Species: Pogonomyrmex rastratus
Taxonomic history (from RAJ):
Pogonomyrmex rastratus
Mayr, 1868: 171 (worker). Syntypes examined: 2 workers [NMW], ARGENTINA
, Mendoza Province: Pampa de Cañota, in the mountains near Mendoza (Strobel leg., January, 1866). See also Gallardo, 1932: 134, fig. 20.
Etymology: The specific epithet, rastratus (Latin, from rastrat = covered as if with longitudinal scratches), is derived from the very fine, dense longitudinal striations on the first gastric tergite. As noted by Mayr, the “anterior half of first abdominal segment with dense, shallow longitudinal striae (rastrato) that often diverge laterally toward the posterior in an irregular fashion”.
Species description:
Mayr, 1868 (RAJ revision description)
Other literature: Gallardo, 1932; Kusnezov, 1951
Photos of all castes: lectotype worker, worker, alate queen, male

Photos courtesy of Brian Fisher & Antweb