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Tardigrades (/ ˈ t ɑːr d ɪ ɡ r eɪ d z / ⓘ), [1] known colloquially as water bears or moss piglets, [2] are a phylum of eight-legged segmented micro-animals. They were first described by the German zoologist Johann August Ephraim Goeze in 1773, who called them Kleiner Wasserbär ' little water bear ' .
Tardigrades are affectionately known as water bears or moss piglets and are tiny invertebrates measuring a maximum of 0.05 inches in length. Viewed through a microscope, they look a little like a ...
Tardigrades, which are eight-legged micro-animals, are commonly referred to as water bears or moss piglets and are found all over the world in varying extreme habitats. First discovered in 1904 and originally named Hypsibius antarcticus, Acutuncus antarcticus is the most abundant tardigrade species in Antarctica. [1]
A second hypothesis, the water replacement hypothesis, posits that CAHS proteins replace water in other desiccation-sensitive proteins, protecting the hydrogen bonds normally reliant on water. [11] CAHS proteins are dispersed throughout the cell in normal conditions, but form a network of filaments during environmentally stressful conditions.
The tardigrade, or water bear, can undergo all five types of cryptobiosis. While in a cryptobiotic state, its metabolism reduces to less than 0.01% of what is normal, and its water content can drop to 1% of normal. [21] It can withstand extreme temperature, radiation, and pressure while in a cryptobiotic state. [22]
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The Hypsibiidae are a family of water bears or moss piglets, tardigrades in the class Eutardigrada. [1] [2] [3] Subfamilies and genera. Subfamily Diphasconinae.
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