Tetramorium transversarium

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

Nothing is known about the biology of Tetramorium transversarium.


A member of the Tetramorium scabrosum-species group.

Bolton (1977) - Most closely related to the Indian Tetramorium rugigaster but in that species the petiole is much less massively developed.


Distribution based on Regional Taxon Lists

Oriental Region: Sri Lanka (type locality).

Distribution based on AntMaps


Distribution based on AntWeb specimens

Check data from AntWeb




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

  • transversarium. Tetramorium transversarium Roger, 1863a: 181 (w.) SRI LANKA. See also: Bolton, 1977: 115.

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



Bolton (1977) - TL 3.0, HL 0.68, HW 0.64, CI 94, SL 0.46, SI 72, PW 0.48, AL 0.80.

Mandibles striate; anterior clypeal margin entire. Frontal carinae reaching back well beyond the level of the posterior margins of the eyes and forming the dorsal margins of the broad, shallow but conspicuous antennal scrobes. Eyes of moderate size, maximum diameter 0.14, about 0.22 x HW. Pronotal corners rounded in dorsal view. Propodeal spines strongly divergent in dorsal view, feebly curved; in profile appearing straight and acute, longer than the elongate-triangular metapleural lobes. Petiole node in profile massive, much larger than postpetiole. Anterior face of node vertical, the anterior half of the dorsum fiat, behind this the dorsum sloping to the short, straight posterior face. In dorsal view the petiole node massively transverse, its maximum width c. 0.40, almost as broad as the pronotum, its shape in dorsal view as shown in Fig. 40. Anterolateral angles of first gastral tergite produced forwards as a pair of low, rounded, blunt tubercles, not nearly so conspicuous as in other members of the group. Dorsum of head irregularly weakly rugulose, the spaces between rugulae with superficial punctulate ground-sculpture. Dorsal surfaces of alitrunk, petiole and post petiole irregularly and finely reticulate-rugulose. Basal one-third of first gastral tergite feebly rugulose and with traces of superficial punctulation. All dorsal surfaces of head and body with numerous elongate, fine hairs which are also present on the leading edge of the scape and the dorsal (outer) surface of the hind tibiae. Colour reddish brown.

I base my interpretation of this distinctive species upon a single specimen from Sri Lanka: Hakgalam, 1700 m, Hargala (Mussard, Besuchet, Lobl) at present housed in NM, Bas1e.

Type Material

Bolton (1977) - Syntype workers, Sri Lanka (location of types not known). It seems probable that the types of transversarium have been lost or destroyed.


References based on Global Ant Biodiversity Informatics

  • 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., 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.
  • 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.