Trionychia
Trionychia is a superfamily of turtles which encompasses the species that are commonly referred to as softshelled turtles as well as some others. They are found throughout the temperate regions of the world. The Jurassic genus Sinaspideretes is considered the earliest representative of the superfamily.Systematics
Except for those not assigned to a family, only living genera are listed here.
is a primitive relative of the true softshells which still has a typical hard turtle shell
