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 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.
- Anonymous (1866). "Another new Wealden reptile." The Athenaeum, 2014: 740.
- Naish, D. (2002). "The historical taxonomy of the Lower Cretaceous theropods (Dinosauria) Calamospondylus and Aristosuchus from the Isle of Wight." Proceedings of the Geologists' Association, 113: 153-163.
- Holtz, Thomas R. Jr. (2011) Dinosaurs: The Most Complete, Up-to-Date Encyclopedia for Dinosaur Lovers of All Ages, Winter 2010 Appendix.
- Naish, D. 2011. Theropod dinosaurs. In Batten, D. J. (ed.) English Wealden Fossils. The Palaeontological Association (London), pp. 526–559.
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