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Heterotardigrada
Heterotardigrades (class Heterotardigrada) is a class of the tardigrades (water bears) that have cephalic appendages and legs with four separate but similar digits or claws on each. 444 species have been described. Anatomy The anatomy of the reproductive system is an important defining feature in distinguishing the different groups of tardigrades. Heterotardigrades have gonoducts that open to the outside through a preanal gonopore, rather than opening into the rectum as in the Eutardigrada Eutardigrada are a class of tardigrades (Tardigrada) without lateral appendages. Primarily freshwater bound, some species have secondarily gained the ability to live in marine environments ('' Halobiotus''). By cryptobiosis many species are able .... Ecology Some orders of heterotardigrades are marine, others are terrestrial, but as for all tardigrades, all are aquatic in the sense that they must be surrounded by at least a film of moisture in order to be active – though they can s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tardigrade
Tardigrades (), known colloquially as water bears or moss piglets, 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 . In 1776, the Italian biologist Lazzaro Spallanzani named them Tardigrada, which means 'slow walkers'. They live in diverse regions of Earth's biospheremountaintops, the deep sea, tropical rainforests, and the Antarctic. Tardigrades are among the most resilient animals known, with individual species able to survive extreme conditions – such as exposure to extreme temperatures, extreme pressures (both high and low), air deprivation, radiation, dehydration, and starvation – that would quickly kill most other forms of life. Tardigrades have survived exposure to outer space. There are about 1,500 known species in the phylum Tardigrada, a part of the superphylum Ecdysozoa. The earliest known fossil is from the Cambrian, some 500 million years ago ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Heterotardigrada
Heterotardigrades (class Heterotardigrada) is a class of the tardigrades (water bears) that have cephalic appendages and legs with four separate but similar digits or claws on each. 444 species have been described. Anatomy The anatomy of the reproductive system is an important defining feature in distinguishing the different groups of tardigrades. Heterotardigrades have gonoducts that open to the outside through a preanal gonopore, rather than opening into the rectum as in the Eutardigrada Eutardigrada are a class of tardigrades (Tardigrada) without lateral appendages. Primarily freshwater bound, some species have secondarily gained the ability to live in marine environments ('' Halobiotus''). By cryptobiosis many species are able .... Ecology Some orders of heterotardigrades are marine, others are terrestrial, but as for all tardigrades, all are aquatic in the sense that they must be surrounded by at least a film of moisture in order to be active – though they can s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Arthrotardigrada
Arthrotardigrada are an order of tardigrades, first described by Ernst Marcus in 1927. In 2018, a report integrating multiple morphological and molecular studies concluded that the Arthrotardigrada appear to be paraphyletic. Families Arthrotardigrada consists of the following families Family (from ) is a group of people related either by consanguinity (by recognized birth) or affinity (by marriage or other relationship). It forms the basis for social order. Ideally, families offer predictability, structure, and safety as ...: * Anisonychidae * Archechiniscidae * Batillipedidae * Coronarctidae * Halechiniscidae * Neoarctidae * Neostygarctidae * Renaudarctidae * Stygarctidae * Styraconyxidae * Tanarctidae References External links * {{Taxonbar, from=Q4129904 Ecdysozoa orders ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Neostygarctidae
''Neostygarctus'' is a genus of tardigrade Tardigrades (), known colloquially as water bears or moss piglets, 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 . In 1776, th ...s. It is the only genus in the family Neostygarctidae. It was named and described by Grimaldi de Zio, D'Addabbo Gallo and Morone De Lucia in 1982. Species The genus includes three species: * ''Neostygarctus acanthophorus'' Grimaldi de Zio, D'Addabbo Gallo & Morone De Lucia, 1982 * ''Neostygarctus lovedeluxe'' Fujimoto & Miyazaki, 2013, named after a Stand from '' JoJo's Bizarre Adventure'' that was in turn named after an album by Sade; the discoverers said that the "hairy appearance of the new species appears as if affected by the power of 'Love Deluxe'". * ''Neostygarctus oceanopolis'' Kristensen, Sørensen, Hansen & Zeppilli, 2015 References Further reading *Grimaldi de Zio, D'Ad ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Coronarctidae
The Coronarctidae are a family of tardigrade Tardigrades (), known colloquially as water bears or moss piglets, 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 . In 1776, th ...s. The family was first described by Jeanne Renaud-Mornant in 1974. Genera The family consists of two genera, '' Coronarctus'' and '' Trogloarctus''. References Further reading *Renaud-Mornant, 1974 : ''Une nouvelle famille de Tardigrades marins abyssaux: les Coronarctidae fam. nov. (Heterotardigrada).'' Series D, Natural Science, vol. 278, no 24, p. 3087-3090. Tardigrade families {{Tardigrade-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Neoarctidae
