Calyptra (moth) - Wikipedia
The genus Calyptra is a group of moths in subfamily Calpinae of the family Erebidae. They are a member of the Calpini tribe , whose precise circumscription is uncertain but which includes a number of other fruit-piercing or eye-frequenting genera currently classified in Calpinae.
Operculum (botany) - Wikipedia
In botany, an operculum (pl.: opercula) or calyptra (from Ancient Greek καλύπτρα (kalúptra) 'veil') is a cap-like structure in some flowering plants, mosses, and fungi. It is a covering, hood or lid, describing a feature in plant morphology.
Calyptra | plant structure | Britannica
calyptra. plant structure. Learn about this topic in these articles: structure and function in bryophytes. …a protective structure, called the calyptra, that sheathes the growing embryo.
Calyptra Definition & Meaning - Merriam-Webster
The meaning of CALYPTRA is a hoodlike structure in a plant; especially : haploid tissue forming a membranous hood over the capsule in a moss.
Vampire Moths Suck the Blood of Vertebrates, Including Humans
2015年10月30日 · Vampire Moths Suck the Blood of Vertebrates, Including Humans. A vampire moth, Calyptra thalictri, feeding on Dr. Jennifer M. Zaspel’s thumb. By Kevin Fitzgerald. Vampirism — piercing or cutting animal skin to suck or lap up blood — is known throughout the animal kingdom.
5.3: Mosses - Biology LibreTexts
Moss sporophytes have a complex set of structures at the top of a seta. When the sporophyte emerges, it tears off a piece of the female gametophyte's archegonium, leaving a coating called the calyptra. Mosses have a capsule, where the sporangia are housed.
What is root cap? - Definition - CK-12 Foundation
The root cap is a type of tissue at the tip of a plant root. It is also known as calyptra. Root caps have several functions: They protect the growing tip in plants. They secrete mucilage to ease the movement of the root through soil.
Calyptra - Encyclopedia.com
calyptra 1. A layer of cells that covers the developing sporophyte of mosses, liverworts, clubmosses, horsetails, and ferns. In mosses it forms a hood over the capsule and in liverworts it forms a sheath at the base of the capsule stalk. 2. See root cap.
Calyptra - an overview | ScienceDirect Topics
The calyptra is constituted by living cells of parenchymatic nature, with a strong mechanical consistency to be able to separate hard particles from the ground. As the initial cells produce new cells, the older ones are progressively displaced toward the end.
CALYPTRA Definition & Meaning - Dictionary.com
calyptra. / kə-lĭp ′ trə /. In some bryophyte plants, a structure that covers the young sporophyte as it develops within the tissues of its gametophyte parent. The calyptra, which consists of a …