Dolichoderus semiorbis

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

Dolichoderus semiorbis is known from a few specimens collected in low shrubland on a sand dune along the Western Australian coast.

Identification

Sculpturing on head consisting of large, shallow to moderately deep fovea; pronotum and propodeum lacking spines; posterior face of propodeum strongly concave, separated from the dorsal face by a distinct carina; pubescence on first gastral tergite sparse, if present hairs not overlapping; tibiae lacking erect hairs.

This species most closely resembles Dolichoderus albamaculus however it lacks erect hairs on its tibiae, and although possesses a distinct carina on the posterior face of the propodeum, it does not form a lip that projects vertically above the dorsum as it does in D. albamaculus. This species can be distinguished from Dolichoderus omicron, Dolichoderus canopus, Dolichoderus nigricornis and Dolichoderus formosus by the lack of erect hairs on its tibiae, and can be distinguished from Dolichoderus clusor, Dolichoderus scrobiculatus, and Dolichoderus turneri (which have abundant pubescence on the first gastral tergite) by the sparse or absent pubescence on the first gastral tergite.

Identification Keys including this Taxon

• Key to Australian Dolichoderus Species

Distribution

Latitudinal Distribution Pattern

Latitudinal Range: -29.9425° to -29.9425°.

North Temperate	North Subtropical	Tropical	South Subtropical	South Temperate

• Source: AntMaps

Distribution based on Regional Taxon Lists

Australasian Region: Australia (type locality).

Distribution based on AntMaps

Distribution based on AntWeb specimens

Check data from AntWeb

Countries Occupied

Number of countries occupied by this species based on AntWiki Regional Taxon Lists. In general, fewer countries occupied indicates a narrower range, while more countries indicates a more widespread species.

Estimated Abundance

Relative abundance based on number of AntMaps records per species (this species within the purple bar). Fewer records (to the left) indicates a less abundant/encountered species while more records (to the right) indicates more abundant/encountered species.

Nomenclature

The following information is derived from Barry Bolton's Online Catalogue of the Ants of the World.

• semiorbis. Dolichoderus semiorbis Shattuck & Marsden, 2013: 138, fig. 25 (w.) AUSTRALIA.

Type Material

• Holotype, worker, Eneabba South Nature Reserve, Western Australia, Australia, 29°56.33′0″S 115°16.27′0″E, April 2004, R. Dunn, ANIC32-059627, Australian National Insect Collection; pitfall trap, 1.5m shrubland, deep sand on sand dune.

Description

All known specimens show little variation.

Measurements (n=1). CI 78; EI 41; EL 0.28; HL 0.86; HW 0.67; ML 1.14; MTL 0.59; PronI 71; PronW 0.47; SI 105; SL 0.70.

References

• Heterick, B.E. 2021. A guide to the ants of Western Australia. Part I: Systematics. Records of the Western Australian Museum, Supplement 86, 1-245 (doi:10.18195/issn.0313-122x.86.2021.001-245).
• Heterick, B.E. 2022. A guide to the ants of Western Australia. Part II: Distribution and biology. Records of the Western Australian Museum, supplement 86: 247-510 (doi:10.18195/issn.0313-122x.86.2022.247-510).
• Shattuck, S.O. & Marsden, S. 2013. Australian species of the ant genus Dolichoderus (Hymenoptera: Formicidae). Zootaxa 3716, 101–143 (doi 10.11646/zootaxa.3716.2.1) PDF