Mesostruma inornata

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Mesostruma inornata
Scientific classification
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Hymenoptera
Family: Formicidae
Subfamily: Myrmicinae
Tribe: Attini
Genus: Mesostruma
Species: M. inornata
Binomial name
Mesostruma inornata
Shattuck, 2000

Mesostruma inornata casent0172474 profile 1.jpg

Mesostruma inornata casent0172474 dorsal 1.jpg

Specimen labels

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 separated from the similar Mesostruma turneri by the irregular, very short rugae overlying the smooth integument of the first gastral tergite immediately posterior of the postpetiolar insertion (this area contains evenly spaced, elongate rugae over fine microreticulations in M. turneri) and the elongate head (CI < 95, the head of M. turneri is essentially square - CI 96 – 103).

Keys including this Species

Distribution

Heterick (2009) - Described from SA, in WA this species has been recorded south-east of Cocklebiddy and at Queen Victoria Spring Nature Reserve, east of Kalgoorlie, and may occur in the far south-east of the Province.

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

Nomenclature

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

  • inornata. Mesostruma inornata Shattuck, in Bolton, 2000: 51 (w.) AUSTRALIA.

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

Description

Worker

HOLOTYPE. TL 3.3, HL 0.81, HW 0.77, CI 95, ML 0.34, MI 42, SL 0.39, SI 51, PW 0.47, AL 0.87. Head longer than broad (CI 92 - 95), its posterior margin relatively deeply concave. In dorsal view the anterolateral pronotum rounded. Dorsum of mesosoma with dense, shallow foveolate punctures which are generally spaced less than their width apart, and with the area between the punctures covered with weak but distinct sculpturing. Propodeal lamellae broad, the dorsal margins flat to weakly convex, the posterior margins weakly concave, the angles between these margins slightly greater than 90 degrees. Sculpturing on the metapleural gland bulb uniformly reticulate-punctate. Postpetiole expanded laterally and wing-like. First gastral segment immediately posterior of the postpetiole with very short irregular rugae. Body colour uniform yellow-red.

Type Material

Holotype Specimen Labels

References