Assertion: gastropod | /r/HasProperty | varied group
Facets:
value: by the ordovician period
type: TEMPORAL
Source sentences:
text: By the Ordovician period the gastropods were a varied group present in a few aquatic habitats.
text: By the Ordovician period the gastropods were a varied group present in a range of aquatic habitats.
text: By the Ordovician period the gastropods were a varied group present in a few aquatic habitats.