I am doing research on Carboniferous "griffonflies" for a personal side project (I am not an entomologist by trade), and I am trying to find out just how similar or different these animals were to modern odonatans. I have heard from several sources that these animals had "large, toothed mandibles" (Grimaldi and Engel, 2005) or "well-developed raptorial mandibles" (Labandeira, 2002), but I cannot seem to find any good pictures of these appendages. Does anyone know any paper where these are described (possibly along with what we know about the paleobiology of the griffonflies?)

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