Eldermyrmex oblongiceps

Dlussky (1997) postulated that this species likely did not belong in Iridomyrmex and that it “... most probably should be placed into another genus ...” However, he did not erect a new genus for it as he only had Wheeler’s (1915) drawing available and did not feel this was sufficient to establish a new genus. It is clear that this species does not belong to Iridomyrmex, and is, in fact, so distinct that assignment to a separate, and new, genus seems straightforward. This genus, Eldermyrmex, was established by Shattuck (in Heterick & Shattuck, 2011).

Key to the species of the genus Eldermyrmex
Key based on Dubovikoff et al. (2019).
 * Head long (CI 158), with subparallel sides and straight occipital margin. Basal surface of propodeum is more long than declivous (Pl. 1, figs. 1, 2). Petiole with small conical node inclined forward Eldermyrmex oblongiceps
 * Head shorter (CI 120), with convex sides and deeply concave occipital margin. Basal surface of propodeum distinctly shorter than declivous. Petiole with high vertical conical node (Pl. 1, figs. 5, 6) Eldermyrmex exsectus

Distribution
This taxon was described from.

Nomenclature

 * † oblongiceps. †Iridomyrmex oblongiceps Wheeler, W.M. 1915h: 93, fig. 45 (w.) BALTIC AMBER (Eocene). Provisionally retained in Iridomyrmex: Shattuck, 1992a: 16. Combination in †Ctenobethylus: Dlussky & Rasnitsyn, 2009: 1036; in †Eldermyrmex: Shattuck, in Heterick & Shattuck, 2011: 170.