Sentences with phrase «pterosaur embryo»

One egg contains a nearly complete pterosaur embryo.

No one would expect a baby bird to take flight immediately after hatching, yet paleontologists who have examined the first known pterosaur embryo think that's exactly what the fledgling reptiles once did.

Not exact matches

Lastly, the fact that a single collection of embryos exhibits a range of developmental stages hints that pterosaurs participated in colonial nesting behavior, the authors say.

To date, only a small handful of pterosaur eggs with a well - preserved 3 - D structure and embryo inside have been found and analyzed — three eggs from Argentina and five from China.

Egg accumulation with 3D embryos provides insight into the life history of a pterosaur.

When the two researchers first caught sight of the embryo's sturdy upper arm bone and extremely long fourth finger, they «immediately recognized it as belonging to a pterosaur,» Zhou recalls.

Finding fossilized eggs containing 3 - D embryos opens a new window into pterosaur development, says coauthor Alexander Kellner, a vertebrate paleontologist at Museu Nacional / Universidade Federal do Rio de Janeiro.

But enough is preserved to allow comparisons between the bones in the embryos and those of older pterosaurs also preserved, says Alexander Kellner of the National Museum at the Federal University of Rio de Janeiro in Brazil, who helped analyze the fossils.

THE largest ever trove of pterosaur eggs and embryos has been found in China.

Pterosaurs evolved some 220 million years ago and only a few eggs and embryos have ever been found.

Two of the best - preserved embryos revealed a tantalizing clue to pterosaur development, Kellner says.