Image: Origin of Turtle Body Plan

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Description: Diagram of origins of turtle body plan in the Triassic. The key question is how the turtle got its shell. The evidence suggests a gradual development of increasingly large bony plates that eventually joined to form a complete shell.
Author: Rainer R. Schoch and Hans-Dieter Sues
Usage Terms: Creative Commons Attribution-Share Alike 3.0
License: CC-BY-SA-3.0
License Link: http://creativecommons.org/licenses/by-sa/3.0/
Attribution Required?: Yes
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