Pheidole severini HNS Forel
Pheidole severini HNS Forel 1904e: 171.
Types Mus. Hist. Nat. Geneve (syntype minor only; major not located, may be in the Musee de Bruxelles, the source of Forel's material).
Etymology Eponymous.
Diagnosis A member of the tristis HNS group, similar (in the minor caste, the only one available in this study) to excubitor HNS, grandinodus HNS, and obrima HNS in the greatly enlarged postpetiole and overall habitus, differing in the shallow, nearly flat venter of the postpetiole in side view; constricted ventral margin of the postpetiolar node from above; much longer antennal scapes; and more prominent nuchal collar.
Measurements (mm) Syntype minor: HW 0.74, HL 1.02, SL 1.32, EL 0.20, PW 0.52. Color Minor: concolorous dark yellow.
Range Known only from the type locality.
Biology Unknown.
Figure Syntype, minor. FRENCH GUIANA: Cayenne. Scale bar = 1 mm.