Nothing is known about the biology of Monomorium orangiae.
Bolton (1987) - A member of the M. tchelichofi complex in the M. salomonis species group. Very close to Monomorium tchelichofi, orangiae is separated by its feebler alitrunk sculpture, unsculptured postpetiole node and more sharply defined lateral propodeal margins.
Keys including this Species
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.
- orangiae. Monomorium (Xeromyrmex) orangiae Arnold, 1956: 67, fig. 16 (w.) SOUTH AFRICA. See also: Bolton, 1987: 354.
Unless otherwise noted the text for the remainder of this section is reported from the publication that includes the original description.
Bolton (1987) - TL 3.7-4.0, HL 0.92-0.98, HW 0.76-0.80, CI 81-83, SL 0.78-0.79, SI 98-102, PW 0.44-0.48, AL 1.02-1.06 (3 measured).
Anterior margin of median portion of clypeus broadly and evenly concave. With the head in full-face view the sides evenly convex, broadest at the midlength and converging anteriorly and posteriorly. Maximum diameter of eye 0.21-0.22 x HW and with 10-12 ommatidia in the longest row, the eyes appearing small on the sides of the relatively massive broad head. Outline of promesonotum in profile shallowly convex, the mesonotum sloping posteriorly to the distinctly impressed metanotal groove. Propodeum fiat to shallowly transversely concave dorsally, the dorsum separated from the sides by conspicuous narrowly rounded margins. Petiole node cuneate in profile, narrowly rounded dorsally. In dorsal view both nodes narrow and strongly transverse, much broader than long. Cephalic dorsum with 2-3 pairs of hairs straddling the midline behind the level of the frontal lobes; without hairs close to the occipital corners. Dorsal alitrunk without standing hairs. Petiole with one pair and postpetiole with 1-2 pairs of backward directed hairs. First gastral tergite with 2-3 pairs of hairs in front of the apical transverse row. Head smooth, unsculptured except for vestigial superficial reticular patterning; promesonotal dorsum similarly sculptured. Propodeal dorsum with very feeble reticulate-shagreenate sculpture or only vestigially shagreenate. Node of postpetiole unsculptured dorsally, the first gastral tergite unsculptured or with fine superficial reticular patterning. Colour uniform glossy dark brown.
Bolton (1987) - Paratype workers, South Africa: Orange River, Kakamas, 3.xii. 1953 (R. H. N. Smithers) (The Natural History Museum) [examined].
- Bolton, B. 1987. A review of the Solenopsis genus-group and revision of Afrotropical Monomorium Mayr (Hymenoptera: Formicidae). Bulletin of the British Museum (Natural History). Entomology. 54: 263-452. PDF (page 67, fig. 16 worker described)
- Bolton, B. 1987. A review of the Solenopsis genus-group and revision of Afrotropical Monomorium Mayr (Hymenoptera: Formicidae). Bull. Br. Mus. (Nat. Hist.) Entomol. 54: 263-452 (page 354, see also)