Name: Gwyneddosaurus.
Phonetic: Gwin-id-do-sore-us.‬
Named By: W.‭ ‬Bock‭ ‬-‭ ‬1945.
Classification: Chordata,‭ ‬Reptilia,‭ ‬Archosauromorpha,‭ ‬Prolacertiformes,‭ ‬Tanystrophidae.
Species: G.‭ ‬erici‭ (‬type‭)‬.
Diet: Carnivore/Piscivore‭?
Size: Roughly estimated to be about‭ ‬18‭ ‬centimetres long.
Known locations: USA,‭ ‬Pennsylvania‭ ‬-‭ ‬Lockatong Formation.
Time period: Norian of the Triassic.
Fossil representation: Partial and fragmentary remains.

       During its taxonomic history Gwyneddosaurus has been identified as being several different types of animals,‭ ‬from a theropod dinosaur to a protosaur.‭ ‬Today however the wider consensus is that Gwyneddosaurus was a relative to the better known Tanystropheus,‭ a marine reptile noted for having a particularly long neck.‭ ‬The type specimen of Gwyneddosaurus however is of a vastly smaller individual than what we usually see in Tanystropheus.‭ ‬There is speculation that Gwyneddosaurus may be synonymous with the genus Tanytrachelos,‭ ‬however if this were the case it would be preferable to preserve Tanytrachelos as a valid name since this genus is based upon vastly superior fossil remains than Gwyneddosaurus,‭ ‬which may have fossils from a coelacanth fish accidentally confused with it.

Further reading
-‭ ‬A new small reptile from the Triassic of Pennsylvania.‭ ‬-‭ ‬Notulae Naturae‭ ‬154:1-8.‭ ‬-‭ ‬W.‭ ‬Bock‭ ‬-‭ ‬1945.
-‭ ‬Notes on Gwyneddosaurus.‭ ‬-‭ ‬The American Journal of Science,‭ ‬series‭ ‬5‭ ‬246:208-213.‭ ‬-‭ ‬Friedrich von Huene‭ ‬-‭ ‬1948.


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