The article title is a little misleading - the tadpoles of this frog don’t poop because they’re only in a small amount of water and they’d quickly foul it if they pooped frequently like other animals. Instead, they wait until they start to become frogs, then they safely poop outside of their spawning pools.
I was interested in a list of species like this, but couldn’t find anything when searching for “autonym”. Did you mean “Tautonym” instead?