3: Identification of a mastodon from Mexico as highly diverged from both (maybe American, maybe Pacific, maybe something else - we're looking into it).
4: At least 3 (likely 4) mastodon migrations into the eastern parts of North America during interglacials!
#mastoDNA

We propose this model of mastodon phylogeography (below), and highlight four major takeaways:
1+2: First pacific mastodon DNA; Pacific mastodons in Alberta and overlap with American mastodons in space and time.