Fallomyrma robusta

Identification
Radchenko & Dlussky (2018) - Fallomyrma robusta is similar to Fallomyrma transversa in the propodeum sculpture. It differs from all known species of Fallomyrma in the robuster, stout body and the much shorter, slightly transversal head (CI = 0.96 versus ≥ 1.15).

Distribution
This taxon was described from.

Worker
Radchenko & Dlussky, 2018. Figure 1g-j. Holotype worker.

Nomenclature

 * † robusta. †Fallomyrma robusta Radchenko & Dlussky, 2018: 160, plate 6, figs. 1, 2 (w.) UKRAINE (Rovno Amber).

Worker
Body length is somewhat greater than 3 mm. The head is slightly wider than long, oval, with strongly convex lateral sides, slightly convex occipital margin, and widely rounded occipital corners. The masticatory margin of the mandibles has six teeth.

The mesosoma is short, stout; the promesonotum is slightly arched convex; the metanotal groove is relatively shallow and rather wide; the propodeum has short, but distinct rectangular teeth. The petiole has a rather short peduncle; its node is as high as the petiole length. The postpetiole is globular.

The body is smooth and shiny, only the propodeum has transversal rugosity (similar to that of F. transversa) and genae have short longitudinal rugae. The mesosoma, petiole, head, and gaster have long suberect setae, which are especially abundant on the gaster. The legs and antennal scape lack suberect setae (decumbent pubescence is also invisible).

Type Material
Holotype. , no. K–2204, worker; Rovno amber, Late Eocene.

Etymology
From the Latin robustus (strong, robust, powerful), as is characteristic of its habitus.