Tetramorium opacum

AntWiki - Where Ant Biologists Share Their Knowledge
Jump to: navigation, search
Tetramorium opacum
Scientific classification
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Hymenoptera
Family: Formicidae
Subfamily: Myrmicinae
Tribe: Crematogastrini
Genus: Tetramorium
Species: T. opacum
Binomial name
Tetramorium opacum
(Emery, 1909)

Rhoptromyrmex opacus casent0281191 p 1 high.jpg Rhoptromyrmex opacus casent0281191 d 1 high.jpg

Specimen Labels



Keys including this Species


Distribution based on Regional Taxon Lists

Afrotropical Region: Cameroun (type locality), Guinea, Kenya.

Check distribution from AntMaps.

Distribution based on specimens

Loading map...

The above specimen data are provided by AntWeb. Please see Tetramorium opacum for further details




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

  • opacum. Rhoptromyrmex opacus Emery, in Forel, 1909b: 59 (footnote) (w.) CAMEROUN. Combination in Tetramorium: Ward et al., 2014: 15. Bolton, 1986a: 15 (q.m.). Senior synonym of esta, laeviceps, monodi: Brown, 1964c: 15.
  • esta. Rhoptromyrmex opacus var. esta Forel, 1909b: 59 (w.q.m.) DEMOCRATIC REPUBLIC OF CONGO. Junior synonym of opacus: Brown, 1964c: 15.
  • laeviceps. Rhoptromyrmex opacus var. laeviceps Santschi, 1916b: 504 (w.) DEMOCRATIC REPUBLIC OF CONGO. Junior synonym of opacus: Brown, 1964c: 15.
  • monodi. Rhoptromyrmex opacus r. monodi Bernard, 1953b: 251, fig. 14 (w.) GUINEA. Junior synonym of opacus: Brown, 1964c: 15.


Worker with predominantly fine, opaque reticulate-punctulate sculpture over head and mesonotum; in some smaller specimens, the cephalic sculpture may be more shallow and more nearly shining. Metanotal groove present, moderately to deeply impressed. Petiolar node moderate in height, with broadly rounded summit; postpetiole subglobular, slightly wider than petiolar node and wider than long, its ventral surface without a prominent rounded process or tumulus. Color dull yellow to brownish-orange; according to Bernard, the type of subsp. monodi has the occiput and mesonotum blackish-brown. (after Brown, 1964i).