epitheca — Từ điển tiếng Anh

Danh từ

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

   Từ liên quan

   Frustule

   Ví dụ

   Thêm ví dụ (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 […]