Key to Rogeria of Guyana

This worker key is based on: LaPolla, J. S. and J. Sosa-Calvo. 2006. Review of the ant genus Rogeria (Hymenoptera: Formicidae) in Guyana. Zootaxa. 1330:59-68.

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• Rogeria
• Guyana

1

• Hairs on mesosomal dorsum entirely appressed, or consisting of a mixture of mostly appressed and a few decumbent hairs . . . . . 2

• Mesosomal dorsum bearing some erect hairs; appressed to suberect hairs may also be present . . . . . 4

2

return to couplet #1

• Body of clypeus not greatly projecting over clypeal apron; color brown to shiny dark brown . . . . . 3

• In lateral view, body of clypeus greatly projecting over clypeal apron; color dull brown . . . . . Rogeria prominula

3

return to couplet #2

• Smaller species (TL: 1.9 mm–2.9 mm); light brown to brown and dull . . . . . Rogeria foreli

• Larger species (TL: 3.75 mm–3.88 mm); dark brown and shiny . . . . . Rogeria tsumani

4

return to couplet #1

• In lateral view, petiolar node low and curving gradually into anterior peduncle . . . . . 5

• In lateral view, petiolar node tall and more sharply differentiated from anterior peduncle, node rounded, subquadrate, or squamiform . . . . . 6

5

return to couplet #4

• Dorsum of head rugoreticulate; area behind eyes rugoreticulate; reddish-brown . . . . . Rogeria blanda

• Dorsum of head with distinct longitudinal carinulae; area behind eyes smooth and shiny; dark brown . . . . . Rogeria procera

6

return to couplet #4

• Head surface uniformly rugoreticulate and/or areolate, no intervening shiny areas; hairs appressed to erect on head . . . . . 7

• Head surface relatively smooth, only vaguely rugoreticulate or areolate, with intervening shiny areas; hairs appressed on head . . . . . Rogeria curvipubens

7

return to couplet #6

• Posterior portion of head rugoreticulate . . . . . 8

• Posterior portion of head distinctly areolate . . . . . Rogeria innotabilis

8

return to couplet #7

• Dorsal surfaces of head, mesosoma, and metasoma with sparse appressed and/or erect hairs . . . . . 9

• Dorsal surfaces of head, mesosoma, and metasoma with a dense covering of erect hairs . . . . . Rogeria lirata

9

return to couplet #8

• Lateral surface of mesosoma with distinct rugae; reddish-yellow . . . . . 10

• Lateral surface of mesosoma without rugae, surface areolate; dull yellow . . . . . Rogeria micromma

10

return to couplet #9

• Head largely with decumbent to appressed hairs; propodeal spines at roughly right angles relative to longitudinal axis of the mesosoma . . . . . Rogeria alzatei

• Head largely with short erect hairs; propodeal spines nearly parallel to longitudinal axis of the mesosoma . . . . . Rogeria scobinata