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Tardigrades have a short plump body with four pairs of hollow unjointed legs. Most range from 0.1 to 0.5 mm (0.004 to 0.02 in) in length, although the largest species may reach 1.3 mm (0.051 in). The body cavity is a haemocoel, an open circulatory system, filled with a colourless fluid.
More than 700 species have been described. [2] The order Apochela consists of only one family, Milnesiidae, with two genera: Milnesium and Limmenius. Milnesium tardigradum can be found worldwide and is one of the biggest species among tardigrades (up to 1.4 mm); similar-looking species have been found in Cretaceous amber. [1]
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]
In 1964, R.M. May and colleagues proposed that the tardigrade Macrobiotus areolatus would be a suitable model organism for space experiments because of its exceptional radiation tolerance. [2] [4] In 2001, R. Bertolani and colleagues proposed tardigrades as a model for a study of animal survival in space.
Pages in category "Tardigrades" The following 11 pages are in this category, out of 11 total. This list may not reflect recent changes. ...
Milnesium tardigradum is a cosmopolitan species of tardigrade that can be found in a diverse range of environments. [1] It has also been found in the sea around Antarctica . [ 2 ] M. tardigradum was described by Louis Michel François Doyère in 1840.
The list of tardigrades of South Africa is a list of species that form a part of the phylum Tardigrada of the fauna of South Africa. The list follows the SANBI listing. Tardigrades (/ ˈ t ɑːr d ɪ ɡ r eɪ d z / ⓘ), known colloquially as water bears or moss piglets, are a phylum of eight-legged segmented micro-animals.
Parachela is an order of tardigrades in the class Eutardigrada. Members of this order have existed for at least 72 million years, up to the present. The oldest known species are Beorn leggi and Aerobius dactylus. [2] [3]