Dolichoderus semiorbis , Shattuck, Steven O. & Marsden, Sharon, 2013

Shattuck, Steven O. & Marsden, Sharon, 2013, Australian species of the ant genus Dolichoderus (Hymenoptera: Formicidae), Zootaxa 3716 (2), pp. 101-143: 138-139

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Dolichoderus semiorbis

sp. n.

Dolichoderus semiorbis  sp. n.

( Fig. 25View FIGURE 25)

Types. Holotype worker from Eneabba South Nature Reserve, 29 ° 56.33 'S 115 ° 16.27 'E, April 2004, R. Dunn, pitfall trap, 1.5m shrubland, deep sand on sand dune (ANIC, ANIC 32 -059627).

Diagnosis. 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 D. 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 D. omicron  , D. canopus  , D. nigricornis  and D. formosus  by the lack of erect hairs on its tibiae, and can be distinguished from D. clusor  , D.

scrobiculatus  , and D. turneri  (which have abundant pubescence on the first gastral tergite) by the sparse or absent pubescence on the first gastral tergite.

Worker description. See Fig. 25View FIGURE 25. All known specimens show little difference from the one figured.

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.

Material examined. Western Australia: Eneabba (Sartori,M. & Stone,R.) (JDMC); Eneabba Region (Gove,A. & McCoy,N.) (JDMC).

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