Nothing is known of the biology of this species, but a lone female without wings was found in South Africa in March (Bolton 1973)
Keys including this Species
- Key to Afrotropical Polyrhachis species
- Key to Afrotropical Polyrhachis species (Bolton 1973, OUTDATED)
Distribution based on Regional Taxon Lists
Distribution based on AntMaps
Distribution based on AntWeb specimens
Check data from AntWeb
The following information is derived from Barry Bolton's New General Catalogue, a catalogue of the world's ants.
- gamaii. Polyrhachis (Myrma) gamaii Santschi, 1917b: 295 (q.) SOUTH AFRICA. Arnold, 1947: 136 (w.). See also: Bolton, 1973b: 351.
Unless otherwise noted the text for the remainder of this section is reported from the publication that includes the original description.
Bolton (1973) - TL 7.7-8.5, HL 1.81-1.97, HW 1.70-2.08, CI 94-105, SL 1.81-2.08, SI 100-106, PW 1.18-1.48, MTL 2.37-2.59. (6 measured.)
Head truncated in front so that the clypeus is almost vertical, its anterior margin entire. Sides of head convex, the convex eyes situated well up from the ventrolateral margin, not breaking the outline of the sides of the head in full-face view. Pronotum and mesonotum not marginate, the dorsal surfaces rounding into the sides; propodeum marginate laterally. Humeral angles of the pronotum without spines but projecting as bluntly rounded tubercles. Propodeum with a pair of thick, tuberculiform teeth, directed upwards and weakly outwards. Promesonotal suture distinct; the mesoscutellum present on the dorsum, separated from the scutum in front and the propodeum behind by a pair of weakly raised, transverse carinae, best seen in profile. Petiole armed with a dorsal pair of long straight spines whose apices curve slightly inwards in front view, and with a laterally placed pair of acute teeth. The subpetiolar process is developed anteriorly into a dentiform lobe.
Erect hairs present only on the mandibles, clypeus and the apex of the gaster. A fine, sparse pubescence is present on the antennal scapes, the legs, and the first gastral segment in some individuals.
Sculpturation of head varying above the eyes from finely reticulate-punctate to superficially reticulate. The alitrunk dorsally finely reticulate to reticulate-punctate; the sides and the petiole more coarsely so. Declivity of propodeum and gaster very faintly and finely, superficially reticulate. Colouration a variable mixture of black, black-brown, red, and red-brown. Head black with red-brown mandibles, the antennal scapes red-brown or black. Alitrunk varying from red-brown with large infuscated areas to mostly black with weak red-brown or black-brown patches. The sides of the alitrunk usually red-brown but variously infuscated. Petiole and gaster varying from red-brown to black-brown; legs usually red-brown. In general the larger individuals tend to have more black and less red on the alitrunk than do the smaller forms.
Bolton (1973) - In general body form and sculpturation the differences between the female and the workers are only as expected between the two castes, but the female is distinctly more pilose and has the petiolar spines disproportionally spaced in comparison to the worker. Marked similarities include the head shape, development of pronotal tubercles and propodeal teeth, form of petiole, and the presence of a dentiform subpetiolar process.
Bolton (1973) - Holotype queen, SOUTH AFRICA : Natal, Durban (H. B. Marley) (probably in NM, Basle).
- Arnold, G. 1947. New species of African Hymenoptera. No. 7. Occas. Pap. Natl. Mus. South. Rhod. 2: 131-167 (page 136, worker described)
- Bolton, B. 1973b. The ant genus Polyrhachis F. Smith in the Ethiopian region (Hymenoptera: Formicidae). Bulletin of the British Museum (Natural History) Entomology. 28:283-369. PDF (page 351, see also)
- Santschi, F. 1917b . Fourmis nouvelles de la Colonie du Cap, du Natal et de Rhodesia. Ann. Soc. Entomol. Fr. 85: 279-296 (page 295, queen described)