Assertion: echinoderm's larva | /r/HasProperty | ancestral larval type
Facets:
value: for echinoderms
type: TRANSITIVE-OBJECT
Source sentences:
text: The planktotrophic larva is considered to be the ancestral larval type for echinoderms but after 500 million years of larval evolution, about 68% of species whose development is known have a lecithotrophic larval type.