Dolichoderus

Shattuck, Steven O. & Marsden, Sharon, 2013, Australian species of the ant genus Dolichoderus (Hymenoptera: Formicidae), Zootaxa 3716 (2), pp. 101-143: 105-106

publication ID

http://dx.doi.org/10.11646/zootaxa.3716.2.1

publication LSID

lsid:zoobank.org:pub:E76C890A-DC27-4B8A-90CD-41D10682E8FA

persistent identifier

http://treatment.plazi.org/id/039C0778-2833-FF85-FF74-F756E4DD8F36

treatment provided by

Plazi

scientific name

Dolichoderus
status

 

Key to Australian Dolichoderus  species based on workers

1. Propodeum with elongate spines (Fig. 2).................................................................. 2

-. Propodeum lacking spines ( Fig. 1View FIGURE 1)....................................................................... 13

2. Pronotum with elongate spines ( Fig. 5View FIGURE 5) ( doriae  group)........................................................ 3

-. Pronotum rounded, lacking spines (Fig. 2) ( scabridus  group).................................................. 8

3. Pronotal spines directed laterally and dorsally ( Fig. 10View FIGURE 10).............................................. extensispinus 

-. Pronotal spines directed anteriorly and approximately parallel to the longitudinal axis of the body ( Fig. 7View FIGURE 7)............... 4

4. Pronotal spines long, in dorsal view a line drawn between their tips lies anterior of the pronotal collar ( Fig. 7View FIGURE 7)...... dentatus 

-. Pronotal spines short, in dorsal view a line drawn between their tips intersects the pronotal collar ( Fig. 8View FIGURE 8)............... 5

5. First gastral tergite with abundant short erect hairs.......................................................... 6

-. First gastral tergite generally lacking erect hairs, but occasionally with a few very short, scattered hairs present........... 7

6. Legs yellow, strongly contrasting with black body; propodeal spines and sometimes antennae dark red to red-brown, lighter in colour than nearby body regions ( Fig. 8View FIGURE 8).............................................................. doriae 

-. Legs dark brown to black, generally similar in colour to the body or at most slightly lighter in colour than body; tips of propo- deal spines and antennae very dark brown to black and similar in colour to nearby body regions ( Fig. 5View FIGURE 5)............ clarki 

7. First gastral tergite with abundant appressed very fine pubescence ( Fig. 9View FIGURE 9)..................................... etus 

-. First gastral tergite with a few scattered, very small appressed hairs ( Fig. 12View FIGURE 12)................................. gordoni 

8. In front view, propodeal spines directed upward at angle of greater than 60 ° to horizontal plane (may be almost vertical), the angle between them approximately 45 ° (Fig. 2).................................................. angusticornis 

-. In front viewed, propodeal spines directed upward at angle of 45 ° or less to horizontal plane, the angle between them at least 90 ° ( Fig. 21View FIGURE 21)........................................................................................ 9

9. Dorsum of petiolar node angular; when viewed from the front base of propodeal spines narrow, the spines forming a “V” with a narrowly rounded angle between their bases; legs long ( Fig. 21View FIGURE 21) (Western Australia).............................. 10

-. Dorsum of petiolar node broad, weakly convex to weakly concave; when viewed from the front, base of propodeal spines broad, the spines forming a “U” with a broad concavity connecting their bases (sometimes this region flat or weakly convex); legs short ( Fig. 14View FIGURE 14) (South Australia and eastward)......................................................... 12

10. Legs entirely light red or orange ( Fig. 27View FIGURE 27)............................................................. ypsilon 

-. Femora dark reddish-brown or black, tibiae varying from dark brown to light red.................................. 11

11. Legs bicoloured, dark femora contrasting with more lightly coloured tibiae ( Fig. 21View FIGURE 21)....................... rufotibialis 

-. Legs uniformly coloured dark red-brown to reddish-black ( Fig. 16View FIGURE 16).......................................... niger 

12. Legs dark red-brown, at most only slightly lighter in colour than the body ( Fig. 14View FIGURE 14)............................ inferus 

-. Legs yellowish-red, distinctly lighter than the colour of the body ( Fig. 23View FIGURE 23).................................. scabridus 

13. Posterior face of propodeum weakly concave, separated from the dorsal face by at most a weakly defined angle; sculpturing on head minimal, either essentially absent or consisting of very fine reticulations ( Fig. 3View FIGURE 3) ( australis  group)............... 14

-. Posterior face of propodeum strongly concave, separated from the dorsal face by a distinct carina; sculpturing on head consist- ing of large, shallow to moderately deep fovea ( Fig. 24View FIGURE 24) ( scrobiculatus  group).................................... 18

