Tetramorium tortuosum

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Tetramorium tortuosum
Scientific classification
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Hymenoptera
Family: Formicidae
Subfamily: Myrmicinae
Tribe: Crematogastrini
Genus: Tetramorium
Species group: tortuosum
Species: T. tortuosum
Binomial name
Tetramorium tortuosum
Roger, 1863

Tetramorium tortuosum casent0280879 p 1 high.jpg

Tetramorium tortuosum casent0280879 d 1 high.jpg

Specimen Labels


A Sri Lanka specimen was found under a stone.


Bolton (1977) - This species is close to Tetramorium yerburyi and Tetramorium pilosum; its distinction from those species is discussed under yerburyi.

Keys including this Species


Latitudinal Distribution Pattern

Latitudinal Range: 13.083889° to 6.916667°.

Tropical South

Distribution based on Regional Taxon Lists

Indo-Australian Region: Philippines.
Oriental Region: India, Sri Lanka (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.


Association with Other Organisms

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  • This species is a host for the cestode Raillietina echinobothrida (a parasitoid) (Quevillon, 2018) (encounter mode secondary; indirect transmission; transmission outside nest).
  • This species is a host for the cestode Raillietina tetragona (a parasitoid) (Quevillon, 2018) (encounter mode secondary; indirect transmission; transmission outside nest).



. Owned by Museum of Comparative Zoology.


The following information is derived from Barry Bolton's Online Catalogue of the Ants of the World.

  • tortuosum. Tetramorium tortuosum Roger, 1863a: 181 (w.q.) SRI LANKA. Senior synonym of bellii, ethica: Bolton, 1977: 83.
  • bellii. Tetramorium (Xiphomyrmex) tortuosum var. bellii Forel, 1902c: 239 (w.) INDIA. Junior synonym of tortuosum: Bolton, 1977: 83.
  • ethica. Tetramorium (Xiphomyrmex) tortuosum var. ethica Forel, 1911i: 225 (w.) SRI LANKA. Junior synonym of tortuosum: Bolton, 1977: 83.

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



Bolton (1977) - TL 3.8-4.4, HL 0.82-0.92, HW 0.78-0.86, CI 89-95, SL 0.70-0.80, SI 89-97, PW 0.60-0.70, AL 1.12-1.20 (15 measured).

Mandibles striate. Antennal sea pes moderately long, with SI approaching 100 but apparently always with HW> SL. Frontal carinae long, reaching back almost or quite to the occipital margin, the latter broadly and very shallowly concave. Antennal scrobes shallow and feeble impressions, shorter than the scape and not capable of containing it. Pronotal corners in dorsal view with rounded angles. Propodeal spines strong and acute, the metapleural teeth acute and generally triangular, but narrow in some specimens. Node of petiole in profile longer than high, the dorsal surface feebly convex and meeting the anterior face in a blunt but distinct angle. Post petiole rounded, convex above. In dorsal view the petiole node slightly longer than broad, the postpetiole subglobular and somewhat broader than long. Dorsum of head firmly and predominantly longitudinally rugulose but with a tendency to form narrow and feeble cross-meshes, especially posteriorly. The rugulae themselves are narrow, low and rounded. Dorsal alitrunk with similar but even more feeble rugulation, in places the rugulae tending to be effaced and replaced by shining areas. Sides of petiole usually retaining faint traces of sculpture but the dorsum generally smooth, only rarely with vestiges of sculpture. Postpetiole and gaster unsculptured. Hairs on dorsal head and alitrunk variable in length, usually shorter and stouter in Sri Lankan populations than in examples from India.

Type Material

Bolton (1977) - Syntype worker, female, Sri Lanka (H. Nietner) (location of types not known).


