Key to Rogeria of Guyana

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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. PDF

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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
Rogeria prominula fig 9.jpg
Rogeria prominula fig 20.jpg

3

return to couplet #2

  • Smaller species (TL: 1.9 mm–2.9 mm); light brown to brown and dull . . . . . Rogeria foreli
Rogeria foreli casent0006150 head 1.jpg
Rogeria foreli casent0006150 profile 1.jpg
  • Larger species (TL: 3.75 mm–3.88 mm); dark brown and shiny . . . . . Rogeria tsumani
Rogeria tsumani fig 11.jpg
Rogeria tsumani fig 22.jpg

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
Rogeria blanda H casent0900952.jpg
Rogeria blanda P casent0900952.jpg
  • Dorsum of head with distinct longitudinal carinulae; area behind eyes smooth and shiny; dark brown . . . . . Rogeria procera
Rogeria procera H casent0280814.jpg
Rogeria procera P casent0280814.jpg

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
Rogeria curvipubens casent0173282 head 1.jpg
Rogeria curvipubens casent0173282 profile 1.jpg

7

return to couplet #6

Rogeria innotabilis casent0603512 head 1.jpg
Rogeria innotabilis casent0603512 profile 1.jpg

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
Rogeria lirata H casent0900957.jpg
Rogeria lirata P casent0900957.jpg

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
Rogeria micromma fig 7.jpg
Rogeria micromma fig 18.jpg

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
Rogeria alzatei casent0178167 head 1.jpg
Rogeria alzatei casent0178167 profile 1.jpg
  • Head largely with short erect hairs; propodeal spines nearly parallel to longitudinal axis of the mesosoma . . . . . Rogeria scobinata
Rogeria scobinata casent0178169 head 1.jpg
Rogeria scobinata casent0178169 profile 1.jpg