Assertion: ribbon worm | /r/HasProperty | distinct phylum
Facets:
value: without a body cavity
type: OTHER
value: at the highest point of acoelomate
type: LOCATION
Source sentences:
text: In general, the ribbon worms are regarded as a distinct phylum at the highest point of acoelomate (without a body cavity) development; however, some evidence suggests that one proboscis cavity, or rhynchocoel, may be a true coelom.