migrated across the Bering land bridge into North America, marking the beginning of the Rancholabrean faunal stage. Around 500,000 years ago, the last members of the largely European aquatic frog genus Palaeobatrachus and by extension the family Palaeobatrachidae became extinct.

Palaeoanthropology

The Chibanian includes the transition in palaeoanthropology

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