Calamospondylus (meaning "quill vertebrae") was a theropod dinosaur genus. It lived during the Early Cretaceous, and its fossils were found in England. The type species, Calamospondylus oweni, was described anonymously by amateur paleontologist Reverend William D. Fox in 1866, but is based on fragmentary material. It has been part of a confusing taxonomic issue also involving Aristosuchus and Calamosaurus (which was also named "Calamospondylus", but then renamed). It may have been a primitive oviraptorosaurian.
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