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Feathered saurians -- downy dinosaur discovered
Date:7/3/2012

The new fossil find from the chalk beds of the Franconian Jura evokes associations with a pet cemetery, for the young predatory dinosaur reveals clear traces of fluffy plumage. It also poses an intriguing question: Were all dinosaurs dressed in down?

The fossil of the fledgling saurian, probably newly hatched when it met its end, is remarkable in many ways. First of all, juveniles are extremely rare in the dinosaur fossil record, so every new discovery provides insights into dinosaur nurseries. Moreover, this specimen is perhaps the best-preserved predatory dinosaur that has yet been found in Europe. And Sciurimimus albersdoerferi, which lived during the Jurassic Period some 150 million years ago, displays one very striking feature its whole body must have been covered with a thick plumage of feathers.

All the feathered dinosaurs so far described belonged to the lineage that gave rise to modern birds. "However, Sciurumimus belongs to a much older branch of the family tree of predatory dinosaurs," says LMU paleontologist Dr. Oliver Rauhut, who is also affiliated with the Bavarian State Collection for Paleontology and Geology, and led the investigation into the structure and affinities of the sensational new find. "Its plumage may be telling us that all predatory dinosaurs had feathers."

Were all dinos decked out with feathers?

Several fossil finds have revealed that the pterosaurs which were capable of flight and are the closest relatives of the dinosaurs bore hair-like plumage on their bodies. Their fluffy coats resemble the downy feathers that can be recognized in the new fossil. This observation is very significant, as it suggests to the researchers that not just the pterosaurs and the predatory dinosaurs, but all dinosaurs may have had feathers. "If that is the case, we must abandon all our notions about giant reptiles encased in tough scales," Rauhut says.

As the German-American research te
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Contact: Dr. Kathrin Bilgeri
kathrin.bilgeri@lmu.de
49-892-180-6938
Ludwig-Maximilians-Universitt Mnchen
Source:Eurekalert

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