Monomorium noxitum

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Monomorium noxitum
Scientific classification
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Hymenoptera
Family: Formicidae
Subfamily: Myrmicinae
Tribe: Solenopsidini
Genus: Monomorium
Species: M. noxitum
Binomial name
Monomorium noxitum
Bolton, 1987

Monomorium noxitum casent0217888 p 1 high.jpg

Monomorium noxitum casent0217888 d 1 high.jpg

Specimen Labels

This species has been found in the leaf litter of rainforest habitats.


Bolton (1987) - A member of the M. strangulatum complex in the M. monomorium species group. Very closely related to Monomorium draxocum, the two are separated as follows:


  • HL 0.39-0.42, HW 0.32-0.35.
  • SL 0.32-0.36 (SI 100-109).
  • AL 0.44-0.46.
  • Maximum diameter of eye 0.21-0.24 x HW, with 5-6 ommatidia in longest row.
  • Legs very pale, conspicuously much lighter than alitrunk.
  • Propodeal spiracle of moderate size.
  • Alitrunk very dark brown.


  • HL 0.46-0.50, HW 0.37-0.40.
  • SL 0.39-0.42 (SI 103-105).
  • AL 0.54-0.58.
  • Maximum diameter of eye 0.22-0.26 x HW, with 6-7 ommatidia in longest row.
  • Legs only slightly lighter in colour than alitrunk.
  • Propodeal spiracle large.
  • Alitrunk light brown.

Keys including this Species


Distribution based on Regional Taxon Lists

Afrotropical Region: Cameroun (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.

  • noxitum. Monomorium noxitum Bolton, 1987: 403 (w.) CAMEROUN.

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



Holotype. TL 2.1, HL 0.49, HW 0.40, CI 82, SL 0.42, SI 105, PW 0.27, AL 0.56.

Answering the description of Monomorium draxocum holotype and with biconvex head as shown for Monomorium gabrielense (Fig. 76). Differing from draxocum holotype by having 7 ommatidia in the longest facet-row of the eye. The metanotal cross-ribs are much more distinct laterally than in draxocum and are not confused with the strong reticulate-punctate sculpture of the mesopleuron. Head and alitrunk brown, with blackish brown gaster; legs scarcely lighter in shade than alitrunk.

Paratypes. TL 2.0-2.1, HL 0.46-0.50, HW 0.37-0.40, CI 79-82, SL 0.39-0.42, SI 103-105, PW 0.24-0.27, AL 0.54-0.58 (8 measured). As holotype but maximum diameter of eye 0.22-0.26 x HW (0.23 x HW in holotype) and with 6-7 ommatidia in the longest row.

Type Material

Holotype worker, Cameroun: Nkoemvon, 1980 (D. Jackson) (The Natural History Museum). Paratypes, 8 workers with same data as holotype (BMNH; Museum of Comparative Zoology; Musee d'Histoire Naturelle Genève).