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23. Clypeal margin (a1, a2) bilobed, lobes thin and flange-like. Propodeum (b1, b2) with strong median carina and plicae (similar to Notanisomorphella).
23'. Clypeal margin not bilobed or sharply emarginate, at most broadly concave (aa1). Propodeum often without median carina and/or plicae.
aa1 | ||
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Image credits: a1, a2, b1, b2: Ikeda & Huber (1996). aa1: Schauff, et al. (1997).