A clade including all plesiosaurs (Plesiosauria) plus the ‘basal sauropterygians’ Augustasaurus, Pistosaurus, Yunguisaurus and Bobosaurus. Some classifications place non-plesiosaur pistosaurians into a single clade (family), Pistosauridae. However, recent phylogenetic analyses suggest ‘pistosaurids’ are really a paraphyletic group that do not form a single clade.
Pistosauria