References based on Global Ant Biodiversity Informatics

  • Basu P. 1994. Ecology of ground foraging ants in a tropical evergreen forest in Western Ghats, India. PhD Thesis, School of ecology and environmental sciences, Pondichery University, India. 155 pages.
  • Bolton B. 1977. The ant tribe Tetramoriini (Hymenoptera: Formicidae). The genus Tetramorium Mayr in the Oriental and Indo-Australian regions, and in Australia. Bulletin of the British Museum (Natural History). Entomology 36:67-151.
  • Bolton, B. "The ant tribe Tetramoriini (Hymenoptera: Formicinae. The genus Tetramorium Mayr in the Oriental and Indo-Australian regions and in Australia." Bulletin of the British Museum (National History): Entomology series 36, no. 2 (1977): 68-151.
  • Chapman, J. W., and Capco, S. R. 1951. Check list of the ants (Hymenoptera: Formicidae) of Asia. Monogr. Inst. Sci. Technol. Manila 1: 1-327
  • Dias R. K. S. 2002. Current knowledge on ants of Sri Lanka. ANeT Newsletter 4: 17- 21.
  • Dias R. K. S. 2006. Current taxonomic status of ants (Hymenoptera: Formicidae) in Sri Lanka. The Fauna of Sri Lanka: 43-52. Bambaradeniya, C.N.B. (Editor), 2006. Fauna of Sri Lanka: Status of Taxonomy, Research and Conservation. The World Conservation Union, Colombo, Sri Lanka & Government of Sri Lanka. viii + 308pp.
  • Dias R. K. S. 2013. Diversity and importance of soil-dweeling ants. Proceedings of the National Symposium on Soil Biodiversity, chapt 4, pp 19-22.
  • Dias R. K. S., K. R. K. A. Kosgamage, and H. A. W. S. Peiris. 2012. The Taxonomy and Conservation Status of Ants (Order: Hymenoptera, Family: Formicidae) in Sri Lanka. In: The National Red List 2012 of Sri Lanka; Conservation Status of the Fauna and Flora. Weerakoon, D.K. & S. Wijesundara Eds., Ministry of Environment, Colombo, Sri Lanka. p11-19.
  • Dias R. K. S., and K. R. K. Anuradha Kosgamage. 2012. Occurrence and species diversity of ground-dwelling worker ants (Family: Formicidae) in selected lands in the dry zone of Sri Lanka. J. Sci. Univ. Kelaniya 7: 55-72.
  • Dias R. K. S., and R. P. K. C. Rajapaksa. 2016. Geographic records of subfamilies, genera and species of ants (Hymenoptera: Formicidae) in the four climatic zones of Sri Lanka: a review. J. Sci. Univ. Kelaniya 11(2): 23-45.
  • Emery C. 1893. Voyage de M. E. Simon à l'île de Ceylan (janvier-février 1892). Formicides. Annales de la Société Entomologique de France 62: 239-258.
  • Forel A. 1903. Les Formicides de l'Empire des Indes et de Ceylan. Part X. J. Bombay Nat. Hist. Soc. 14: 679-715.
  • Forel A. 1904. Fourmis du Musée de Bruxelles. Ann. Soc. Entomol. Belg. 48: 168-177.
  • Forel A. 1911. Ameisen aus Ceylon, gesammelt von Prof. K. Escherich (einige von Prof. E. Bugnion). Pp. 215-228 in: Escherich, K. Termitenleben auf Ceylon. Jena: Gustav Fischer, xxxii + 262 pp.
  • Forel A. 1913k. Wissenschaftliche Ergebnisse einer Forschungsreise nach Ostindien ausgeführt im Auftrage der Kgl. Preuss. Akademie der Wissenschaften zu Berlin von H. v. Buttel-Reepen. II. Ameisen aus Sumatra, Java, Malacca und Ceylon. Gesammelt von Herrn Prof. Dr. v. Buttel-Reepen in den Jahren 1911-1912. Zoologische Jahrbücher. Abteilung für Systematik, Geographie und Biologie der Tiere 36:1-148.
  • General D. M., and G. D. Alpert. 2012. A synoptic review of the ant genera (Hymenoptera, Formicidae) of the Philippines. Zookeys 200: 1-111.
  • Mathew R., and R. N. Tiwari. 2000. Insecta: Hymenoptera: Formicidae. Pp. 251-409 in: Director; Zoological Survey of India (ed.) 2000. Fauna of of Meghalaya. Part 7. [State Fauna Series 4.] Insecta 2000. Calcutta: Zoological Survey of India, 621 pp.
  • Tak N., and S. I. Kazmi. 2013. On some ants (Insecta: Hymenoptera: Formicidae) from Nagaland, India. Rec. zool. Surv. India: 113(1): 169-182.
  • Tiwari R. N., B. G. Kundu, S. Roy Chowdhury, and S. N. Ghosh. 2003. Insecta: Hymenoptera: Formicidae. Fauna of Sikkim. Part 4. State Fauna Series. 9.Zool.Surv.India. i-iii, 1-512. Chapter pagination: 467-506.