Assertion: early eurypterid | /r/HasProperty | marine
Facets:
value: doubtless
type: DEGREE
Source sentences:
text: Clarke reiterates the opinion that "the few early eurypterids we know were doubtless marine, and the creatures gradually acquired the brackish-water habit of their climax, which seems to have eventually changed to a fresh-water life" (37, 280).
text: It is clear that Walcott allows this entrance of the sea into the Beltian lake only in order to account for the presence of the eurypterids and annelids and to conform to the prevailing opinion that the early eurypterids were marine organisms.