Key to Australian Polyrhachis (Myrmatopa) species

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The following key to Australian Polyrhachis (Myrmatopa) species (based on the worker caste) is modified from Kohout (2012[1]).

1

  • Lateral margins of mesonotum produced into distinct dorsolateral prominences (extralimital) => (P. schang-group)
  • Lateral margins of mesonotum rather flat, without distinct dorsolateral prominences => 2

2

  • Pronotal humeri produced into distinctly upturned, acute teeth; head and body black with gaster and appendages medium to dark reddish-brown (P. flavicornis group) => 3
  • Pronotal humeri obtusely angulate; body and appendages more-or-less uniformly medium reddish-brown, with head usually a shade darker (P. wallacei group) => Polyrhachis yarrabahensis

3

  • Larger (HL >2.00); antennal scapes relatively short (SI<140); propodeal spines rather long, strongly upturned => Polyrhachis menozzii
  • Smaller (HL <1.70); antennal scapes relatively long (SI >160); propodeal spines reduced to short acute teeth => Polyrhachis alphea

References

  1. Kohout, R.J. 2012. A review of the Australian Polyrhachis ants of the subgenera Myrma Billberg, Myrmatopa Forel, Myrmothrinax Forel and Polyrhachis Fr. Smith (Hymenoptera: Formicidae: Formicinae). Memoirs of the Queensland Museum – Nature 56(1): 25-59.