Monomorium dakarense

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Monomorium dakarense
Scientific classification
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Hymenoptera
Family: Formicidae
Subfamily: Myrmicinae
Tribe: Solenopsidini
Genus: Monomorium
Species: M. dakarense
Binomial name
Monomorium dakarense
Santschi, 1914

Monomorium dakarense casent0913570 p 1 high.jpg

Monomorium dakarense casent0913570 d 1 high.jpg

Specimen Labels

Nothing is known about the biology of Monomorium dakarense.


Bolton (1987) - A member of the M. australe complex in the M. salomonis species group. Associated with bicolor until the present, dakarense is best regarded as a distinct species. Apparently it was linked to Monomorium bicolor by Santschi (1914c) purely on the grounds of their similar colour, but he separated them by saying that in dakarense the scape was shorter and the psammophore better developed. The scape is indeed shorter in dakarense (SI 95-100) than in bicolor (SI 104-115), but also the former is considerably smaller (compare the measurements above with bicolor HL 0.70-0.93, HW 0.52-0.75, SL 0.56-0.78). The cephalic sculpture of bicolor is composed of sharply defined reticulate-punctation everywhere, and the first gastral tergite is less densely hairy.

M. dakarense is separated from its immediate allies by combining the distinctive colour scheme of the bicolor-complex with a lack of the reticulate-punctate cephalic sculpture usually associated with that colour scheme, replacing it by the silky punctulate-shagreenate sculpture generally associated with Monomorium sutu and its close relatives in the australe-complex. It is thus difficult to decide if dakarense is a member of the bicolor-complex (because of its colour) which has independently acquired the cephalic sculpture typical of sutu and allies, or if it is a member of the australe-complex which has acquired the bicolor-complex colour scheme. For the present I incline towards the latter as dakarense seems closer morphologically to Monomorium opacior, Monomorium parvinode and Monomorium minor than it does to any member of the bicolor-complex.

Keys including this Species


Distribution based on Regional Taxon Lists

Afrotropical Region: Senegal (type locality).

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.

  • dakarense. Monomorium bicolor st. dakarensis Santschi, 1914d: 353 (diagnosis in key) (w.) SENEGAL.
    • Type-material: syntype workers (number not stated, “many”).
    • Type-locality: Senegal: Longa (Roubaud).
    • Type-depository: NHMB.
    • [Misspelled as dakariense by Santschi, 1927d: 245.]
    • Subspecies of bicolor: Wheeler, W.M. 1922a: 869; Emery, 1922e: 176; Ettershank, 1966: 88.
    • Subspecies of subopacum: Santschi, 1927d: 245.
    • Status as species: Bolton, 1987: 339 (redescription); Bolton, 1995b: 260.
    • Distribution: Senegal.

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



Bolton (1987) - TL 2.2-2.3, HL 0.57-0.59, HW 0.44-0.47, CI 77-80, SL 0.44-0.45, SI 95-100, PW 0.30-0.31, AL 0.66-0.70 (3 measured).

Maximum diameter of eye 0.23-0.24 x HW, with 7-8 ommatidia in the longest row. Distribution of pilosity as in bicolor but first gastral tergite with numerous standing hairs in front of the apical transverse row. Head under low magnification appearing uniformly finely granular; under higher magnification the entire dorsum opaque, very finely and densely punctulate-shagreenate and having a silky appearance. Alitrunk, petiole and postpetiole finely densely reticulate-punctate. First gastral tergite shagreenate. Head and alitrunk orange-yellow to dull orange-brown, the gaster blackish brown, the two colours strongly contrasting.

Type Material

Bolton (1987) - Syntype workers, Senegal: Longa (Roubaud) (Naturhistorisches Museum, Basel) [examined].


References based on Global Ant Biodiversity Informatics

  • Diame L., B. Taylor, R. Blatrix, J. F. Vayssieres, J. Y. Rey, I. Grechi, and K. Diarra. 2017. A preliminary checklist of the ant (Hymenoptera, Formicidae) fauna of Senegal. Journal of Insect Biodiversity 5(15): 1-16.