Sauropterygia (Taxonomic Rank: Suborder)
Extinct aquatic diapsid reptiles including the Plesiosauria, Nothosauria, Pachypleurosauria, Placodontiformes, and relatives.

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	Atopodentatus

= Extinct Life Forms   = Living Organisms   = Imaginary Creatures   = Inanimate Objects   = Spiritual Entities    = At least one collectible is catalogued