Assertion: dinoflagellate's flagellum | /r/CapableOf | lie in groove
Facets:
Source sentences:
text: One flagellum lies in a groove, the sulcus that runs between the thecal plates from the center of one side, to the posterior end of the cell.
text: The other flagellum is flattened and ribbonlike and lies in a groove, the cingulum, that encircles the cell, dividing it into its two primary regions.