Walking Tetsudo

The walking tetsudo replaced its ancestor the crawling testudo. Its 4 back flippers have become thick supporting legs. Its front 2 flippers have become sound sensing "ears". The bristles on them detect primitive sounds. Enough to know when something is nearby. Its 3 nostrils have become a bulge on the top of the head to help smell out iron and flora. Its large mandibles both help dig up iron from the ground but slice off flora. Since it grew it needed to breathe more it has developed breathing holes on the outer edge of it shell. Like its ancestor its thick iron shell is rough like sandpaper. The same holes now double as reproductive holes. They now have developed sexual reproduction, however they are hermaphrodites. They no longer bud off but grow iron eggs. These eggs are very small and have an iron shell. If they do mate they will stand next to each other and blow genetic material out of their breathing holes while the other breaths in. Not all makes it into the holes of the mate. The iron eggs are laid in dirt mound nests. Once buried under the soil the parent leaves and they must grow up on their own.