Gerontoformica rugosa

Identification
Boudinot et al. (2022) - †Gerontoformica rugosa and †Gerontoformica tendir are newly considered as nomina dubia due to their poor preservation, being strongly desiccated and thus distorted. Both species appear to have some degree of abdominal segment III petiolation, as observed in the three confirmed members of the pilosa group, but it cannot be determined whether this is natural or exaggerated due to preservation. It is possible, but not yet determinable, that †G. rugosa is conspecific with †G. gracilis. That †G. rugosa or †G. tendir do have sculptured integument remains possible but requires substantiation via additional material of these species. We note that little surface texture variation has been explicitly documented among stem ants thus far.

Distribution
This taxon was described from.

Nomenclature

 * †. †Sphecomyrmodes rugosus Barden & Grimaldi, 2014: 15, fig. 6A-C (w.) BURMESE AMBER (Myanmar, Cretaceous).
 * Combination in †Gerontoformica: Barden & Grimaldi, 2016: in supplemental information (not paginated).
 * Status as species: Barden, 2017: 3.
 * Nomen dubium: Boudinot, Richter, Katzke, et al. 2022: 9.