epitheca

Tanımlar (İngilizce)

1. isim The upper half of the theca of a thecate protist such as a diatom or dinoflagellate.

   “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 […]”