Assertion: mollusk | /r/CapableOf | arise before a sister group relationship
Facets:
value: with the sipunculans
type: OTHER
value: from within the spiralians
type: LOCATION
Source sentences:
text: Brusca and Brusca (2003) suggest that the mollusks arose from within the spiralians before the advent of segmentation and a sister group relationship with the sipunculans (they share similar larval characteristics).