calyptra

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English[edit]

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)

Etymology[edit]

From Ancient Greek καλύπτον (kalúpton, covering or veiling).

Noun[edit]

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[edit]

References[edit]

  1. 1.0 1.1 1.2 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 [1]