14. Head yellowish-red ( Fig. 22View FIGURE 22).......................................................................... 15

-. Head dark reddish-brown to black ( Fig. 3View FIGURE 3)................................................................ 17

15. Dorsum of propodeum falling away posteriorly so that the angle is below the level of the metanotal groove ( Fig. 19View FIGURE 19).. parvus 

-. Dorsum of propodeum evenly convex, the angle at approximately the same level as the metanotal groove ( Fig. 15View FIGURE 15)...... 16

16. Head and dorsum of pronotum finely reticulate, the surfaces matte ( Fig. 15View FIGURE 15).................................. kathae 

-. Head and dorsum of pronotum smooth, the surfaces shiny ( Fig. 22View FIGURE 22)........................................ rutilus 

17. First tergite of gaster with elongate erect hairs but lacking appressed pubescence ( Fig. 3View FIGURE 3)...................... australis 

-. First tergite of gaster with both elongate erect hairs and fine, silvery appressed pubescence ( Fig. 13View FIGURE 13)............. goudiei 

18. Pubescence on first gastral tergite abundant, the individual hairs overlapping ( Fig. 26View FIGURE 26)............................ 19

-. Pubescence on first gastral tergite sparse, the individual hairs generally not overlapping, or hairs absent ( Fig. 20View FIGURE 20)........ 21

19. Dorsum of pronotum essentially smooth, the sculpturing at most very fine, the surface shiny; metanotal groove relatively deep ( Fig. 6View FIGURE 6) (SA, southern WA).......................................................................... clusor 

-. Dorsum of pronotum heavily sculptured, the surface dull; metanotal groove relatively weekly developed ( Fig. 24View FIGURE 24) (north-east- ern NSW, Qld)...................................................................................... 20

20. Gaster similar in colour to body (both dark brown to black) ( Fig. 24View FIGURE 24).................................. scrobiculatus 

-. Gaster much lighter in colour compared to body (body dark brown to black, gaster dull yellow) ( Fig. 26View FIGURE 26).......... turneri 

21. Tibiae lacking erect hairs ( Fig. 25View FIGURE 25)................................................................. semiorbis 

-. Tibiae with erect or suberect hairs ( Fig. 1View FIGURE 1)................................................................. 22

22. Dorsum of propodeum elongate (longer than posterior face) and weakly convex, the carina separating dorsal and posterior faces produced as sharp shelf; pale markings present near lower margin of eye ( Fig. 1View FIGURE 1).................... albamaculus 

-. Dorsum of propodeum shorter (at most approximately the same length as the posterior face) and strongly convex, the carina separating dorsal and posterior faces a narrow carina; without pale markings near lower margin of eyes ( Fig. 20View FIGURE 20)........ 23

23. Dorsum of propodeum highly arched and often with flat or even weakly concave sections; posterior face of propodeum deeply concave and often nearly semicircular; in dorsal view the pronotum with strongly developed shoulders, the area between the shoulders weakly convex to weakly concave ( Fig. 20View FIGURE 20)................................................... reflexus 

- Dorsum of propodeum more weakly and evenly convex, occasionally with a flat or nearly flat section posteriorly; posterior face of propodeum less deeply concave and much less semi-circular; in dorsal view the pronotum with only weakly defined shoulders, the area between the shoulders more strongly convex to flat ( Fig. 18View FIGURE 18).................................. 24

24. Gaster yellowish red and lighter in colour than mesosoma ( Fig. 18View FIGURE 18)........................................ omicron 

-. Gaster dark brown to black, darker than mesosoma when mesosoma is lightly coloured (similar to mesosoma in colour when entire body dark brown to black)....................................................................... 25

25. Head and pronotum weakly and superficially areolate, the overall sculpturing pattern indistinct ( Fig. 4View FIGURE 4)........... canopus 

-. Dorsum of head and pronotum with large but shallow and closely spaced foveae, the lateral pronotum distinctly striate, the overall sculpturing pattern very distinct ( Fig. 17View FIGURE 17)........................................................... 26

26. Head reddish to reddish-brown and lighter in colour than dark brown to black gaster; mesosoma and gaster with both erect hairs and scattered, appressed pubescence ( Fig. 17View FIGURE 17)................................................. nigricornis 

-. Head dark brown to black and similar in colour to gaster; mesosoma and gaster with erect hairs but little or no appressed pubescence ( Fig. 11View FIGURE 11)............................................................................ formosus