This paleontological restoration is inaccurate, or its accuracy is disputed.
Reason: Carapace of Notochelone does not exceed 1 m.[1][2]Archelon is perspective, so not usable for size comparison chart.
You may ask further questions about the accuracy of this image at the image review page of Wikiproject Palaeontology on the English Wikipedia. Note that this image may be appropriate to illustrate obsolete paleontological views.
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{{Information |Description={{en|1=Size comparison of three members of the ''Protostegidae'' family : ''Protostega gigas'', ''Archelon ischyros'', and ''Notochelone costata'', with a human scale. Own work after the pictures : File:Archelon BW.jpg