''Ailurarctos'' ("cat bear") is an extinct

genus Genus ( plural genera ) is a taxonomic rank used in the biological classification of living and fossil organisms as well as viruses. In the hierarchy of biological classification, genus comes above species and below family. In binomial nom ...

panda The giant panda (''Ailuropoda melanoleuca''), also known as the panda bear (or simply the panda), is a bear species endemic to China. It is characterised by its bold black-and-white coat and rotund body. The name "giant panda" is sometimes use ...

from the Late

Miocene The Miocene ( ) is the first epoch (geology), geological epoch of the Neogene Period and extends from about (Ma). The Miocene was named by Scottish geologist Charles Lyell; the name comes from the Greek words (', "less") and (', "new") and mea ...

of China, some 8

million years ago The abbreviation Myr, "million years", is a unit of a quantity of (i.e. ) years, or 31.556926 teraseconds. Usage Myr (million years) is in common use in fields such as Earth science and cosmology. Myr is also used with Mya (million years ago) ...

. Different teeth structures in the ''

Ailuropoda ''Ailuropoda'' is the only extant genus in the ursid (bear) subfamily Ailuropodinae. It contains one living and three fossil species of panda. Only one species—''Ailuropoda melanoleuca''—currently exists; the other three species are prehis ...

'' lineage indicate a

mosaic evolution Mosaic evolution (or modular evolution) is the concept, mainly from palaeontology, that evolutionary change takes place in some body parts or systems without simultaneous changes in other parts. Another definition is the "evolution of characters ...

during the past 2 million years. Like modern giant pandas, ''Ailurarctos'' had a false thumb that allowed it to grip bamboo, suggesting that the panda's specialized bamboo diet goes back to as early as 6 to 7 million years ago.Wang, X., Su, D.F., Jablonski, N.G. et al. ''Earliest giant panda false thumb suggests conflicting demands for locomotion and feeding''. Sci Rep 12, 10538 (2022). https://doi.org/10.1038/s41598-022-13402-y

References

Miocene mammals of Asia Fossil taxa described in 1989 Miocene bears Prehistoric carnivoran genera {{paleo-carnivora-stub