Iridomyrmex mapesi

The condition of the only known specimen of this species is so poor that discussions of its morphology are limited to the most general and vague characterisation. Wilson (1985a) notes that the species possesses fewer mandibular teeth than New World species then placed in Iridomyrmex (now placed in Linepethima). He compares the mandibles with those of extant Australian species, finding them similar to Iridomyrmex calvus and Iridomyrmex rufoniger, as well as what is now Philidris cordata. Essentially no other details are provided. With so little information available it is impossible to support a specific generic placement of this taxon, and Heterick and Shattuck (2011) retained it in Iridomyrmex as incertae sedis, acknowledging that this placement is unsupported and likely to be incorrect based on biogeographic considerations and the great age difference between this species and the origins of modern members of Iridomyrmex.

Distribution
This taxon was described from U.S.A.

Nomenclature

 * † mapesi. †Iridomyrmex mapesi Wilson, 1985d: 211, figs. 4, 5 (w.) U.S.A. Provisionally retained in Iridomyrmex: Shattuck, 1992a: 16. Unidentifiable taxon, incertae sedis in Iridomyrmex: Heterick & Shattuck, 2011: 168.