Telmatobius culeus. I wonder if these hatched from the spawn that @Gigit photographed in August.They were quite large, 6 or 7 cm long and one or two were showing very small front limbs.
@gentle lemur 9 December: some now have back legs. They are huge especially when you think of tadpoles in your garden pond which develop into frogs about the same size as these frogs. One tadpole swam up to the surface for air so presumably they don't yet share the ability of the adults to stay under water. Condensation on the side of the tank prevented my taking a photo.
