Fly River turtle of northern Australia and southern New Guinea.
Carettochelys insculpta
This is an unusual turtle similar in appearance to our soft-shell turtles, but unrelated. It is the only species in its family.
Unlike soft-shell turtles the underlying bony shell of the carapace of Carettochelys extends all the way to the margin of the soft, leathery
tissue. With our soft-shells the soft margins are easily bitten off by predators.
I've had some experience with these turtles, keeping them in a large zoo, but we had inadequate facilities to display them.