One of the two known collections of this species was from a pitfall trap in primary forest.
Bolton (1987) - A member of the M. malatu complex in the M. monomorium species group. M. affabile and Monomorium malatu are very closely related and eventually may even prove to be synonymous. Apart from a few minor differences (see below) the main discriminating features which presently separate the two are the dimensions and ratios, as follows.
- affabile TL 1.5. HW 0.34, CI 81, SL 0.30, SI 88, PW 0.22, AL 0.40.
- malatu TL 1.9-2.1, HW 0.38-0.46, CI 88-92, SL 0.33-0.38, SI 80-85, PW 0.26-0.28, AL 0.50-0.54.
Keys including this Species
Distribution based on Regional Taxon Lists
Distribution based on AntMaps
Distribution based on AntWeb specimens
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The following information is derived from Barry Bolton's New General Catalogue, a catalogue of the world's ants.
- affabile. Monomorium affabile Santschi, 1926b: 235, fig. 3 (w.) DEMOCRATIC REPUBLIC OF CONGO. See also: Bolton, 1987: 375.
Unless otherwise noted the text for the remainder of this section is reported from the publication that includes the original description.
Bolton (1987) - TL 1.5, HL 0.42, HW 0.34, CI 81, SL 0.30, SI 88, PW 0.22, AL 0.40.
Answering the description of malatu but smaller, with a narrower head and longer scapes; see comparative dimensions below. Clypeus constructed as in malatu but carinae sharply developed, divergent anteriorly and reaching the anterior margin at the anterolateral angles of the projecting portion of the clypeus. Maximum diameter of eye 0.24 x HW, and with 5 ommatidia in the longest row. With the head in full face view the sides subparallel.
Bolton (1987) - Holotype worker, Zaire: Banzyville (R. P. Augustin) (Naturhistorisches Museum, Basel) [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 375, see also)
- Santschi, F. 1926b. Description de nouveaux Formicides éthiopiens (IIIme partie). Rev. Zool. Afr. (Bruss.) 13: 207-267 (page 235, fig. 3 worker described)