Tetramorium smithi

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Tetramorium smithi
Scientific classification
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Hymenoptera
Family: Formicidae
Subfamily: Myrmicinae
Tribe: Crematogastrini
Genus: Tetramorium
Species group: angulinode
Species: T. smithi
Binomial name
Tetramorium smithi
Mayr, 1879

Tetramorium smithi casent0178421 p 1 high.jpg

Tetramorium smithi casent0178421 d 1 high.jpg

Specimen Labels

Synonyms

Known from forest and disturbed habitats, e.g., roadside, village garden, Tetramorium smithi has been collected from a ground nest and litter samples.

Identification

Bolton (1977) - This small species is a member of the angulinode-group, otherwise confined to the Ethiopian region. Its small size, unsculptured mandibles and short antennal scapes immediately separate it from all other Tetramorium with 11-segmented antennae in the regions at present under consideration.

Keys including this Species

Distribution

Distribution based on Regional Taxon Lists

Indo-Australian Region: Borneo, Guam, Indonesia, Malaysia, Marshall Islands, Niue, Philippines.
Oriental Region: Bangladesh, India (type locality), Laos, Sri Lanka, Thailand, Vietnam.
Palaearctic Region: China, Japan.


Distribution based on AntMaps

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Distribution based on AntWeb specimens

Check data from AntWeb

Biology

Castes

Worker

Nomenclature

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

  • smithi. Tetramorium smithi Mayr, 1879: 673 (w.) INDIA. Imai, Baroni Urbani, et al. 1984: 8 (k.). Senior synonym of kanariense, laevinode: Bolton, 1977: 90.
  • kanariense. Tetramorium (Xiphomyrmex) smithi var. kanariense Forel, 1902c: 703 (w.) INDIA. Viehmeyer, 1916a: 139 (q.). Junior synonym of smithi: Bolton, 1977: 90.
  • laevinode. Tetramorium simillimum r. laevinode Forel, 1902c: 235 (w.) INDIA. Junior synonym of smithi: Bolton, 1977: 90.

Type Material

Bolton (1977) - Syntype workers, India: Calcutta (Rothney) (The Natural History Museum; Naturhistorisches Museum Wien, Vienna) [examined]. Unless otherwise noted the text for the remainder of this section is reported from the publication that includes the original description.

Description

Worker

Xu and Zheng (1994) - TL 2.4-2.8, HL 0.63-0.70, HW 0.58-0.69, CI 92-98, SL 0.41-0.16, SI 67-74, PW 0.44-0.55, AL 0.68-0.80, MDE 0.14-0.18 is (8 measured).

Bolton (1977) - TL 2.40-2.60, HL 0.60-0.68, HW 0.56-0.64, CI 89-97, SL 0.42-0.46, SI 69-75, PW 0.44-0.52, AL 0.68-0.76 (25 measured).

Mandibles unsculptured, smooth and shining with scattered small pits. Frontal carinae extending back beyond the level of the posterior margins of the eyes. Antennal scrobes shallow but quite broad and long enough to accommodate the scapes; the latter short, with SI < 80. Pronotum in dorsal view with the corners sharply angulate. Propodeum with a pair of spines, the metapleural lobes triangular, upcurved, acute apically. Petiole in dorsal view with the node as broad as or broader than long, the postpetiole distinctly broader than long. In profile the node of the petiole a roughly rectangular block, usually slightly higher than long, with parallel and near-vertical anterior and posterior faces, and the dorsum flat to feebly convex. Postpetiole lower and rounded dorsally. Head and dorsal alitrunk predominantly longitudinally rugose but with scattered, smaller cross-meshes which are not as conspicuous. Petiole usually sculptured dorsally, only very rarely with this sculpture completely effaced. Postpetiole and gaster without sculpture. Hairs numerous on all dorsal surfaces. Colour light to mid-brown, usually with the gaster darker.

Karyotype

  • 2n = 26 (India) (Imai et al., 1984).
  • 2n = 26 (Indonesia) (Imai et al., 1985).
  • 2n = 26 (Sarawak) (Tjan et al., 1986).

References