Species: Pogonomyrmex serpens
Taxonomic history (from RAJ):
Pogonomyrmex cunicularis (sic) var. serpens Santschi, 1922: 349 (worker). Syntypes examined: 2 workers [MACN], BOLIVIA, San José, (Liser and Delétang leg.). Kusnezov, 1951: 251 [synonomized under P. cunicularius; synonomy not confirmed here]. See also Gallardo, 1932: 123, fig. 15 (MACN worker here designated LECTOTYPE). NEW STATUS as valid species (Johnson, 2015)
Pogonomyrmex cunicularis (sic) var. carnivora Santschi, 1925: 155, fig. 2 (worker). Syntypes examined: 6 workers [MACN], 1 worker [MZUSP], ARGENTINA, Santa Fe Province: Fives Lille (Weiser leg.). Kusnezov, 1951: 251 [synonomy under P. cunicularius]; Wheeler & Wheeler 1972: 236 [revived from synonomy, raised to species]; Bolton, 1995: 340 [resynonomized under P. cunicularius; synonomy not confirmed here]. See also Gallardo, 1932: 123, fig. 14 (MACN worker here designated LECTOTYPE).
Etymology: The specific epithet, serpens (from Latin, serpens = serpent), refers to a snake. Santschi did not discuss the naming of this species, so that its derivation is unclear. The name might relate to the narrow, elongate body of this species.
Species description: (RAJ revision description)
Other literature: Gallardo, 1932; Kusnezov, 1951
Photos of all castes and synonyms: lectotype worker, worker, ergatoid queen