Wiktionary
co-existed
alt. (en-past of: co-exist) vb. (en-past of: co-exist)
Usage examples of "co-existed".
When I found in La Plata [Argentina] the tooth of a horse embedded with the remains of Mastodon, Megatherium, Toxodon, and other extinct monsters, which all co-existed at a very late geological period, I was filled with astonishment.
When I found in La Plata the tooth of a horse embedded with the remains of Mastodon, Megatherium, Toxodon, and other extinct monsters, which all co-existed with still living shells at a very late geological period, I was filled with astonishment.
The pressure at these depths was so great that the water in contact with the red-hot magma could not flash into steam, so the two liquids co-existed in an uneasy truce.