Assertion: sponge's spicule | /r/HasProperty | cambrian
Facets:
value: in age
type: OTHER
Source sentences:
text: (2019) likewise stated that “the oldest spicules are Cambrian in age,” but hypothesized based on a new Cambrian fossil that potential Ediacaran sponges might have lacked biomineralized spicules (also see Tang 2019).