Iridomyrmex cephaloinclinus Shattuck, 1315

Heterick, Brian E. & Shattuck, Steve, 2011, Revision of the ant genus Iridomyrmex (Hymenoptera: Formicidae) 2845, Zootaxa 2845 (1), pp. 1-174 : 59-60

publication ID

https://doi.org/ 10.11646/zootaxa.2845.1.1

publication LSID

lsid:zoobank.org:pub:1FDB8D69-7200-4603-9677-930D01E813B5

DOI

https://doi.org/10.5281/zenodo.5293970

persistent identifier

https://treatment.plazi.org/id/F72587FD-7044-FFA3-FF73-EFAA8800FC29

treatment provided by

Felipe

scientific name

Iridomyrmex cephaloinclinus Shattuck
status

 

Iridomyrmex cephaloinclinus Shattuck View in CoL

( Fig. 22 View FIGURE 22 )

Iridomyrmex cephaloinclinus Shattuck, 1993b: 1315 View in CoL , figs 32, 33, 37.

Types. Holotype worker from Pretty Pool (Caravan Park), Port Headland , 20°18'44"S 118°38'14"E, Western Australia ( ANIC, ANIC32-000055 View Materials , examined) GoogleMaps . Paratypes: same data as holotype ( ANIC, ANIC32-000056 View Materials , 72 workers, examined; BMNH, 3 workers; MCZC, 3 workers) GoogleMaps .

Worker Description. Head. Posterior margin of head weakly concave, or strongly 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 full-face view. Number of ocelli one (a minute ocellus), position of obsolete ocelli indicated by small pits only or pits lacking; in full-face view, eyes set at about midpoint of head capsule; in profile, eye set anteriad of head capsule; eye more-or-less circular, or semi-circular. Frontal carinae concave; 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 blunt but distinct protuberance; mandible elongate triangular with oblique basal margin; long, curved setae on venter of head capsule present. Mesosoma. Pronotum moderately and evenly curved over its length. Erect pronotal setae numerous (12 or more) and longest setae elongate, flexuous and/or curved. Mesonotum sinuous. Erect mesonotal setae numerous (12 or more) and elongate, flexuous and/or curved. Mesothoracic spiracles always prominent as small, vertical protuberances; propodeal dorsum 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. Petiole. Dorsum of node convex; node thick, orientated anteriad. Gaster. Nonmarginal 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 head (except lower genae) and gaster blackish-brown, coxae brown, legs (some workers) cloudy orange-brown, lower genae, mesosoma and legs (some workers) brick-red. Colour of erect setae yellowish-white.

Measurements. Worker (n = 7) — CI 92–98; EI 25–27; EL 0.26–0.33; EW 0.16–0.19; HL 1.11–1.35; HW 1.05–1.32; ML 0.42–0.64; PpH 0.15–0.23; PpL 0.66–0.83; SI 82–89; SL 0.91–1.13.

Comments. As with other members of the I. rufoinclinus species-complex, I. cephaloinclinus is distinguished by colour pattern. In this case, the entire head capsule is reddish-brown to black, but the mesosoma is uniformly yellowish-red to reddish. Collections have been made at widely separated sites in Western Australia and Queensland, but the species appears to be morphologically fairly uniform across its range (see Shattuck, 1993b ). Based on field observations by the first author, this large member of the I. rufoinclinus complex appears to be a solitary forager, unlike most dolichoderines.

ANIC

Australian National Insect Collection

Kingdom

Animalia

Phylum

Arthropoda

Class

Insecta

Order

Hymenoptera

Family

Formicidae

Genus

Iridomyrmex

Loc

Iridomyrmex cephaloinclinus Shattuck

Heterick, Brian E. & Shattuck, Steve 2011
2011
Loc

Iridomyrmex cephaloinclinus Shattuck, 1993b: 1315

Shattuck, S. O. 1993: 1315
1993
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