Sinopterus dongi was a tapejarid pterosaur that lived during the early Cretaceous, around 120 million years ago, in a temperate forest in what is now northeastern China.
It’s known from multiple specimens representing different life stages, with the largest fully mature individuals reaching a wingspan of about 1.9m (6’2″). Like other tapejarids it had a toothless parrot-like beak, and a low bony crest on its skull may have supported a larger soft-tissue structure.
A specimen with gut contents has been found showing evidence of plant matter and gastroliths, suggesting that Sinopterus was primarily herbivorous.
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