JOHN SIBBICK / SCIENCE PHOTO LIBRARY JOHN SIBBICK / SCIENCE PHOTO LIBRARY
Permian fauna. Illustration of animals in a prehistoric landscape dating from the Late Permian. The specific time period is the Vyatskian, a Russian regional geological stage equivalent to the Wuchiapingian (259 to 254 million years ago). The fauna included amphibians such as Intasuchus and Rhinesuchus (lower frame), and therapsids such as Cistecephalus and Gorgonops and Inostrancevia (upper frame).
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