Ladies and gentlemen: turtle frogs.
Yep, you heard me right. Turtle frogs. Nature’s middle finger to those of us who thought we understood evolution well enough to get by. Arenophrynde rotunda, the Northern Sandhill Frog and Myobatrachus gouldii, the Western Australian frog. I’m told there exists a Southern Sandhill Frog, a.k.a. A. xiphorhyncha, but so little is known about it that I would feel silly pointing you to a reference.
Okay, that’s not entirely true, but neither is it a matter of simply being lazy.
Meanwhile, if you want to read up on M. gouldii, the Western Australian Museum has an excellent paper from Marion Antsis, Dale Roberts, and Ronald Altig on neobatrachial reproduction.
Meanwhile, see also:
Western Australia Museum: Frogwatch
Real Monstrosities, “Turtle Frog”
Wikipedia: Myobatrachus goldii