Data from: The early composition and evolution of the turtle shell (Reptilia, Testudinata)

Tomasz Szczygielski & Tomasz Sulej
The shell of the oldest true turtle (Testudinata) branch (Proterochersidae) from the Late Triassic (Norian) of Poland and Germany was built in its anterior and posterior part from an osteodermal mosaic which developed several million years after the plastron, neurals, and costal bones. The most detailed description of the shell composition in proterochersids thus far is provided together with a review of the shell composition in other Triassic pantestudinates, the scenario of early evolution of...
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