English

Ripening moss sporophyte shedding its calyptra

Bud of a flower of a grape shedding its calyptra

Calyptrae splitting off the opening buds of Eucalyptus ficifolia

Calyptra(1) over a fly's haltere(3)

Noun

calyptra ‎(plural calyptras or calyptrae)

1. (botany) In bryophytes, a thin, hood of tissue that forms from the archegonium and covers the developing sporophyte and is shed as it ripens.^[1]
   • 1992, Rudolf M. Schuster, The Hepaticae and Anthocerotae of North America: East of the Hundredth Meridian, volume V, page 4

     (b) sporophyte with foot reduced, the entire sporophyte enveloped by the calyptra, which is ± stipitate at the base.

2. (botany) any cap-like covering of a flower or fruit, such as the operculum over the unopened buds of Eucalyptus flowers^[1]
3. (botany) Any of various coverings at the tips of structures, in the terminology of various authors; for example rootcaps and the apical cells of trichomes.^[1]
4. (entomology) In flies such as the housefly, Musca, in the taxonomic order Diptera, zoological section Schizophora, subsection Calyptrata, the calyptra is a membranous rearward extension of the forewing; it covers the haltere.^[2]

Translations

References

1. 1 2 3 Jackson, Benjamin, Daydon; A Glossary of Botanic Terms with their Derivation and Accent; Published by Gerald Duckworth & Co. London, 4th ed 1928
2. ↑ C. R, Osten Sacken. Notice on the terms: Tegula, antitegula, squama and alula, as used in Dipterology