Dolichoderus rutilus , 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: 133-134

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Dolichoderus rutilus

sp. n.

Dolichoderus rutilus  sp. n.

( Fig. 22View FIGURE 22)

Types. Holotype worker from Innes National Park, Yorke Peninsula, approx. 35 ° 13 'S 136 ° 52 'E, South Australia, 26 January 1976, P.J.M. Greenslade (ANIC, ANIC 32 - 061185); 1 paratype worker, same data as holotype except 28 January 1976 (ANIC, ANIC 32 - 061184); 1 paratype worker from Spalding Cove, Port Lincoln, approx. 34 ° 47 'S 135 ° 58 'E, South Australia, 2 February 1973, P.J.M. Greenslade (ANIC, ANIC 32 - 061186).

Diagnosis. Head yellowish-red; sculpturing on head minimal, either essentially absent or consisting of very fine reticulations; pronotum and propodeum lacking spines; posterior face of propodeum weakly concave, separated from the dorsal face by at most a weakly defined angle; dorsum of pronotum smooth, the surfaces shiny. Dorsum of propodeum evenly convex, the angle at approximately the same level as the metanotal groove.

This species differs from D. kathae  in that the surfaces of the head and dorsum of the pronotum of D. rutilus  are smooth and shiny; whereas the surfaces of the head and dorsum of the pronotum of D. kathae  are finely reticulate and matte.

This species is morphologically similar to D. kathae  and D. parvus  ; for a discussion of differences see Comments under D. kathae  .

Worker description. See Fig. 22View FIGURE 22. All specimens closely match the one figured.

Measurements (n= 3). CI 86–88; EI 33–34; EL 0.25–0.28; HL 0.87–0.97; HW 0.75–0.85; ML 1.18–1.29; MTL 0.64–0.70; PronI 61.50–62.76; PronW 0.46–0.53; SI 108–113; SL 0.85–0.93.

Comments. This rare species is known from only three specimens collected from two locations, one near Port Lincoln and the other at the tip of Yorke Peninsula, South Australia. Nothing is known of its biology.