Key to Dinoponera males

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This key to males is based on: Lenhart, P.A., Dash, S.T. & Mackay, W.P. 2013. A revision of the giant Amazonian ants of the genus Dinoponera (Hymenoptera, Formicidae). Journal of Hymenoptera Research 31, 119–164. and as modified by: Escarraga, M. E., J. E. Lattke, and C. O. Azevedo. 2017. Discovery of the Dinoponera lucida male (Hymenoptera, Formicidae), a threatened giant ant from the Atlantic rain forest. Zootaxa. 4347:128-136. doi:10.11646/zootaxa.4347.1.7.

Males are not known for Dinoponera hispida and Dinoponera mutica.

Couplets 1 and 2 are included to easily separate males of other genera which are likely confused with Dinoponera

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  • Total body length less than 15 mm..........Pachycondyla and other poneroids


return to couplet #1

  • Subpetiolar process in form of spine; pronotum heavily sculptured; palp formula 5:3.....................................................................................Paraponera
  • Subpetiolar process without spine; pronotum shiny, microsculptured; palp formula 4:3 . . . . . 3


return to couplet #2

  • Ocelli protruding on occipital margin of head (Fig. 4A–D) . . . . . 4
  • Ocelli not protruding on occipital margin of head (Fig. 4E); Bolivia, Paraguay, northern Argentina and southern Brazil . . . . . Dinoponera australis
Figure 4. Features of Dinoponera males. A–E Head, frontal view F–J Right scape, first and second funicular segments, frontal view K–O Pygidial spine, dorsal view A, F, K Dinoponera gigantea B, G, L Dinoponera quadriceps C, H, M Dinoponera longipes D, I, N Dinoponera snellingi E, J, O Dinoponera australis.


return to couplet #3

  • Setae on flagellum longer than the segment's width and erect (Fig. 4F, G) . . . . . 5
  • Setae on flagellum absent or shorter than the segment's width, stiff and subdecumbent (Fig. 4H, I, J) . . . . . 6


return to couplet #4

  • Digitus volsellaris with toothless lobe at distal end (Fig. 10C); Brazil, Peru, and Guyana . . . . . Dinoponera gigantea
  • Digitus volsellaris without lobe at distal end (Fig. 10A); northeast Brazil . . . . . Dinoponera quadriceps
Figure 10. Dinoponera right volsella of known males, lateral view. A Dinoponera quadriceps B Dinoponera snellingi C Dinoponera gigantea D Dinoponera australis E Dinoponera longipes.


return to couplet #4

  • Penis valve of aedeagus wedge-shaped in lateral view (Fig. 11E); abdominal tergum VIII ending in narrow, elongate spine or in acute, triangular angle; . . . . . 7
  • Pygidium terminating in short, broad, triangular angle (Fig. 4N); penis valve of aedeagus with distal flange and triangular ventral lobe (Fig. 11B); abdominal tergum VIII ending in short, broad, triangular angle; Mato Grosso do Sul, Brazil . . . . . Dinoponera snellingi
Figure 11. Dinoponera right penis valves from the aedeagus of known males. A Dinoponera quadriceps B Dinoponera snellingi C Dinoponera gigantea D Dinoponera australis E Dinoponera longipes.


return to couplet #6

  • Abdominal tergum VIII terminating in narrow, elongate spine (Fig. 4M); Colombia south to Perú to north western Brazil . . . . . Dinoponera longipes
  • Abdominal tergum VIII terminating in a very acute triangular angle; Bahia, Espírito Santo, Minhas Gerais, São Paulo . . . . . Dinoponera lucida
Dinoponera lucida m F1.jpg
Dinoponera lucida male abdominal tergum VIII (A) and penisvalva (B).