Name: Cryptosaurus ‭(‬Hidden lizard‭)‬.
Phonetic: Krip-toe-sore-us.
Named By: Harry Govier Seeley‭ ‬-‭ ‬1869.
Synonyms: Cryptodraco eumerus.
Classification: Chordata,‭ ‬Reptilia,‭ ‬Dinosauria,‭ ‬Ornithischia,‭ ‬Thyreophora,‭ ‬Ankylosauria.
Species: C.‭ ‬eumerus‭ (‬type‭)‬.
Diet: Herbivore.
Size: Unknown.
Known locations: England‭ ‬-‭ ‬Ampthill Clay Formation.
Time period: Oxfordian of the Jurassic.
Fossil representation: Partial femur‭ (‬OUM J.46882‭)‬,‭ ‬about‭ ‬33‭ ‬centimetres long.

       Today Cryptosaurus is considered to be a genus of ankylosaur,‭ ‬though because it is only known by a partial femur the genus is considered dubious because it would be almost impossible to assign further remains to the genus.‭
       When first described by Harry Govier Seeley,‭ ‬Cryptosaurus was thought to have been a relative of Iguanodon,‭ ‬and later Friedrich von Huene thought it was a slightly different kind of ornithopod,‭ ‬and assigned it to the camptosauridae.‭ ‬Richard Lydekker also created the name Cryptodraco for the bone in‭ ‬1889,‭ ‬but since this was unnecessary it is now treated as a synonym to Cryptosaurus.

Further reading
-‭ ‬Index to the Fossil Remains of Aves,‭ ‬Ornithosauria,‭ ‬and Reptilia from the Secondary System of Strata,‭ ‬arranged in the Woodwardian Museum of the University of Cambridge,‭ ‬Harry Govier Seeley‭ ‬-‭ ‬1869.
-‭ ‬On the Femur of Cryptosaurus eumerus,‭ ‬Seeley,‭ ‬a Dinosaur from the Oxford Clay of Great Grandshen,‭ ‬Harry Govier Seeley‭ ‬-‭ ‬1875.
-‭ ‬Armored dinosaurs‭ (‬Ornithischia:‭ ‬Ankylosauria‭) ‬from the Middle and Upper Jurassic of Europe,‭ ‬Peter M.‭ ‬Galton‭ ‬-‭ ‬1983.


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