Name: Mammacyon ‭(‬Mammal dog‭)‬.
Phonetic: Mam-ma-sy-on.
Named By: Loomis‭ ‬-‭ ‬1936.
Classification: Chordata,‭ ‬Mammalia,‭ ‬Carnivora,‭ ‬Caniformia,‭ ‬Amphicyonidae,‭ ‬‭)‬.
Species: M.‭ ‬obtusidens‭ (‬type‭), M. ferocior.
Diet: Carnivore.
Size: Estimated around‭ ‬39‭ ‬kilograms in weight.
Known locations: USA.
Time period: Rupelian of the Oligocene through to the Aquitanian of the Miocene.
Fossil representation: Several specimens.

       Mammacyon was a‭ ‘‬bear dog‭’ ‬that has been assigned to the Temnocyoninae,‭ ‬and not surprisingly is thought to have been considered to be similar to the group type genus Temnocyon.‭ ‬Mammacyon seems to have been active at the same time as Temnocyon as well as many of the same locations,‭ ‬although the current range of fossil deposits for Mammacyon suggests that it did not have the same broad distribution as Temnocyon.‭ ‬So far Mammacyon has only been found in Florida‭ (‬south east USA‭) ‬as well as Wyoming,‭ ‬Nebraska and South Dakota‭ (‬central north USA‭)‬.‭ ‬It’s quite reasonable that Mammacyon was also active between these areas at some point,‭ ‬but so far a lack of remains means that the full range of Mammacyon can only be speculated.

Further reading
- Three new Miocene dogs and their phylogeny. - Journal of Paleontology 10(1):44-52. - F. B. Loomis - 1936.


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