Children (16 direct children, 16 direct and indirect children):
Plesiosaurus bernardi
Plesiosaurus brachistospondylus
Plesiosaurus eleutheraxon
Plesiosaurus hawkinsi
Plesiosaurus holmesii
Plesiosaurus hoodii
Plesiosaurus limnophilus
Plesiosaurus macrocephalus
Plesiosaurus planus
Plesiosaurus portlandicus
Plesiosaurus rostratus
Plesiosaurus traversii
Plesiosaurus trochanterius
Plesiosaurus truncatus
Plesiosaurus dolichodeirus
Plesiosaurus gurgitis