Assertion: chordate | /r/HasProperty | conway morris
Facets:
Source sentences:
text: The chordate affinities of Emmonsaspis are rejected by the absence of notochord and any other features related to chordates (Conway Morris, 1993).
text: Until recently, the only known Cambrian Pikaia from the middle Cambrian Burgess Shale (Walcott, 1911), has been widely accepted as a chordate (Conway Morris and Whittington, 1979; Briggs et al., 1994).