Iridomyrmex macrops

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Iridomyrmex macrops
Scientific classification
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Hymenoptera
Family: Formicidae
Subfamily: Dolichoderinae
Genus: Iridomyrmex
Species: I. macrops
Binomial name
Iridomyrmex macrops
Heterick & Shattuck, 2011

Iridomyrmex macrops side view

Iridomyrmex macrops top view

This ant is much more occasional in its occurrence than I. dromus, but is likely to have a similar ecology. One worker from the Holland Track, east of Hyden, Western Australia, was hand collected at night, foraging in heathy sandplain, and specimens taken SSW of Coolgardie, Western Australia, were collected from mallee trunks.

Identification

The large-eyed I. macrops resembles a hairy Iridomyrmex dromus. Erect setae are present on the hind tibiae, the sides of the head and (in some specimens only) the antennal scape.

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.

  • macrops. Iridomyrmex macrops Heterick & Shattuck, 2011: 99, figs. 48, 91 (w.) AUSTRALIA.

Type Material

Description

Worker Description. Head. Posterior margin of head weakly convex to planar; erect setae on posterior margin in full-face view set in a row; sides of head noticeably convex, or straight or weakly convex; erect genal setae present on sides of head in full-face view. Ocelli absent; in full-face view, eyes set at about midpoint of head capsule; in profile, eye set anteriad of head capsule; eye asymmetrical, curvature of inner eye margin more pronounced than its outer margin and anterior sector of eye distinctly broader than its posterior sector. Frontal carinae straight; antennal scape surpassing posterior margin of head by 0.2–0.5 x its length. Erect setae on scape present and abundant, or present and sparse, or absent, except at tip; prominence on anteromedial clypeal margin present as an indistinct swelling or undulation; mandible elongate triangular with oblique basal margin; long, curved setae on venter of head capsule absent. Mesosoma. Pronotum moderately and evenly curved over its length. Erect pronotal setae numerous (12 or more), short and bristly. Mesonotum straight. Erect mesonotal setae moderate in number (6–12), short and bristly. Mesothoracic spiracles always inconspicuous; propodeal dorsum smoothly and evenly convex, or straight and short (equal in length to propodeal declivity); placement of propodeal spiracle mesad, more than its diameter away from propodeal declivity; propodeal angle weakly present or absent, the confluence of the dorsal and declivitous propodeal faces indicated, if at all, by an undulation. Erect propodeal setae numerous (12 or more), short and bristly. Petiole. Dorsum of node convex; node thin, scale-like, orientation more-or-less vertical. Gaster. Non-marginal erect setae of gaster present on first gastral tergite; marginal erect setae of gaster present on first tergite. General characters. Allometric differences between workers of same nest absent. Colour yellow, with or without brownish infuscation of the head and a yellowish-brown gaster. Colour of erect setae yellow, same colour as body.

Measurements. Worker (n = 5)—CI 78–82; EI 37–46; EL 0.22–0.36; EW 0.15–0.26; HFL 0.94–1.63; HL 0.73–1.00; HW 0.60–0.80; ML 0.99–1.52; MTL 0.66–1.13; PpH 0.11–0.19; PpL 0.39–0.59; SI 124–161; SL 0.74– 1.2 1.

Etymology

Greek: referring to the large eye.

References