Operculum (disambiguation)

Operculum ( Latin for "lid", plural: opercula ) stands for a lid- or plate-like structure used to close openings in animals and plants:

in fish the gill cover

a lid-like structure in various living beings, see z. B. ghosts , tube worms or pitcher plants

in mammalian embryos, the overlap of the cervical sinus

the lid of the ascus (spore tube) in the case of tubular fungi

in eucalyptus the capsule of the flower bud (kalyptra)

for pollen grains, see pollen # apertures

in Bryophytina (moss) the cover of the sporangium

with capsule fruits the lid of the lid capsule (pyxidium)

in the case of capsule fruits, the lid of a pore capsule

in orchids the anther shield in the gynostemium (Columna)

in passionflower plants, inner appendages, frills on the flowers

with seeds or stone cores a small germ cover