Assertion: plesiosaur's flipper | /r/HasProperty | thalassiodracon
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Source sentences:
text: However, stratigraphically early and morphologically plesiomorphic pliosauromorphs have high AR flippers (Thalassiodracon , Rhomaleosaurus ), as do early plesiosauromorphs (Plesiosaurus ), indicating that high AR is probably the primitive condition for the clade as a whole.