Thecium vs Theca - What's the difference?

Theca is a related term of thecium.

is that thecium is the hymenium while theca is any external case or sheath.

(thecia)

(mycology, dated) The hymenium

*{{quote-book, 1952, Frederick Lyle Wynd, The Fungi, by=Ernst Albert Gäumann citation

, passage=The hymenium, or thecium , is generated endogenously within the hyphal layer.}}

(mycology, dated) The internal hyphal layers of an apothecium

{{der3, apothecium , epithecium , hypothecium , parathecium , perithecium , pseudothecium}}

* LIAS Glossary

(en-noun)

(biology) Any external case or sheath.

(botany) The pollen producing organ usually found in pairs and forming an anther.

(medicine) The twin layers of cells surrounding the basal lamina of an ovarian follicle

(microbiology, planktology) The membrane complex enveloping the cells of certain plankton including diatoms and dinoflagellates

(coral science) The calcareous wall of a corallite, the exoskeleton of a coral polyp

{{der3, thecal , thecate , thecoma , epitheca , ootheca , gnathotheca , hypotheca , spermatheca , theca externa , theca interna , theca folliculi}}

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