Relatively few pterosaur fossils are preserved because of the animal's fragile, thin-walled bones . The first three-dimensionally preserved pterosaur egg came from Argentina from an animal called Pterodaustro, previously known from several specimens and eggs that are mostly crushed. Palaeontologists have found other sites with lots of pterosaur bones before , suggesting they were social animals. Since at least some other pterosaur embryos possess teeth, this might indicate that the Hamipterus embryos are of an earlier developmental stage, before tooth development. This find adds to recent discoveries of soft Darwinopterus pterosaur eggs and hundreds of Caiuajara pterosaur fossils.

Source: CNN December 01, 2017 09:33 UTC