Mesostruma exolympica

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Mesostruma exolympica
Scientific classification
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Hymenoptera
Family: Formicidae
Subfamily: Myrmicinae
Tribe: Attini
Genus: Mesostruma
Species: M. exolympica
Binomial name
Mesostruma exolympica
Taylor, 1973

Mesostruma exolympica casent0172473 profile 1.jpg

Mesostruma exolympica casent0172473 dorsal 1.jpg

Specimen labels

This is one of the most commonly collected species in the genus. Ants in the genus Mesostruma are uncommon and form small colonies in soil, usually under or between rocks. They are predacious, foraging primarily on the ground in leaf litter but also occasionally on low vegetation. Roughly half the species have only been collected once. The remainder of the species are not well known either, at least in terms of the number of collections and what is known regarding their biology.

Identification

This species can be recognised by the combination of the form of sculpturing on the dorsum of the mesosoma, the relatively broad head and narrow pronotum, and the configuration of the propodeal lamellae.

Keys including this Species

Distribution

Distribution based on Regional Taxon Lists

Australasian Region: Australia (type locality).

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.

  • exolympica. Mesostruma exolympica Taylor, 1973: 35, pl. 6 (w.q.) AUSTRALIA. See also: Shattuck, in Bolton, 2000: 50.

Type Material

Holotype Specimen Labels

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

Description

Worker

Shattuck (2000) - TL 3.3 - 4.2, HL 0.70 - 0.86, HW 0.65 - 0.82, CI 92 - 96, ML 0.30 - 0.35, MI 41 - 46, SL 0.43 - 0.48, SI 59 - 64, PW 0.44 - 0.58, AL 0.79 - 1.00. Head relatively broad (CI > 90), its posterior margin shallowly concave. Pronotum relatively narrow (about 0.58-0.62 times mesosoma length), in dorsal view its anterolateral corners rounded. Dorsum of mesosoma with scattered, shallow foveolate punctures which are spaced more than their width apart, the area between the punctures smooth and lacking sculpturing. Propodeal lamellae with the dorsal margins flat to weakly concave, the posterior margins strongly concave, the angles between these margins acute, less than 90 degrees. Sculpturing on the metapleural gland bulb consisting of a mosaic of indistinct rugae, punctures and small smooth areas. Postpetiole expanded laterally and wing-like. First gastral segment immediately posterior of the postpetiole with short, indistinct rugae. Body yellow-red to red-brown, appendages slightly lighter, gaster with a dark band across the posterior section of the first tergite (more obvious in lightly coloured individuals, less distinct in darker individuals).

References

  • Bolton, B. 2000. The ant tribe Dacetini. Mem. Am. Entomol. Inst. 65: 1-1028 (page 50, see also)
  • Shattuck, S. O. 2000. Genus Colobostruma. Genus Mesostruma. Genus Epopostruma. Pp. 31-67 in: Bolton, B. The ant tribe Dacetini. Mem. Am. Entomol. Inst. 65: 1-1028 (page 63, worker, queen described)
  • Taylor, R. W. 1973. Ants of the Australian genus Mesostruma Brown (Hymenoptera: Formicidae). J. Aust. Entomol. Soc. 12: 24-38 (page 35, pl. 6 worker, queen described)