Assertion: mollusk's shell | /r/HasProperty | spherical
Facets:
value: obliquely
type: MANNER
value: in most surface-burrowing species
type: OTHER
Source sentences:
text: In most surface-burrowing species (the hypothetical ancestral habit) the shells are small, spherical or oval, with equal left and right valves.
text: The brittle shells are of uniform size, are obliquely spherical, and possess distinct radiating ridges, or ribs, which aid the animal in