Assertion: horseshoe crab's fossil record | /r/HasProperty | three named specimens
Facets:
value: scientifically
type: MANNER
value: from the cretaceous
type: TEMPORAL
Source sentences:
text: The only other fossil records of horseshoe crabs (Xiphosurida) from the dinosaur age of North America are of three scientifically named specimens from the Cretaceous, a period that lasted from 145 million to 66 million years ago, the researchers said in the study.