Children (15 direct children, 27 direct and indirect children):
Chelydra
(tree size 3)
Acherontemys
Chelydropsis
(tree size 4)
Chelydrops
Emarginachelys
Macrocephalochelys
Planiplastron
Protochelydra
Macrochelys
(tree size 4)
Alligator snapping turtle
Chelydropsinae
Tretosterninae
Protochelydrinae
Chelydrinae
Chelonura
Macroclemys
(tree size 1)