Polyrhachis revoili

Identification
Rigato (2016) - The main differences between revoili André and Polyrhachis weissi are as follows:

P. revoili can be compared to other species of the group bearing a clypeal lobe as well, e.g. Polyrhachis volkarti and Polyrhachis kohli; yet, I could not find any worker looking conspecific with the revoili type.

Distribution based on Regional Taxon Lists
Afrotropical Region: Somalia.

Nomenclature

 *  revoili. Polyrhachis revoili André, 1887: 285 (q.) SOMALIA. Forel, 1894b: 71 (w.); Forel, 1916: 452 (m.). Combination in P. (Pseudocyrtomyrma): Emery, 1921e: 23; Emery, 1925b: 207; in P. (Myrma): Forel, 1916: 452; Wheeler, W.M. 1922a 999; Bolton, 1973b: 338.

Queen
Rigato (2016) - Holotype. HL 1.52, HW 1.25, CI 82, SL 1.81, SI 145, FW 0.46, FI 37, MnL 1.85, ScW 1.48, WL 2.52, HTL 1.89.

Clypeus bearing a slightly protruding, wide lobe, whose anterior margin is slightly arcuate and limited laterally by right angled corners. Head in full face view oval, wider behind than in front, posterior margin evenly convex without posterior corners; sides in front of the eyes anteriorly converging and straight. Eyes relatively large and convex. Ocelli small. Pronotal and propodeal sides immarginate. Pronotal teeth small and robust. Propodeal dorsum in dorsal view strongly transverse (at its widest point it is more the thrice as wide as medially long), arched both longitudinally and transversely. Propodeal dorsum posterolaterally with a pair of weak, distant propodeal ridges; between the ridges the propodeal dorsum smoothly merges into the declivity. Petiole with a median pair of diverging and slightly backward bent spines, whose reciprocal distance is somewhat twice the length of each spine, and a pair of shorter lateral spines, which are about half as long as the dorsal pair. First gastral tergite anteriorly concave.

Mandibles mostly smooth and shining, with superimposed elongate hair-bearing pits. Body and appendages reticulate-punctate; the sculpturation is stronger on the opaque head and mesosoma. Frons, vertex and scutum with superimposed longitudinal irregular rugulation.

The whole body and appendages with abundant, pale golden, fine standing hairs; longest hairs occur on cephalic dorsum, scapes, scutellum and gaster. Longest hairs on tibiae at most a little shorter than the maximum tibial width; longest hairs on scapes about twice as long as the maximum scape width. Pubescence pale, relatively short and abundant throughout the body, never hiding the sculpturation; on the gaster it is relatively short and moderately dense.

Body black, appendages chiefly dark brown. Mandibles apically ferrugineous as well as most of the antennal funiculi, whose 3 basalmost joints are proximally darkened.

Type Material
Rigato (2016) - Holotype gyne, SOMALIA (Revoil) [examined].