Theropoda,
Coelurosauria von Huene, 1914

Ornithodesmus cluniculus Seeley, 1887

A small theropod, Ornithodesmus would probably have hunted smaller dinosaurs and lizards.
(More info can be found at DinoWight Palaeoecology)

Description of Material

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Six vertebrae, which are all fused. Viewed laterally, the sacrum is slightly arched, with continuous neural blade formed by the neural spines. A platform projects from the bases of the neural spines and links with the diapophyses. There is a shallow sulcus along the ventral surface of the fused sacral vertebrae and the first two vertebrae have pleurocoels, set in deep excavations.

Little bit of history, as this entry's a bit short. Ornithodesmus was originally described as a bird, was then re-described as a pterosaur, was then discovered to be a dinosaur, was classified as a troodontid (although the material it was compared to eventually turned out to be misidentified itself), then a dromaeosaur. Basically, no-one really knows what it is, although most palaeontologists agree it is a dromaeosaur. Even if it is, it is not the same as the large velociraptorine(s) which is known from the island.

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