Sentences with phrase «pterosaurs with»

«The Daohugou Biota gives us a look at a rarely glimpsed side of the Middle to Late Jurassic - not a parade of galumphing giants, but an assemblage of quirky little creatures like feathered dinosaurs, pterosaurs with advanced heads on primitive bodies, and the Mesozoic equivalent of a flying squirrel,» lead author Corwin Sullivan, an associate professor at the Institute of Vertebrate Paleontology and Paleoanthropology, was quoted as saying in a press release.

While working in Mexico, paleontologist Eberhard Frey of the Natural History Museum in Karlsruhe, Germany, discovered the footprints of a pterosaur with a wingspan of at least 59 feet — larger than that of a modern fighter jet.

Not exact matches

The team compared the thickness of the bones» walls and their resistance to torsion — a twisting force that birds» wings withstand during flapping flight — with similar bones from several dinosaurs, flying reptiles called pterosaurs and modern birds.

During this struggle the pterosaur drowned with the small fish it had caught halfway down its throat.

The Daohugou Biota makes an immense contribution to our understanding of vertebrate evolution during this period, with such notable creatures as the oldest known gliding mammal, another early mammal that may have swum with a beaver - like tail, the oldest dinosaurs preserved with feathers, and a pterosaur that represents an important transitional form between two major groups.

These teeth became entangled with the tough fibres, or aktinofibrils, that reinforced the wing membranes of the pterosaur, Rhamphorhynchus muensteri.

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.

Pterosaurs and primitive birds glided above, and rivers teemed with turtles, fish, and fish - eating plesiosaurs.

The specimen is unusual as most pterosaurs from the Late Cretaceous were much larger with wingspans of between four and eleven metres (the biggest being as large as a giraffe, with a wingspan of a small plane), whereas this new specimen had a wingspan of only 1.5 metres.

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

The first known pterosaur egg reveals a well - developed embryonic skeleton, com - plete with wing membranes and skin impressions.

As with other evidence of smaller pterosaurs, the fossil specimen is fragmentary and poorly preserved: researchers should check collections more carefully for misidentified or ignored pterosaur material, which may enhance our picture of pterosaur diversity and disparity at this time.»

Either way, the pterosaurs would have needed sophisticated neural control on a par with modern birds, the researchers say.

The cache of more than 200 fossil eggs found with bones of juvenile and adult animals in northwestern China suggests to some researchers that pterosaur parents may have cared for their newly hatched young.

With throats and jaws much wider than other pterosaurs, they could have swallowed small dinosaurs whole.

The Jehol birds faced competition with pterosaurs, and occupied sympatric habitats with nonavian theropods, some of which consumed birds.

The pattern suggests a landing from the air, with the pterosaur touching down simultaneously with both feet and dragging its toes with the forward momentum.

Now, Palmer's wind tunnel tests with models of the pterosaur wing are a second chapter to this story, filling out the full picture for how these reptiles used their unique limbs to stay in the air.

Pterosaurs grew large in the late Cretaceous, with a 10 to 12 - metre wingspan.

Although Cimoliopterus dunni would have been large, it was mid-sized as pterosaurs go, with a wingspan of about 6 feet.

The new Texas native, Cimoliopterus dunni, is only the third pterosaur species with teeth from the Cretaceous of North America.

Scientists had suspected that the scarcity of little flying reptiles might be due to birds — that the pterosaurs just had trouble competing with them.

Floodwaters from an intense storm may have swept away and buried hundreds of pterosaur eggs in this bone bed, along with the scattered remains of a few adults.

Starting with the first primitive vertebrates, they go through the early fishes, amphibians and reptiles, pterosaurs, dinosaurs, primitive mammals, and recent mammals.

The collection features such memorable creatures as the oldest known gliding mammal, another early mammal that may have swum with a beaver - like tail, the oldest dinosaurs preserved with feathers and a pterosaur that represents an important transitional form among these now extinct, warm - blooded flying reptiles.

Competition with early bird species may have contributed to a decline in pterosaurs so that, by the end of the Cretaceous, only large species of pterosaurs still existed.

After students complete this Pterosaur coloring page, explain that these were not birds but flying reptiles that evolved along with the dinosaurs.