Discothyrea crassicornis

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Discothyrea crassicornis
Scientific classification
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Hymenoptera
Family: Formicidae
Subfamily: Proceratiinae
Tribe: Proceratiini
Genus: Discothyrea
Species: D. crassicornis
Binomial name
Discothyrea crassicornis
Clark, 1926

Discothyrea crassicornis antweb1008163 d 1 high.jpg

Specimen Labels

Known from two hand collected workers taken from under a log in the Darling Range, and a pitfall-trapped worker from Dwellingup.

Identification

Keys including this Species

Distribution

Distribution based on Regional Taxon Lists

Australasian Region: Australia (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.

  • crassicornis. Discothyrea crassicornis Clark, 1926: 46, pl. 6, fig. 4 (w.) AUSTRALIA. See also: Brown, 1958g: 340.

Unless otherwise noted the text for the remainder of this section is reported from the publication that includes the original description.

Description

Worker

Worker: Length 1.8mm.

Rufo testaceous; mandibles, apical joints of the antennae and legs yellow. Hairs whitish, short and sparse on the whole body. Pubescence whitish, short, very fine and abundant everywhere, longest on the gaster.

Opaque. Densely and finely punctate-reticulate on the head, more coarsely so on the thorax and abdomen, node coarsely punctate above.

Head longer than broad, broader behind than in front, the occipital border and sides convex, the posterior angles rounded. Frontal carinae short and erect, dilated behind, truncate behind the dilation and confluent to the middle of the head. Clypeus produced, widely convex in front, feebly but distinctly crenulate. Mandibles moderately long, subtriangular, the terminal border with a sharp cutting edge which shows no traces of teeth, ending in a somewhat long sharp point. Eyes small, flattened, placed slightly in front of the middle of the sides. No traces of ocelli. Antennae 9-jointed, short and very thick; scapes short, extending to about the occipital third of the head, club-shaped, fully three times thicker at the apex than at the base; first joint of the funiculus as broad as long, cylindrical, five times longer than the second, the second to seventh much broader than long, subequal, the seventh fully three times broader than the second, the apical joint very large, about two and one half times longer than broad, and much longer than the remainder of the funiculus. Thorax fully twice as long as broad at the pronotum; one and one half times broader through the pronotum than through the epinotum; pronotum convex in front and on the sides, feebly concave in the mesonotal region; there are no traces of mesonotal sutures; the posterior margin of the epinotum slightly concave and marginate, the angles bluntly produced; in profile rounded and convex above, the epinotal declivity abrupt, almost at a right angle with the dorsum, the sides marginate. Node, from above, two and one half times broader than long, all four sides of the dorsum convex; in profile it is twice as high as long, rounded above, the anterior face almost straight, the ventral surface in front with a short blunt tooth-like projection, to the front edge of which is attached a keel-like, translucent lamella. Postpetiole slightly broader than long, much broader behind than in front, the anterior border and sides rounded; in profile it is convex and rounded above, the ventral surface with a transverse, tooth-like process in front. A strong constriction between the two segments of the gaster. The second segment is one fourth broader than long, broader in front than behind, strongly rounded and convex, narrowing rapidly to the small apical segments which are placed below. Legs short and stout.

Type Material

References