Assertion: mastodon's population | /r/CapableOf | evolve 12–14 ridges
Facets:
Source sentences:
text: A population evolved 12–14 ridges, splitting off from and replacing the earlier type, becoming M. meridionalis about 2.0–1.7 million years ago.
text: A population evolved 12–14 ridges and split off from and replaced the earlier type, becoming M. meridionalis.
text: A population evolved 12–14 ridges, splitting off from and replacing the earlier type, becoming M. meridionalis about 2–1.7 million years ago.