Key to Notoncus of the southwestern Australian Botanical Province

This worker key is based on: [[Media:Heterick 2009.pdf|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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 * Australia
 * SWBP
 * Notoncus

1

 * Posterior pronotum not raised, unarmed; mesonotum without posterior lobe (Figure 374) . . . . . Notoncus hickmani


 * Posterior pronotum raised, with pair of laterally directed denticles; mesonotum with posterior lobe (Figure 375) . . . . . 2

2
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 * Depigmented yellow species, frons of head capsule darker; dorsum of propodeum narrow with pair of small denticles at propodeal angles . . . . . Notoncus sp. JDM 487


 * Brown or reddish-brown species; dorsum of propodeum broad, propodeal angles present or absent, but denticles usually absent . . . . . 3

3
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 * Mesosoma smooth and shining; gaster lacking pubescence . . . . . Notoncus gilberti


 * Mesosoma sculptured, dull; gaster may be wholly pubescent . . . . . 4

4
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 * First gastral tergite strongly pubescent amid erect setae, striolae on mesosoma tending to weak and superficial; upper vertex of head smooth and shining (Figure 376) . . . . . Notoncus cf. capitatus


 * First gastral tergite with well scattered appressed setulae only amid erect setae; mesosoma strongly striate; upper vertex of head striolate (Figure 377) . . . . . Notoncus enormis