Iridomyrmex neocaledonica

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

Iridomyrmex neocaledonica side view

Iridomyrmex neocaledonica top view

The handful of specimens available for this species have been collected at a considerable elevation on New Calendonia (to 1200 m).

Identification

Apart from its biogeography, this handsome medium-sized, brown Iridomyrmex is distinguished from very similar species like Iridomyrmex splendens, Iridomyrmex meridianus and Iridomyrmex mjobergi (southern, mesic populations) by a combination of its longer antennal scape (extending beyond the posterior margin of the head by 3 × its greatest width) and lack of a row of setae on the posterior margin of the head.

Keys including this Species

Distribution

Distribution based on Regional Taxon Lists

Australasian Region: New Caledonia (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.

  • neocaledonica. Iridomyrmex neocaledonica Heterick & Shattuck, 2011: 111, figs. 55, 96 (w.) NEW CALEDONIA.

Type Material

Description

Worker Description.' Head. Posterior margin of head planar to weakly concave; erect setae on posterior margin in full-face view, present singly or as a couple of setae on either side of posterior margin of head; sides of head noticeably convex; erect genal setae absent from sides of head in full-face view (one to a few small setae may be present near mandibular insertion). 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 that of its outer margin. Frontal carinae convex; antennal scape surpassing posterior margin of head by approximately 3 x its diameter. Erect setae on scape 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 sparse (6 or fewer) and bristly. Mesonotum sinuous, or evenly curved. Erect mesonotal setae sparse (6 or fewer) and bristly. Mesothoracic spiracles always inconspicuous; propodeal dorsum smoothly and evenly convex; placement of propodeal spiracle posteriad and near 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 lacking or very minute (one or two tiny setae present). Petiole. Dorsum of node convex; node thin, scale-like, orientation more-or-less vertical. Gaster. Non-marginal erect setae of gaster present or absent on first gastral tergite; marginal erect setae of gaster absent on first tergite. General characters. Allometric differences between workers of same nest absent. Colour uniformly pale to dark brown. Colour of erect setae depigmented, pale.

Measurements. Worker (n = 3)—CI 85–86; EI 26–27; EL 0.21–0.22; EW 0.16–0.17; HFL 1.16–1.25; HL 0.95–0.98; HW 0.82–0.84; ML 1.23–1.27; MTL 0.82–0.86; PpH 0.16–0.17; PpL 0.51–0.52; SI 115–116; SL 0.94– 0.96.

Etymology

Latin: with reference to the distribution of the species (New Caledonia).

References