Name: Aublysodon ‭(‬Backward flowing tooth‭)‬.
Phonetic: Ow-blih-so-don.
Named By: Joseph Leidy‭ ‬-‭ ‬1868.
Classification: Chordata,‭ ‬Reptilia,‭ ‬Dinosauria,‭ ‬Saurischia,‭ ‬Theropoda,‭ ‬Tyrannosauroidea,‭ ‬Tyrannosauridae,‭ ‬Aublysodontinae.
Species: A.‭ ‬mirandus‭ (‬type‭)‬.‭ ‬Also the species A.‭ ‬lateralis,‭ ‬A.‭ ‬grandis,‭ ‬A.‭ ‬amplus and A.‭ ‬cristatus are sometimes mentioned but these are considered to be highly dubious.
Diet: Carnivore.
Size: Uncertain due to incomplete fossil material.
Known locations: USA,‭ ‬Montana‭ ‬-‭ ‬Judith River Group.‭
Time period: Late Cretaceous.
Fossil representation: Teeth.

       It‭ ‬is quite surprising when you think about how‭ ‬Aublysodon is represented in so many dinosaur books and internet sources even though back when it was described in‭ ‬1868‭ ‬it was only from teeth.‭ ‬Still this was a sign of the times back then with other discoveries such as Troodon,‭ ‬which was also named by Joseph Leidy,‭ ‬also‭ ‬initially‭ ‬only being described from their teeth.
       Aside from the type specimens,‭ ‬further teeth have been attributed to Aublysodon and given separate species.‭ ‬However further study of these specimens has revealed that they probably belong to other tyrannosaur genera,‭ ‬possibly juvenile individuals of Tyrannosaurus.‭ ‬Partial skulls and post cranial remains have also in the past been attributed to Aublysodon,‭ ‬but upon more detailed study have been found to probably belong to Daspletosaurus.‭
       The future for Aublysodon as a distinct genus of dinosaur is highly uncertain because not only is it difficult to attribute remains to this genus,‭ ‬the original holotype specimen is now lost to science.‭ ‬This makes it impossible to re-examine the holotype to confirm if Aublysodon should remain its own genus.

Further reading
- Remarks on a jaw fragment of Megalosaurus. Proceedings of the Academy of Natural Sciences of Philadelphia. - J. Leidy - 1868.


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