Iridomyrmex reburrus Shattuck
Creators: name: Heterick, Brian E.
name: Shattuck, Steve
Publisher: name: Zenodo
Year: 2011
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hymenoptera
Formicidae
Iridomyrmex
Iridomyrmex reburrus

description: <i>Iridomyrmex reburrus</i> Shattuck (Fig. 65) <i>Iridomyrmex reburrus</i> Shattuck, 1993a: 132, figs 8, 14. <b>Types.</b> Holotype worker from Kapalga, Kakadu National Park, 12°33'S 132°19'E, Northern Territory (ANIC, ANIC32-008780, examined). Paratypes: same data as holotype (ANIC, ANIC32-008781, 28 workers, examined; BMNH, 2 workers; MCZC, 2 workers). <b>Worker Description. <i>Head.</i></b> Posterior margin of head planar to weakly concave; erect setae on posterior margin in full-face view set in a row; sides of head noticeably convex; erect genal setae present on sides of head in fullface view. Ocelli absent; in full-face view, eyes set above midpoint of head capsule; in profile, eye set anteriad of head capsule; eye semi-circular. Frontal carinae convex; antennal scape surpassing posterior margin of head by 1–2 x its diameter. Erect setae on scape present and abundant; prominence on anteromedial clypeal margin projecting as triangular spur; mandible elongate triangular with oblique basal margin; long, curved setae on venter of head capsule absent. <i>Mesosoma.</i> Pronotum moderately and evenly curved over its length. Erect pronotal setae numerous (12 or more), short and bristly. Mesonotum sinuous. Erect mesonotal setae numerous (12 or more), short and bristly. Mesothoracic spiracles always prominent as small, vertical protuberances; propodeal dorsum protuberant, or smoothly and evenly convex; placement of propodeal spiracle posteriad and near propodeal declivity, or mesad, more than its diameter away from propodeal declivity; propodeal angle present as a bluntly defined right angle, the dorsal and declivitous propodeal faces never separated by a carina, or 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. <i>Petiole.</i> Dorsum of node acuminate, or convex; node thin, scale-like, orientation moreor-less vertical. <i>Gaster.</i> Non-marginal erect setae of gaster present on first gastral tergite; marginal erect setae of gaster present on first tergite. <i>General characters.</i> Allometric differences between workers of same nest absent. Colour foreparts orange to reddish, gaster dark brown to black, legs brown, iridescence on body and legs (where present) pinkish, iridescence on gaster yellow-green to bluish. Colour of erect setae brown to dark brown. <b>Measurements.</b> <i>Worker</i> (n = 31) <i>—</i> CI 86–95; EI 17–21; EL 0.26–0.36; EW 0.16–0.23; HL 1.46–2.09; HW 1.26–1.99; ML 0.64–1.06; PpH 0.19–0.32; PpL 0.69–1.06; SI 89–108; SL 1.36–1.82. <b>Comments.</b> In contrast with <i>I</i>. <i>purpureus</i> and its relatives, <i>I</i>. <i>reburrus</i> belongs to a largely northern meat ant complex in which the posterior pronotum rises rather abruptly towards its junction with the mesonotum (the posterior pronotum has a much more gradual slope in the <i>I</i>. <i>purpureus</i> complex). While <i>I</i>. <i>reburrus</i> workers can generally be distinguished by the erect setae on the sides of the head, this condition can also occur in the closely related <i>I</i>. <i>sanguineus</i>, so it is desirable, if possible, to examine a series of ants (in the case of <i>I</i>. <i>sanguineus</i>, individuals without erect setae on the sides of the head are much more frequent than those possessing them, whereas all <i>I</i>. <i>reburrus</i> workers possess at least 2–4 erect setae and commonly 15–40 such setae: see Shattuck (1993a) for a fuller discussion of this feature). Living or freshly collected workers of <i>I</i>. <i>reburrus</i> also tend to be somewhat darker than <i>I</i>. <i>sanguineus</i> workers (Shattuck, 1993a). <i>Iridomyrmex reburrus</i> shows a preference for riparian habitats (Andersen, 2000), and was recently found by the two authors of this paper to be particularly common near the Darwin (Northern Territory) International Airport, along the banks of Rapid Creek. Interestingly, isolated collections of <i>I</i>. <i>reburrus</i> have also been made in remote mallee country in south-eastern Western Australia (Emu Rock and Gora Hill), these colonies being well separated from other known populations (see Heterick, 2009).
description: Published as part of <i>Heterick, Brian E. &amp; Shattuck, Steve, 2011, Revision of the ant genus Iridomyrmex (Hymenoptera: Formicidae) 2845, pp. 1-174 in Zootaxa 2845 (1)</i> on pages 127-128, DOI: 10.11646/zootaxa.2845.1.1, http://zenodo.org/record/5287811
description: {"references": ["Shattuck, S. O. (1993 a) Revision of the Iridomyrmex purpureus species-group (Hymenoptera: Formicidae). Invertebrate Taxonomy, 7, 113 - 149.", "Andersen, A. N. (2000). The Ants of Northern Australia: a guide to the monsoonal fauna. CSIRO Publishing, Collingwood, Victoria. v + 106 pp.", "Heterick, B. E. (2009) A Guide to the Ants of South-western Australia. Records of the Western Australian Museum Supplement No. 76, 205 pp."]}