Assertion: stylonurine eurypterid | /r/HasProperty | middle ordovician
Facets:
value: in age
type: OTHER
Source sentences:
text: The earliest known stylonurine eurypterid, Brachyopterus, is also Middle Ordovician in age.
text: The earliest known stylonurine eurypterid, Brachyopterus, is also Middle Ordovician in age.