Tag Archives: rostrata

The discovery of a 423-million-year-old fossil in China has shed light on the evolution of the tripartite (three-part) jaw, revealing a previously unknown stage of jaw evolution in placoderms, an extinct group of early fishes. Life reconstruction of Qilinyu along with Guiyu and Entelognathus in Silurian waters. Image credit: Dinghua …

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