Ectomomyrmex astutus

Distribution based on Regional Taxon Lists
Australasian Region: Australia. Indo-Australian Region: Borneo, Indonesia, Malaysia, New Guinea. Oriental Region: India, Thailand, Vietnam. Palaearctic Region: China, Democratic Peoples Republic of Korea, Republic of Korea.

Nomenclature

 *  astutus. Pachycondyla astuta Smith, F. 1858b: 107 (w.) AUSTRALIA. Karavaiev, 1925b: 120 (q.); Imai, Kubota, et al. 1985: 46 (k.). Combination in P. (Bothroponera): Emery, 1901a: 45; in P. (Ectomomyrmex): Forel, 1905c: 6; in Ectomomyrmex: Bingham, 1903: 86; Wheeler, W.M. 1927h: 84; in Bothroponera: Taylor & Brown, D.R. 1985: 21; in Pachycondyla: Brown, in Bolton, 1995b: 303; in Bothroponera: Joma & Mackay, 2013: 2; in Ectomomyrmex: Schmidt & Shattuck, 2014: 193. Current subspecies: nominal plus obscura.

Type Material


Three worker syntypes in. Labelled “n. Holl.” (New Holland = Australia.)

Description
Worker

Smith (1858): Black; the mandibles, flagellum, tibiæ and tarsi ferruginous; the head oblong and delicately striated longitudinally. Thorax elongate, rounded anteriorly and obliquely truncate posteriorly; the prothorax striated, the stria somewhat obliquely curved; the meso- and metathorax slightly rugose. The node of the abdomen compressed, thick and bent forwards, the upper margin rounded, the anterior and posterior surfaces transversely striated. Abdomen oblong, slightly pilose and shining; the posterior margins of the segments rufo-piceous, the apex ferruginous.

Bingham (1930): Black, the mandibles and the tibiae and tarsi of the legs deep castaneous red; the head, thorax and abdomen covered with short erect reddish-yellow hairs and a line thin sericeous recumbent pubescence, visible only in certain lights. Head very finely and closely striate, the striae diverging posteriorly from a medial line; the emarginate portion of the occiput smooth and shining, with a few oblique striae in the middle; the lateral angles of the head acute. Thorax: the pronotum convex above, narrowed anteriorly into a neck, closely finely striate, the striae concentric; meso- and metanotmn somewhat more coarsely longitudinally striate, the basal portion of the metanotum short, not longer than the apical sloping portion, the latter seen from the back subcordate in shape, widening in the middle, finely longitudinally striate; legs moderately long, robust. Node of the pedicel rugose above, transverse, striate in front; abdomen very finely and closely punctured, opaque, and bearing scattered piligerous points, the apical margins of the 2nd and succeeding segment very narrow and obscurely reddish.

Length: 12.5 - 13 mm

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