Meaning of name: Keel jaw.
Brazil, Early Cretaceous.
Classification: Pterosauria, Pterodactyloidea, Ornithocheiridea.
Tropeognathus is a member of the Ornithocheiridae & may be the same as Ornithocheirus but robustus has a triangular extension at the front of its lower jaw.
There are claims of Santana ornithocheirids with wingspans up to 9m (Dalla Vicchia and Ligabue 1993) but based on fragmentary remains. However it is generally accepted that Pterosaurs & Dinosaurs had a growth pattern more like crocodiles and old individuals could get very big, Most didn’t make it and giants were rare. I read that based on growth rings the average age for a Tyrannosaurus was 12 and a weight of 2 tones but for the media that doesn’t put bums in seats. I like your name
Your welcome, scientist worked out the practical limit for a pterosaurs wingspan was 65ft (20m) and if a Sauropod exceeded 220 tons its legs would be so fat it couldn’t walk