Assertion: plesiosaur | /r/HasProperty | clade
Facets:
Source sentences:
text: The Plesiosauria ( ; Greek: πλησίος, plesios, meaning "near to" and sauros, meaning "lizard") or plesiosaurs are an order or clade of extinct Mesozoic marine reptiles (marine Sauropsida), belonging to the Sauropterygia.
text: True pliosaurids, in contrast, are primitive in the plesiosaur family tree as testified by their complete set of mandibular bones, and out-group to all other plesiosaurs (clade Plesiosauroidea).