Two-Faced Fish Fossil (IMAGE)

University of Oxford

Two-Faced Fish Fossil

Caption

The 415-million-year-old fish Janusiscus provides critical evidence for a well-developed external skeleton (shown in blue) in the shared ancestor of bony fishes and cartilaginous fishes such as sharks. Placoderm image courtesy of K Trinajstic.

Credit

Oxford University/K Trinajstic

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