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Key to Mycetagroicus
This worker key is based on: Brandão, C. R. F. and A. J. Mayhé-Nunes. 2008. A new species of the fungus-farming ant genus Mycetagroicus Brandão & Mayhé-Nunes (Hymenoptera, Formicidae, Attini). Revista Brasileira de Entomologia. 52(3):349-352.
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- Lateral clypeal projections absent; frontal lobes rounded, their largest width posterior to the antennal insertions, from where they curve inwards, not forming a strong constriction; median pronotal projections present; posterior face of mesonotum vertical in side view, with a high posterior projection . . . . . Mycetagroicus urbanus
- Lateral clypeal projections present, better seen with head in side view; frontal lobes rounded or subtriangular; median pronotal projections present or absent; posterior face of mesonotum oblique in side view . . . . . 2
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- Lateral clypeal projections conspicuous, flat, narrow, curved out and forwards, with rounded apex in side view; frontal lobes subtriangular, the anterior borders rounded, crenulated, and almost as long as posterior borders; median pronotal projections very short or absent . . . . . Mycetagroicus cerradensis
- Lateral clypeal projections small, triangular in side view; frontal lobes rounded; median pronotal projections present . . . . . 3
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- Posterior vertexal margin weakly notched, between the occipital lobes; mandibles with eight teeth; pair of median pronotal projections laterally flattened, with sharp apex; sagital keel on sternum I of the gaster; integument shagreened, without reticulation; longer and curved erect hairs on body and appendages . . . . . Mycetagroicus triangularis
- Posterior vertexal margin strongly notched, between the protrude occipital lobes; mandibles with six teeth; pair of median pronotal projections conical, with blunt apex; sagital keel of sternum I of the gaster inconspicuous; integument finely reticulated; short and curved apressed hairs on body and appendages . . . . . Mycetagroicus inflatus
