Rogeria, Emery, 1923

LaPolla, J. S. & Sosa-Calvo, J., 2006, Review of the ant genus Rogeria (Hymenoptera: Formicidae) in Guyana., Zootaxa 1330, pp. 59-68 : 59

Key to Rogeria known from 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 Body of clypeus not greatly projecting over clypeal apron (figs. 4 & 11); color brown to shiny dark brown....................................................................................................... 3

- In lateral view, body of clypeus greatly projecting over clypeal apron (fig. 20); color dull brown ............................................................................... prominula (figs. 9 & 20)

3 Smaller species (TL: 1.9 mm-2.9 mm); light brown to brown and dull......................... .......................................................................................................... foreli (figs. 4 & 15)

- Larger species (TL: 3.75 mm-3.88 mm); dark brown and shiny ....... tsumani (figs. 11 & 22)

4 In lateral view, petiolar node low and curving gradually into anterior peduncle (figs. 13 & 19)........................................................................................................................5

- In lateral view, petiolar node tall and more sharply differentiated from anterior peduncle, node rounded, subquadrate, or squamiform (figs. 12, 14, 16, 17, 18 & 21)........... 6

5 Dorsum of head rugoreticulate; area behind eyes rugoreticulate; reddish-brown.......... ....................................................................................................... blanda (figs. 2 & 13)

- Dorsum of head with distinct longitudinal carinulae; area behind eyes smooth and shiny; dark brown......................................................................... procera (figs. 8 & 19)

6 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............................... curvipubens (figs. 3 & 14)

7 Posterior portion of head rugoreticulate........................................................................8

- Posterior portion of head distinctly areolate........................... innotabilis (figs. 5 & 16)

8 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 ................................................................................................. lirata (figs. 6 & 17)

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

- Lateral surface of mesosoma without rugae, surface areolate; dull yellow.................... ................................................................................................. micromma (figs. 7 & 18)

10 Head largely with decumbent to appressed hairs; propodeal spines at roughly right angles relative to longitudinal axis of the mesosoma ....................... alzatei (fig. 1 & 12)

- Head largely with short erect hairs; propodeal spines nearly parallel to longitudinal axis of the mesosoma .............................................................. scobinata (figs. 10 & 21)