Assertion: echinoderm's system | /r/HasProperty | based on pechenik
Facets:
value: as a separate class
type: MANNER
Source sentences:
text: The following taxonomic system is based on Wray (1999), Pechenik (2005), and Tudge (2000) for its organization into subphyla and the default recognition of the Class Concentricycloidea ("sea daisies") as a separate class.