Tetramorium tricarinatum

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Tetramorium tricarinatum
Scientific classification
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Hymenoptera
Family: Formicidae
Subfamily: Myrmicinae
Tribe: Crematogastrini
Genus: Tetramorium
Species: T. tricarinatum
Binomial name
Tetramorium tricarinatum
Viehmeyer, 1914

Tetramorium tricarinatum castype06981 profile 1.jpg

Tetramorium tricarinatum castype06981 dorsal 1.jpg

Specimen labels

Synonyms

Nothing is known about the biology of Tetramorium tricarinatum.

Identification

Bolton (1977) - Closely related to Tetramorium pacificum, tricarinatum is easily separated from that species by its distinct colour and reduced sculpture. It is one of three bicoloured black and yellow species of Tetramorium found on New Guinea. One of these, Tetramorium diligens, belongs to the carinatum-group and has 11 antennal segments and a spatulate sting appendage, the other, Tetramorium bicolor, is very closely related but much less strongly sculptured.

Distribution

Distribution based on Regional Taxon Lists

Indo-Australian Region: New Guinea (type locality).


Distribution based on AntMaps

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Distribution based on AntWeb specimens

Check data from AntWeb

Biology

Castes

Nomenclature

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

  • tricarinatum. Tetramorium bicolor subsp. tricarinatum Viehmeyer, 1914c: 529, fig. 4 (w.) NEW GUINEA. Raised to species and senior synonym of tricolor: Bolton, 1977: 103.
  • tricolor. Xiphomyrmex tricolor Donisthorpe, 1949c: 753 (w.) NEW GUINEA. [Unresolved junior secondary homonym of Triglyphothrix tricolor Donisthorpe, above.] Junior synonym of tricarinatum: Bolton, 1977: 103.

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

Description

Worker

Bolton (1977) - TL 3.4-4.4, HL 0.86-1.06, HW 0.74-0.92, CI 84-89, SL 0.60-0.78, SI 81-89, PW 0.54-0.64, AL 1.00-1.20 (15 measured).

Mandibles smooth, unsculptured except for scattered pits. Clypeus with a median notch or impression. Median portion of clypeus with three strong longitudinal carinae. Frontal carinae extending back almost to the occiput. Maximum diameter of eye e. 0.17-0.20, about 0.22-0.24 x HW. Propodeal spines in profile long, narrow and acute; metapleural lobes broadly triangular, acute and somewhat upcurved. Petiole node in profile with the anterior face distinctly shorter than the posterior so that the convex dorsal surface slopes upwards posteriorly and the posterodorsal angle is on a higher level than the rounded anterodorsal angle. Sculpture of dorsum of head between frontal carinae consisting of three longitudinal carinae which in most specimens run uninterruptedly from clypeus almost to occiput. In some the lateral pair of carinae are interrupted or broken and in most specimens other short carinae or rugulae are present upon the dorsum. Some anastomosis of the rugulae or carinae may occur occipitally, but reticulate sculpture is absent. Ground sculpture between the carinae or rugae is very faint and the surfaces are mostly shiny. Dorsal alitrunk rugose, predominantly longitudinally in some, but with pronotal or other reticulation in others. Petiole and postpetiole rugose, usually longitudinal on dorsum but reticulate on the sides, less commonly reticulate everywhere. Gaster unsculptured. Long, erect or suberect hairs present on all dorsal surfaces of head and body. Colour conspicuous, head and gaster blackish brown to black, alitrunk and all appendages yellow or very light yellow-brown. Some of the larger workers also show patches of yellowish colour around the occipital margins of the head.

Type Material

Bolton (1977) - Syntype workers, New Guinea: Papua, Rawlinsongebirge (Berlin Museum für Naturkunde der Humboldt-Universität) [examined].

References