Key to Rhytidoponera of the southwestern Australian Botanical Province

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This worker key is based on: Heterick, B. E. 2009a. A guide to the ants of South-western Australia. Records of the Western Australian Museum, Supplement 76: 1-206. Part 2 PDF

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1

  • Viewed from front, occiput with distinct raised corners (Figure 502) . . . . . 2
Figure 502.
  • Viewed from front occiput either rounded or square without raised corners (Figure 503) . . . . . 3
Figure 503.

2

return to couplet #1

  • Corners of occiput in form of sharp, curved processes (Figure 504a); node conical (Figure 504b) . . . . . Rhytidoponera taurus
Figure 504a.
Figure 504b.
Rhytidoponera taurus casent0281277 h 1 high.jpg
Rhytidoponera taurus casent0281277 p 1 high.jpg
  • Corners of occiput in form of dull tubercles (Figure 505a); node subcuboidal (Figure 505b) . . . . . Rhytidoponera mayri
Figure 505a.
Figure 505b.
Rhytidoponera mayri casent0217493 h 1 high.jpg
Rhytidoponera mayri casent0281301 p 1 high.jpg

3

return to couplet #1

4

return to couplet #3

  • Apex of node terminating as a sharp spur (usually) or dull point (rarely) directed posteriad (Figure 506) . . . . . Rhytidoponera tyloxys
Figure 506.
Rhytidoponera tyloxys antweb1008715 h 1 high.jpg
Rhytidoponera tyloxys antweb1008715 p 1 high.jpg
  • Apex of node rounded, lacking a process or point directed posteriad (Figure 507) . . . . . Rhytidoponera dubia group sp. JDM 904
Figure 507.

5

return to couplet #3

  • Eye very large, equal to ≈ 1/3 length of head capsule . . . . . 6
  • Eye smaller, equal to, at most, 1/4 length of head capsule . . . . . 7

6

return to couplet #5

  • Mandible finely striate (Figure 508); head and body foveate-punctate, shining, without uniform fine microreticulation between striae and pits . . . . . Rhytidoponera crassinodis
Figure 508.
Rhytidoponera crassinoda casent0281284 h 1 high.jpg
Rhytidoponera crassinoda casent0281284 p 1 high.jpg
  • Mandible with superficial microreticulation only (Figure 509); head and body weakly to moderately sculptured, matt, with uniform microreticulation between larger sculpture . . . . . Rhytidoponera sp. JDM 736
Figure 509.

7

return to couplet #5

  • Head and mesosoma with shallow, vestigial punctation only (Figure 510), gaster glistening, with very fine, almost imperceptible stria . . . . . 8
Figure 510.
  • Head and mesosoma usually punctate-striate or foveate-reticulate (e.g. Figure 511) or, if punctate only, gaster shagreenate with vestigial punctuation . . . . . 9
Figure 511.

8

return to couplet #7

Figure 512.
Rhytidoponera flavicornis antweb1008305 p 1 high.jpg
Rhytidoponera flavicornis antweb1008305 d 1 high.jpg
  • Fine striae on 2nd gastral tergite weakly arched around midline of tergite (Figure 513) . . . . . Rhytidoponera micans
Figure 513.

9

return to couplet #7

  • Head punctate (Figure 514) or reticulate-punctate (Figure 515); mesosoma punctate; gaster shagreenate with vestigial punctuation . . . . . 10
Figure 514.
Figure 515.
  • Head and mesosoma punctate-striate (Figure 516) or foveate-reticulate; gaster usually with fine to coarse circular striae . . . . . 11
Figure 516.

10

return to couplet #9

  • Frons punctate, with small, well-spaced pits (Figure 517a); ventral process of petiole a short spur . . . . . Rhytidoponera levior
Figure 517a.
  • Frons more reticulate-punctate, particularly towards centre of head capsule, edges of pits often confluent (Figure 518a); ventral process of petiole long, needle-like (Figure 518b) . . . . . Rhytidoponera rufonigra
Figure 518a.
Figure 518b.
Rhytidoponera rufonigra antweb1008320 p 1 high.jpg
Rhytidoponera rufonigra antweb1008320 d 1 high.jpg

11

return to couplet #9

  • In profile, vertex of head capsule flattened, its posterior angles distinctly lobate (Figure 519); node thick, cuboidal or subcuboidal . . . . . 12
Figure 519.
  • In profile, vertex of head capsule more rounded, its posterior angles with at most a small, weak flange (Figure 520); node often thinner . . . . . 17
Figure 520.

12

return to couplet #11

  • In profile, petiolar node low, at least as wide as high; subpetiolar process a long spine (R. anceps group) . . . . . 13
  • In profile, petiolar node distinctly higher than wide; subpetiolar process spurlike (R. metallica group) . . . . . 14

13

return to couplet #12

Figure 521.
Rhytidoponera anceps casent0281245 h 1 high.jpg
Rhytidoponera anceps casent0281245 p 1 high.jpg
  • First gastral tergite with thick, discontinuous striae (Figure 522) . . . . . Rhytidoponera sp. ANIC 44
Figure 522.

14

return to couplet #12

Rhytidoponera inornata casent0281265 h 1 high.jpg
Rhytidoponera inornata casent0281265 p 1 high.jpg
  • Body with strong blue- or green-purple iridescence . . . . . 15

15

return to couplet #14

  • First gastral tergite strongly areolate, the areolae confluent (Figure 523); second gastral tergite with many shallow, elongate pits in additional to the fine, circular striae . . . . . Rhytidoponera metallica group JDM 1098
Figure 523.
  • Sculpture of first and second gastral tergite usually confined to fine, circular striae, a few scattered, shallow pits may be present (Figure 524) . . . . . 16
Figure 524.

16

return to couplet #15

Rhytidoponera metallica casent0172345 head 1.jpg
Rhytidoponera metallica casent0172345 profile 1.jpg
  • Appendages orange . . . . . Rhytidoponera metallica group JDM 1097

17

return to couplet #11

  • Node thin, tapering, without vertical sulcus posteriad (Figure 525); gaster shiny; mostly with greenish-purple or coppery iridescence (lacking in a few northern populations) . . . . . Rhytidoponera violacea
Figure 525.
Rhytidoponera violacea casent0217496 h 1 high.jpg
Rhytidoponera violacea casent0217496 p 1 high.jpg
  • Node either thicker, not tapering, or with vertical sulcus posteriad (e.g. Figure 526); gaster usually duller; iridescence always absent . . . . . 18
Figure 526.

18

return to couplet #17

  • In profile, node acuminate, with vertical sulcus posteriad (Figure 526); short, erect setae virtually absent from body surfaces, very sparse on legs and antennae . . . . . Rhytidoponera punctigera
Figure 526.
Rhytidoponera punctigera casent0281825 h 1 high.jpg
Rhytidoponera punctigera casent0281305 p 1 high.jpg
  • In profile, node cuboidal or subcuboidal without vertical sulcus (small, longitudinal sulcus may be present on dorsum) (Figure 527); short erect setae well distributed on body surfaces, legs and antennae . . . . . 19
Figure 527.

19

return to couplet #18

  • Frons finely longitudinally striate in dorsal sector, with scattered, sparse punctuation (Figure 528) . . . . . Rhytidoponera micans group sp. JDM 576
Figure 528.
Figure 529.
Rhytidoponera foveolata casent0281824 h 1 high.jpg
Rhytidoponera foveolata casent0281824 p 1 high.jpg