Peteinosaurus

The first vertebrates to truly fly, on wings of skin stretched from a hugely long fourth finger. They ranged from sparrow-sized to wingspans of more than 10 metres.

Who it is related to: The closest relatives of the dinosaurs, splitting off in the Triassic, but not dinosaurs, and not the ancestors of birds.

This page has only the scientific data from the databases; there is no hand-written description yet.