While the red panda is considered a procyonid, the mainstream view now is that the giant panda is indeed a bear, although it diverged from the main ursid line long enough ago to exhibit some striking differences in addition to the enlarged radial sesamoid, such as chromosome number, skull anatomy, and other traits. From Wordnik.com. [The Panda's Thumb has Evolved ... Twice! - The Panda's Thumb] Reference
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