Pretty sure that temporaria is related in this case to temporal, not temporary. It'd be like frog of the times or frog of the right season or something like that.
I could be wrong though.
As for little shits I would try something with copro- in it. That's the greek word for shit. Like coprophage is a shiteater or Copromorphidae are a family of moths that have shit like camouflage.

I prefer Boops boops. Pronounced Boh-ops.