Children (10 direct children, 68 direct and indirect children):
Leptocleididae
(tree size 15)
Cimoliasauridae
(tree size 1)
Plesiosauridae
(tree size 24)
Aristonectidae
(tree size 9)
Cryptoclidia
Eoplesiosaurus
(tree size 1)
Leurospondylus
(tree size 1)
Microcleididae
(tree size 7)
Euplesiosauria
Plesiopharos