Key to Carebara concinna species complex workers

This worker key is based on: [[Media:Fernandez 2004a.pdf|Fernández, F. 2004a. The American species of the myrmicine ant genus Carebara Westwood (Hymentoptera: Formicidae). Caldasia. 26(1):191-238. PDF]]

The worker of Carebara peruviana is unknown.

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Carebara

1

 * Head and promesonotum smooth and shining, devoid of any conspicuous sculpturation; soldier unknown; USA . . . . . Carebara longii


 * Head and promesonotum with sculpture feebly or strongly marked, always present; soldier with heavy longitudinal regulation over head; Neotropics . . . . . 2

2
return to couplet #1
 * Pronotal dorsum mainly reticulate, without longitudinal rugulae or very few; hind tibia with short appresed pubescence . . . . . Carebara brevipilosa


 * Pronotal dorsum mainly longitudinally rugose, sometimes smooth and shining with a few longitudinal rugulae; hind tibia with longer suberect to erect pilosity (longer hairs about 80% or more the length of maximum tibial diameter) . . . . . Carebara urichi