''Neoarctus primigenius'' is a species of tardigrade. It is the only species in the genus ''Neoarctus'', which is the only genus in the family Neoarctidae. The genus and species were first described and named by Grimaldi de Zio, D'Addabbo Gallo and Morone De Lucia in 1992. The authors first placed the genus in the family Stygarctidae, but it was moved to a separate family in 1998.Bello & Grimaldi de Zio (1998), ''Phylogeny of the genera of the Stygarctidae and related families (Tardigrada: Heterotardigrada).'' Zoologischer Anzeiger, vol. 237, p. 171-183. Description The female holotype is 99 μm long and 36 μm wide. Distribution The species has been found at 38 metres depth on the east coast of the island of Sardinia, in the Gulf of Orosei which is part of the Tyrrhenian Sea The Tyrrhenian Sea (, ; or ) , , , , is part of the Mediterranean Sea off the western coast of Italy. It is named for the Tyrrhenians, Tyrrhenian people identified with the Etruscans of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Renaudarctidae
''Renaudarctidae'' are a family of tardigrade Tardigrades (), known colloquially as water bears or moss piglets, 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 . In 1776, th ...s. It was first described in 1984 by Reinhardt Kristensen and Robert P. Higgins, and named after biologist Jeanne Renaud-Mornant. Genera The genus includes the following species: * '' Nodarctus'' Fujimoto & Yamasaki, 2017 * '' Renaudarctus'' Kristensen & Higgins, 1984 References Further reading *Kristensen & Higgins, 1984 : ''A new family of Arthrotardigrada (Tardigrada: Heterotardigrada) from the Atlantic coast of Florida, U.S.A''. Transactions of the American Microscopical Society, vol. 103, no. 3, p. 295-311. Nomenclator Zoologicus info Arthrotardigrada Tardigrade families {{tardigrade-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Stygarctidae
The Stygarctidae are a family of tardigrades. The family was first described by Schulz in 1951. The genus '' Neoarctus'' was first placed in the family Stygarctidae, but it was moved to a separate family, Neoarctidae ''Neoarctus primigenius'' is a species of tardigrade. It is the only species in the genus ''Neoarctus'', which is the only genus in the family Neoarctidae. The genus and species were first described and named by Grimaldi de Zio, D'Addabbo Gallo ..., in 1998.Bello & Grimaldi de Zio (1998), ''Phylogeny of the genera of the Stygarctidae and related families (Tardigrada: Heterotardigrada).'' Zoologischer Anzeiger, vol. 237, p. 171-183. Subfamilies and genera They are divided into the following subfamilies and genera: *Megastygarctidinae Bello & de Zio Grimaldi, 1998: **'' Megastygarctides'' McKirdy, Schmidt & McGinty-Bayly, 1976 *Stygarctinae Schulz, 1951: **'' Faroestygarctus'' Hansen, Kristensen & Jørgensen, 2012 **'' Mesostygarctus'' Renaud-Mornant, 1979 **'' Par ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tanarctidae
The Tanarctidae are a family of tardigrade Tardigrades (), known colloquially as water bears or moss piglets, 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 . In 1776, th ...s. The family was named and described by Reinhardt Møbjerg Kristensen and Jeanne Renaud-Mornant in 1980. Genera There are three genera: * '' Actinarctus'' Schulz, 1935 * '' Tanarctus'' Renaud-Debyser, 1959 * '' Zioella'' Renaud-Mornant, 1987 References Further reading *Renaud-Mornant, (1980), ''Description de trois espèces nouvelles du genre Tanarctus Renaud-Debyser'', 1959, et création de la sous-famille des Tanarctinae, subfam. nov. (Tardigrada, Heterotardigrada).' (''Description of Three New Species of the Genus Tanarctus'') Bulletin of the National Natural History Museum (Bulletin du Museum National d'Histoire Naturelle), Section A: Zoology, Biology and Animal, vol. 2, no 1, p.& ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Echiniscoidea
Echiniscoidea is an order of tardigrades, a phylum of water-dwelling, eight-legged, segmented micro-animals. It was first described by Richters in 1926.Echiniscoidea World Register of Marine Species
The World Register of Marine Species (WoRMS) is a taxonomic database that aims to provide an authoritative and comprehensive catalogue and list of names of marine organisms.
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Families The order Echiniscoidea consists of the following families:References |
Phase-contrast Microscopy
__NOTOC__ Phase-contrast microscopy (PCM) is an optical microscopy technique that converts phase shifts in light passing through a transparent specimen to brightness changes in the image. Phase shifts themselves are invisible, but become visible when shown as brightness variations. When light waves travel through a medium other than a vacuum, interaction with the medium causes the wave amplitude and phase to change in a manner dependent on properties of the medium. Changes in amplitude (brightness) arise from the scattering and absorption of light, which is often wavelength-dependent and may give rise to colors. Photographic equipment and the human eye are only sensitive to amplitude variations. Without special arrangements, phase changes are therefore invisible. Yet, phase changes often convey important information. Phase-contrast microscopy is particularly important in biology. It reveals many cellular structures that are invisible with a bright-field microscope, as exem ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Echiniscoididae
The Echiniscoididae are a family of tardigrades, water-dwelling, eight-legged, segmented micro-animals. It is one of the four families in the Echiniscoidea order.Echiniscoididae World Register of Marine Species
The World Register of Marine Species (WoRMS) is a taxonomic database that aims to provide an authoritative and comprehensive catalogue and list of names of marine organisms.
Content
The content of the registry is edited and maintained by scien ...
The family of Echiniscoididae consists of the following subfamilies and genera: [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
