Assertion: early echinoderm | /r/HasAspect | tail
Facets:
Source sentences:
text: Some scientists have even discussed placing Phylum Echinodermata closer to Phylum Chordata, or even within Phylum Chordata, due to the discovery of some early echinoderms that might have possessed pharyngeal slits and a tail (diagnostic chordate features that are discussed in the next tutorial).