Monomorium borlei

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Monomorium borlei
Scientific classification
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Hymenoptera
Family: Formicidae
Subfamily: Myrmicinae
Tribe: Solenopsidini
Genus: Monomorium
Species: M. borlei
Binomial name
Monomorium borlei
Santschi, 1937

Monomorium borlei casent0913564 p 1 high.jpg

Monomorium borlei casent0913564 d 1 high.jpg

Specimen Labels

One of the few known collections of this species was found in a forest litter sample.


Bolton (1987) - A member of the M. leopoldinum complex in the M. monomorium species group. Related to Monomorium leopoldinum (=Monomorium madecassum) but differentiated by its longer scapes and much sparser pilosity, borlei is known only from the type-series. Originally described as a variety of Monomorium springvalense, borlei is very close indeed to that species but is darker in colour, has a larger propodeal spiracle and 3 pairs of standing hairs on the promesonotum.

Keys including this Species


Distribution based on Regional Taxon Lists

Afrotropical Region: Angola (type locality).

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.

  • borlei. Monomorium (Monomorium) springvalense var. borlei Santschi, 1937d: 227, figs. 22-24 (w.) ANGOLA. Raised to species: Bolton, 1987: 381.

Unless otherwise noted the text for the remainder of this section is reported from the publication that includes the original description.



Bolton (1987) - TL 1.9-2.0, HL 0.50-0.52, HW 0.40-0.41, CI 79-80, SL 0.36-0.38, SI 90-93, PW 0.25-0.26, AL 0.54-0.56 (2 measured).

Median portion of clypeus sharply prominent anteriorly, the anterior and lateral borders of the prominence separated by obtuse but sharp angles and the anterior margin between the angles shallowly concave. Clypeal carinae moderately sharply defined, widely divergent anteriorly. Maximum diameter of eyes 0.22-0.24 x HW and with 7 ommatidia in the longest row. With the head in full-face view the eyes in front of the midlength of the sides and the antennal scapes, when laid straight back, failing to reach the occipital margin. In full-face view the sides of the head very feebly convex, the occipital margin broad and transverse to extremely shallowly concave. Promesonotum in profile convex anteriorly, the mesonotum posteriorly almost flat and sloping evenly to the narrow but distinctly impressed metanotal groove. Propodeal dorsum behind the metanotal groove following the same slope as the mesonotum; rounding broadly into the declivity. Propodeal spiracle large and dominating the side of the sclerite. Petiole with a low flange-like ventral process, the node bluntly subconical. Node of postpetiole lower than that of petiole, broader and more broadly rounded above. In dorsal view both nodes conspicuously broader than long. Standing hairs sparsely present on all dorsal surfaces of head and body; the promesonotum with 3 pairs, propodeum with 1 pair, petiole and postpetiole each with 1 pair. Almost entirely smooth and unsculptured except for hair-pits; the metanotal groove with short but sharply defined cross-ribs and the mesopleuron with a transverse strip of vestigial sculpture. Colour a uniform glossy dark brown.

Type Material

Bolton (1987) - Syntype workers, Angola: Sangeve, 1932-33, no. 1 10 (A. Monard) (Naturhistorisches Museum, Basel) [examined].