Monomorium affabile

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Monomorium affabile
Scientific classification
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Hymenoptera
Family: Formicidae
Subfamily: Myrmicinae
Tribe: Solenopsidini
Genus: Monomorium
Species: M. affabile
Binomial name
Monomorium affabile
Santschi, 1926

Monomorium affabile casent0235532 p 1 high.jpg

Monomorium affabile casent0235532 d 1 high.jpg

Specimen Labels

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


Latitudinal Distribution Pattern

Latitudinal Range: -5.94905° to -5.94905°.

Tropical South

Distribution based on Regional Taxon Lists

Afrotropical Region: Democratic Republic of Congo (type locality), United Republic of Tanzania.

Distribution based on AntMaps


Distribution based on AntWeb specimens

Check data from AntWeb

Countries Occupied

Number of countries occupied by this species based on AntWiki Regional Taxon Lists. In general, fewer countries occupied indicates a narrower range, while more countries indicates a more widespread species.


Estimated Abundance

Relative abundance based on number of AntMaps records per species (this species within the purple bar). Fewer records (to the left) indicates a less abundant/encountered species while more records (to the right) indicates more abundant/encountered species.





The following information is derived from Barry Bolton's Online Catalogue of the Ants of the World.

  • affabile. Monomorium affabile Santschi, 1926b: 235, fig. 3B (w.) DEMOCRATIC REPUBLIC OF CONGO.
    • Type-material: holotype worker.
    • Type-locality: Democratic Republic of Congo (“Congo belge”): Banzyville (= Mobayi-Mbongo) (R.P. Augustin).
    • Type-depository: NHMB.
    • Status as species: Ettershank, 1966: 87; Bolton, 1987: 375 (redescription); Bolton, 1995b: 258.
    • Distribution: Democratic Republic of Congo.

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.

Type Material

Bolton (1987) - Holotype worker, Zaire: Banzyville (R. P. Augustin) (Naturhistorisches Museum, Basel) [examined].


References based on Global Ant Biodiversity Informatics

  • 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.