Key to Carebara escherichi 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]]

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Carebara

1

 * Dorsum of head densely sculptured with shallow foveolated punctures whose diameters are greater than the spaces separating them . . . . . 2


 * Dorsum of head densely sculptured with very small, shallow foveolate punctures, broadly separated betwen them . . . . . 6

2
return to couplet #1
 * Body totally devoid of standing hairs, appresed pubescence very scarce; Brazil . . . . . Carebara nuda


 * Body with few to abundant standing hairs; appresed pubescence moderate to heavy . . . . . 3

3
return to couplet #2
 * Head with more than 10 standing hairs . . . . . 4


 * Head with less than 10 standing hairs: very few or none . . . . . 5

4
return to couplet #3
 * Promesonotum with about 15 standing hairs; legs without standing hairs; Brazil . . . . . Carebara brasiliana


 * Promesonotum with more than 20 standing hairs; mid and hind tibia each with about 2-8 standing hairs; Brazil . . . . . Carebara pilosa

5
return to couplet #3
 * First tergum of gaster with several standing hairs; mesosoma narrow dorsoventrally, promesonotum flat in dorsal view, propodeal lobes evenly curved; Colombia . . . . . Carebara paya


 * First tergum of gaster without standing hairs; mesosoma not as above; Perú . . . . . Carebara inca

6
return to couplet #1
 * Promesonotum devoid of standing hairs; Brazil . . . . . Carebara majeri


 * Promesonotum with at least 2-4 standing hairs . . . . . 7

7
return to couplet #6
 * In dorsal view, promesonotum throughout or partially with fine longitudinal striation . . . . . 9


 * In dorsal view, promesonotum with dense reticulation, never striated . . . . . 8

8
return to couplet #7
 * In lateral view the propodeum angulated; head dorsum with four standing hairs; legs with about four standing hairs each; Colombia and Ecuador . . . . . Carebara angulata


 * In lateral view the propodeum rounded; head dorsum with two standing hairs; legs without standing hairs; Colombia . . . . . Carebara audita

9
return to couplet #7
 * Promesonotum throughout with longitudinal striation . . . . . 10


 * Most of promesonotum with longitudinal striation (Colombia) . . . . . 11

10
return to couplet #9
 * Standing hairs: none in head dorsum, four in promesonotum, none in propodeum, two in first tergum gaster (Colombia, Trinidad, Perú, Brazil) . . . . . Carebara striata


 * Standing hairs: two in head dorsum, six in promesonotum, two in propodeum, two in first tergum gaster (Western Colombia) . . . . . Carebara reina

11
return to couplet #9
 * Mid and hind tibiae without standing hairs . . . . . Carebara semistriata


 * Mid and hind tibiae with standing hairs . . . . . Carebara kofana