Dolichoderus omicron

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Dolichoderus omicron
Scientific classification
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Hymenoptera
Family: Formicidae
Subfamily: Dolichoderinae
Genus: Dolichoderus
Species group: scrobiculatus
Species: D. omicron
Binomial name
Dolichoderus omicron
Shattuck & Marsden, 2013

Dolichoderus omicron casent0249560 p 1 high.jpg

Dolichoderus omicron casent0249560 d 1 high.jpg

Specimen Labels

Dolichoderus omicron is found in semi-arid open forested areas such as mallee woodlands and broombrush thickets across most of southern Australia. It forages during the day in columns primarily on the ground and nests in soil under rocks.

Identification

Pale markings absent from lower margin of the eyes; pronotum and propodeum lacking spines; in dorsal view the pronotum with only weakly defined shoulders, with the area between the shoulders more strongly convex to flat; dorsum of propodeum weakly and evenly convex, the length shorter (at most approximately the same length) than the posterior face, with a narrow carina separating the dorsal and posterior faces; posterior face of propodeum weakly concave, separated from the dorsal face by a distinct carina; gaster yellowish red and lighter in colour than the mesosoma; with sparse pubescence on the first gastral tergite and hairs generally not overlapping or entirely absent; tibiae with erect or suberect hairs.

This species is most similar to Dolichoderus canopus but can be distinguished by having a gaster yellowish red and lighter in colour that the mesosoma whereas D. canopus has a gaster which is at least similar in colour if not darker than the mesosoma.

Identification Keys including this Taxon

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.

  • omicron. Dolichoderus omicron Shattuck & Marsden, 2013: 127, fig. 18 (w.) AUSTRALIA.

Type Material

Description

Available specimens uniform and similar to the figured individual except in showing moderate variation in body colour, which varies from light reddish-brown to brown, and leg colour, which ranges from yellow-red to reddish-brown.

Measurements (n=5). CI 82–87; EI 31–34; EL 0.24–0.28; HL 0.87–0.99; HW 0.72–0.86; ML 1.14–1.34; MTL 0.61–0.71; PronI 66.49–70.16; PronW 0.49–0.59; SI 112–119; SL 0.85–0.96.

References