Assertion: barnacle's pair | /r/CapableOf | type the operculum
Facets:
value: on prime
type: LOCATION
value: in a diamondshaped association
type: OTHER
Source sentences:
text: On prime, two pairs of quick calcareous and articulated plates, the terga and scuta (one pair on both sides) type the operculum in a diamondshaped association; it encloses the mantle cavity and will be opened and closed by muscle groups.