Crematogaster mimosae

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Crematogaster mimosae
Scientific classification
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Hymenoptera
Family: Formicidae
Subfamily: Myrmicinae
Tribe: Crematogastrini
Genus: Crematogaster
Species: C. mimosae
Binomial name
Crematogaster mimosae
Santschi, 1914

Crematogaster mimosae casent0904507 p 1 high.jpg

Crematogaster mimosae casent0904507 d 1 high.jpg

Specimen Labels


One of four ant species (also Crematogaster gerstaeckeri sjostedti, Crematogaster nigriceps, Tetraponera penzigi) that live on Acacia drepanolobium. This small arboreal ant assemblage, nesting in this dominant Africa savanna tree, have been the subject of intensive research by a large group of ecologists studying species interactions and species co-existence (e.g., Young et al. 1997; Martins 2010).



Sharaf et al. (2019): Initially described from Kenya, in the Afrotropics this species is East African in its distribution found in Kenya, Uganda, Somalia, Sudan, and Tanzania (Guénard et al. 2017; Janicki et al. 2017). In the Arabian Peninsula, it was recorded from the KSA, Oman, the UAE and Yemen (Collingwood 1985, Collingwood and Agosti 1996; Borowiec 2014; Sharaf et al. 2018).

Distribution based on Regional Taxon Lists

Afrotropical Region: Kenya (type locality), Saudi Arabia, United Arab Emirates, Yemen.
Palaearctic Region: Oman.

Distribution based on AntMaps


Distribution based on AntWeb specimens

Check data from AntWeb


C. mimosae depends on the domatia provided by the plant for brood rearing and are never found free living separately from the acacias. Ants patrol all parts of the tree above the ground and directly prey on invertebrates and repel browsing herbivores.

Workers tend phloem-feeding scale insects, presumably imposing a cost on host plants that partly offsets the protection given against mammalian herbivores. Trees occupied by C. mimosae had significantly less browsing by giraffes and black rhino than trees occupied by other ant species (Martins 2010).

Swollen thorns of Acacia drepanolobium inhabited by Crematogaster. From Kitengela, Kenya. Photo by Christian Peeters.
Swollen thorns of Vachellia (Acacia) drepanolobium
C. mimosae workers and brood inside a domatia (swollen thorn), showing also carton partitions. Photo by Christian Peeters



The following information is derived from Barry Bolton's New General Catalogue, a catalogue of the world's ants.

  • mimosae. Crematogaster mimosae Santschi, 1914b: 87, fig. 11 (w.) KENYA. Menozzi, 1939c: 105 (q.). Combination in C. (Crematogaster): Wheeler, W.M. 1922a: 841; in C. (Acrocoelia): Emery, 1922e: 148; in C. (Crematogaster): Bolton, 1995b: 166. Current subspecies: nominal plus tenuipilis.

Taxonomic Notes

Sharaf et al. (2019): From a taxonomic perspective, this is one of the “easy” cases within the genus in Arabia, thus very straightforwardly identifiable.