Tetramorium striolatum

Known from a variety of habitats, from collection records this appears to be a ground nesting species that does well in dryer open areas.

Identification
Bolton (1977) - This species is closely related to Tetramorium impressum but is separated by its longer and more strongly developed frontal carinae and by the shape of the petiole node in profile.

Heterick (2009) - Tetramorium striolatum includes reddish specimens with a finely striolate basal sector of the first gastral tergite, and relatively massive petiolar nodes. Some doubt is here expressed that these are conspecific with other specimens that are orange, with, at most, basally shagreenate gasters and with less massive petiolar nodes. Both forms are presently regarded as a single variable species.

Distribution based on Regional Taxon Lists
Australasian Region: Australia.

Nomenclature

 *  striolatum. Tetramorium (Xiphomyrmex) viehmeyeri var. striolatus Viehmeyer, 1914b: 39 (w.) AUSTRALIA. Combination in Xiphomyrmex: Viehmeyer, 1925a: 28; in Tetramorium: Bolton, 1977: 141. Raised to species: Viehmeyer, 1925a: 28.

Worker
Bolton (1977) - TL 3.2-3.7, HL 0.76-0.90, HW 0.70-0.82, CI 91-94, SL 0.54-0.64, SI 73-78, PW 0.54-0.68, AL 0.92-1.08 (10 measured).

Mandibles longitudinally striate, anterior clypeal margin without a notch or impression. Frontal carinae extending back almost to occiput as a narrow raised flange, forming the upper margins of the very feeble, shallow scrobe area. Propodeal spines long, stout and acute, the metapleural lobes narrow, triangular, long and acute. Node of petiole in profile relatively long (Fig. 71), the dorsal length greater than the height of the tergal portion of the node. In dorsal view the node is broader behind than in front and is slightly broader than long. Dorsum of head finely longitudinally rugulose, the spaces between the rugulae finely and densely reticulate-punctate. Dorsal alitrunk densely longitudinally rugulose with some cross-meshes, particularly on the pronotum, the spaces densely punctate. Petiole and postpetiole densely and quite coarsely sculptured with reticulate rugulation and dense puncturation; base of first gastral tergite feebly punctulate or shagreened. All dorsal surfaces of head and body with numerous erect or suberect stout hairs. Colour orange-brown.