Brachymyrmex australis pullus

Ortiz-Sepulveda et al. (2019) did not include information on this species in their revision as the type series, consisting of a single worker, was destroyed and is not present in the.

Identification
Ortiz-Sepulveda et al. (2019): As the type specimen is not available, we could only re-examine the morphological descriptions of Santschi (1933), from which we conclude that B. longicornis var. pullus seems to be morphologically similar to Brachymyrmex patagonicus and Brachymyrmex bruchi. Brachymyrmex longicornis var. pullus has a shiny body that is black or dark brownish, the scapes surpass the posterior margin of the head, it has large eyes that occupy a third of the sides of the head, and the thorax would have been similar to that of B. longicornis which indicates that the mesonotum did not bulge dorsally above the pronotum in lateral view. Santschi (1933) did not describe the pubescence on the gaster, and so in the above we consider the pubescence to be similar to that of typical B. longicornis (here synonymized to Brachymyrmex australis), B. longicornis var. hemiops (here synonymized to Brachymyrmex aphidicola), and B. longicornis var. immunis (here synonymized to Brachymyrmex admotus). If this assumption were not true, B. longicornis var. pullus would resemble Brachymyrmex cordemoyi and Brachymyrmex obscurior more than B. bruchi and B. patagonicus.

Distribution based on Regional Taxon Lists
Neotropical Region: Argentina.

Nomenclature

 * . Brachymyrmex longicornis var. pullus Santschi, 1933e: 122 (w.) ARGENTINA (Misiones).
 * Subspecies of longicornis: Kempf, 1972a: 40; Bolton, 1995b: 82.
 * Unidentifiable taxon; incertae sedis in Brachymyrmex: Ortiz-Sepúlveda, et al. 2019: 533.
 * [Note: Ortiz-Sepúlveda, et al. 2019: 533, record that the holotype of pullus (the only known specimen) has been destroyed in the past, and its original description is inadequate.]
 * As subspecies of australis: Ortiz-Sepulveda et al., 2019: 533 (by implication, as longicornis synonymised with australis).