomyrmex Clark, 1928a: 30 (Formicidae).]
 * Eulithomyrmex Carpenter, 1935: 91.
 * Eulithomyrmex in Myrmicinae, Agroecomyrmecini: Brown & Kempf, 1968: 184; Bolton, 1994: 105; Baroni Urbani & De Andrade, 2007: 75.
 * Eulithomyrmex in Agroecomyrmecinae, Agroecomyrmecini: Bolton, 2003: 181.