Assertion: tortoise's plastron | /r/HasProperty | bottom shell
Facets:
Source sentences:
text: > Male tortoises can be distinguished from female tortoises by their concave plastron (bottom shell).
text: The Gopher Tortoise is the only tortoise in the Southeast and can easily be distinguished from the box turtle (our only other fully terrestrial turtle) by its large size, rigid, unhinged plastron (bottom of shell) and its stumpy, unwebbed feet.
text: The plastron (the bottom shell) is usually the easiest way to differentiate; it tends to be flatter for females and more curved for males.