Key to Patagonomyrmex

This key to workers, queens and males is based on: Johnson, R.A., Moreau, C.S. 2016. A new ant genus from southern Argentina and southern Chile, Patagonomyrmex (Hymenoptera: Formicidae). Zootaxa 4139: 1–31 (DOI:10.11646/zootaxa.4139.1.1).

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Patagonomyrmex

Workers

W1

• Dorsum of promesonotum with subparallel rugae to rugoreticulate, interrugae strongly granulate-punctate, dull; rugae on cephalic dorsum continue to posterior margin of head . . . . . . Patagonomyrmex angustus

• Dorsum of promesonotum smooth and shining, lacking rugae; rugae on cephalic dorsum rarely continue to posterior margin of head . . . . . W2

W2

return to couplet #1

• Body mostly concolorous blackish to black . . . . . Patagonomyrmex laevigatus

• Head and mesosoma light orangish-red, gaster slightly darker to brownish . . . . . Patagonomyrmex odoratus

Queens

Q1

• Mesoscutum and mesoscutellum with weak to moderately coarse longitudinal rugae, interrugae weakly to strongly granulate-punctate; inferior propodeal spines elongate, length similar to that of superior propodeal spines . . . . . Patagonomyrmex angustus

• Mesoscutum and mesoscutellum smooth and shiny; inferior propodeal spines triangular, much shorter than superior propodeal spines . . . . . Q2

Q2

return to couplet #1

• Body concolorous black . . . . . Patagonomyrmex laevigatus

• Body orangish to orangish-brown . . . . . Patagonomyrmex odoratus

Males

M1

• Mesopleura, metapleura, pronotal sides, and dorsum of propodeum strongly granulate, dull, with a beaded appearance; at least several hairs on ventral surface of head and those protruding from mandibles approach to exceed MOD; scapes usually long, reaching to near posterior margin of eye . . . . . Patagonomyrmex angustus

• Mesopleura, metapleura, pronotal sides, and/or dorsum of propodeum with weak to strong rugae; no hairs on ventral surface of head or those protruding from mandibles approach MOD; scapes short, reaching only slightly beyond anterior margin of eye . . . . . 2

M2

return to couplet #1

• In profile, juncture between cephalic dorsum and posterior declivity (near posterior margin of ocelli) weakly angulate to rounded; posterior declivity weakly convex to weakly concave . . . . . Patagonomyrmex laevigatus

• In profile, juncture between cephalic dorsum and posterior declivity strongly angulate; posterior declivity strongly concave . . . . . Patagonomyrmex odoratus