Tetramorium dolichosum

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Tetramorium dolichosum
Scientific classification
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Hymenoptera
Family: Formicidae
Subfamily: Myrmicinae
Tribe: Crematogastrini
Genus: Tetramorium
Species: T. dolichosum
Binomial name
Tetramorium dolichosum
Bolton, 1980

Tetramorium dolichosum castype13388 profile 1.jpg

Specimen labels

Nothing is known about the biology of Tetramorium dolichosum.


Bolton (1980) - This slender species with very long scapes is most closely related to Tetramorium perlongum, and its separation from that species is discussed there. These two species together form a compact pair within the setigerum-group characterized by their narrow heads (CI 75 or less), long scapes (SI > 150), short frontal carinae and low, rounded metapleural lobes.

Keys including this Species


Distribution based on Regional Taxon Lists

Afrotropical Region: Democratic Republic of Congo (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.

  • dolichosum. Tetramorium dolichosum Bolton, 1980: 277 (w.) 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.



Holotype: TL 4.6, HL 1.06, HW 0.79, CI 75, SL 1.22, SI 154, PW 0.60, AL 1.26. Paratypes (2 measured): TL 4.3—4.7, HL 1.04-1.08, HW 0.77-0.81, CI 74-75, SL 1.22-1.31, SI 158-162, PW 0.56-0.60, AL 1.22-1.30. Maximum diameter of eye 0.22-0.24, about 0.28-0.30 x HW.

Mandibles longitudinally striate. Anterior clypeal margin entire, without a median impression. Median clypeal carina running the length of the clypeus. Frontal carinae short, running back to a level just behind the posterior margins of the eyes. The carinae strongly developed throughout their length, close together (their maximum separation only about 0.38 x HW), terminating abruptly in a strong, rugoreticulum. Antennal scapes very long, SI > 150; antennal scrobes absent. Maximum diameter of eye 0.22, about 0.28 x HW. In full-face view the occipital margin evenly concave, bordered by a raised rim or flange; head elongate and narrow, CI above. Masticatory margin of mandible armed with three teeth followed by a series of 6 denticles. With the alitrunk in profile the promesonotum evenly convex, sloping posteriorly to a weakly impressed metanotal groove. Propodeal dorsum approximately flat but with a very low tumulus just posterior to the metanotal groove. Propodeal spines elongate, narrow and acute. Metapleural lobes low and rounded. Petiole in profile with a long peduncle, the node with rounded antero- and posterodorsal angles and a gently convex dorsum. Postpetiole evenly convex. Dorsum of head coarsely and densely reticulatepunctate and with conspicuous rugular sculpture which forms a strong reticulum behind the level of the eyes. Dorsum and sides of alitrunk reticulate-punctate, the former also with disorganized but strong rugulae. Petiole, postpetiole and base of first gastral segment finely and densely reticulate-punctulate. All dorsal surfaces of head and body with numerous strong hairs which are blunt apically. Appendages without such hairs, only with fine appressed pubescence. Colour uniform dark brown.

Paratypes: As holotype but one paratype having 3 teeth plus 7 denticles on the mandible as opposed to 3+6 in holotype and the other paratype.

Type Material

Holotype worker, Zaire (‘B. Congo’ on data label): 14 miles (23 km] NW. of Mutshatsha, 30.i.1958, 1200 m (E. S. Ross & R. E. Leech) (California Academy of Sciences). Paratypes. Two workers with same data as holotype (CASC; The Natural History Museum).