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meaning: "Bird link"
Named By: Harry Govier Seeley in 1887
Time Period: Early Cretaceous, 125 Ma
Location: England - Wessex Formation
Size: Uncertain due to lack of fossils, but comparison to related genera suggests that Ornithodesmus grew to roughly about 1.8 meters long
Diet: Carnivore
Fossil(s): Sacral vertebrae
Classification: | Chordata | Reptilia | Dinosauria | Saurischia | Theropoda | Dromaeosauridae |

Ornithodesmus (meaning "bird link") is a genus of small, dromaeosaurid dinosaur from the Isle of Wight in England, dating to about 125 million years ago. The name was originally assigned to a bird-like sacrum (a series of vertebrae fused to the hip bones), initially believed to come from a bird and subsequently identified as a pterosaur. More complete pterosaur remains were later assigned to Ornithodesmus, until recently a detailed analysis determined that the original specimen in fact came from a small theropod, specifically a dromaeosaur. All pterosaurian material previously assigned to this genus has been renamed Istiodactylus.

Read more about Ornithodesmus at Wikipedia
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