Assertion: irregular sea urchin | /r/HasProperty | atelostomata
Facets:
Source sentences:
text: The "irregular" sea urchins are an infra-class inside the Euechinoidea, called Irregularia, and include Atelostomata and Neognathostomata.
text: The "irregular" sea urchins are an infra-class inside the Euechinoidea, called Irregularia, and include Atelostomata and Neognathostomata.