Assertion: snail's radula | /r/HasAspect | seven small cusps
Facets:
value: in one north american population
type: LOCATION
value: on the marginal tooth
type: LOCATION
value: as a general guide
type: PURPOSE
Source sentences:
text: However, as a general guide, in one North American population, the radula of Cipangopaludina chinensis had seven small cusps on the marginal tooth and a large central cusp with four small cusps on either side.