Sostantivo
The upper half of the theca of a thecate protist such as a diatom or dinoflagellate.
- Parole correlate
- Esempi
-
Altri esempi (1)
Cellariiform, the orifices nearly confined to the convex frontal and lateral surfaces; the basal surface with a strong median calcareous keel, almost concealed by a flat membranous epitheca, which covers the whole zoarium […]