Odontochelys

Odontochelys semitestacea (meaning "toothed turtle with a half-shell") is a Late Triassic relative of turtles.[1]  Before Pappochelys was discovered and Eunotosauruswas redescribed,[2]  Odontochelys was considered the oldest undisputed member of Pantestudines (i.e. a stem-turtle). It is the only known species in the genus Odontochelys and the family Odontochelyidae.