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Ant key 27

Upper plate of second segment of gaster strongly arched so that it forms the rear-most part of the gaster when viewed from the side, and short 9-segmented antennae (but appears <9), with apical segment greatly enlarged (Fig. a).   Discothyrea antarctica
Upper plate of second segment of gaster only weakly arched (Fig. b), and 12-segmented antennae. Apical segments either not enlarged or more than 1 segment enlarged. 28
[Discothyrea antarctica] profile. Image: April Nobile (Specimen: CASENT0172126). www.antweb.org Image
Discothyrea antarctica profile. Image: April Nobile (Specimen: CASENT0172126). www.antweb.org
Fig. b [Hypoponera eduardi] profile. Image: April Nobile (Specimen: CASENT0172333). www.antweb.org Image
Fig. b Hypoponera eduardi profile. Image: April Nobile (Specimen: CASENT0172333). www.antweb.org