anonymous asked:

i'm still a bit confused about teeth in pterosaurs, where toothed long tailed pterosaurs like dimorphodon just early pterosaurs,then later toothless species like pteranodon and azhdarchids were more a more successful adaptation? or is there little relation

Really, there’s only a few groups of toothless pterosaurs, and they were evolved for very different things (azhdarchoids were terrestrial stalkers and frugivores; pteranodontians were piscivores). I’d say it’s probably just chance that they’re the only ones we know of that survived until the latest cretaceous.