| Arthrotardigrada | |
|---|---|
 | |
| Florarctus sp. | |
Scientific classification  | |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Tardigrada |
| Class: | Heterotardigrada |
| Order: | Arthrotardigrada Marcus, 1927 |
| Families | |
See text | |
Arthrotardigrada are an order of tardigrades, [1] [2] first described by Marcus in 1927.
Heterotardigrades (Heterotardigrada) is a class that includes tardigrades that have cephalic appendages and legs with four separate but similar digits or claws on each. 444 species have been described.
Reinhardt Møbjerg Kristensen is a Danish invertebrate biologist, noted for the discovery of three new phyla of microscopic animals: the Loricifera in 1983, the Cycliophora in 1995, and the Micrognathozoa in 2000. He is also considered one of the world's leading experts on tardigrades. His recent field of work revolves mostly around arctic biology.
28S ribosomal RNA is the structural ribosomal RNA (rRNA) for the large subunit (LSU) of eukaryotic cytoplasmic ribosomes, and thus one of the basic components of all eukaryotic cells. It has a size of 25S in plants and 28S in mammals, hence the alias of 25S–28S rRNA.
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 Kleiner Wasserbär. In 1777, the Italian biologist Lazzaro Spallanzani named them Tardigrada, which means "slow steppers".
Echiniscus testudo is a cosmopolitan species of tardigrade.
Echiniscoidea is an order of tardigrades, a phylum of water-dwelling, eight-legged, segmented micro-animals. It was first described by Richters in 1926.
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.
Renaudarctus is a genus of tardigrades in the family Renaudarctidae. The genus was first described by Reinhardt Kristensen and Robert P. Higgins in 1984, and named after biologist Jeanne Renaud-Mornant.
Renaudarctidae are a family of tardigrades. It was first described in 1984 by Reinhardt Kristensen and Robert P. Higgins, and named after biologist Jeanne Renaud-Mornant.
The Tanarctidae are a family of tardigrades. The family was named and described by Reinhardt Møbjerg Kristensen and Jeanne Renaud-Mornant in 1980.
Hypechiniscus is a genus of tardigrades in the family Echiniscidae. It was named and described by Gustav Thulin in 1928.
Neostygarctus is a genus of tardigrades. 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.
Faeroestygarctus dezioae is a species of armoured marine tardigrades. It is the only species of Faroestygarctus, a genus of the family Stygarctidae.
Proechiniscus hanneae is a species of tardigrade. It is the only species of Proechiniscus, a genus within the family Echiniscidae.
Novechiniscus armadilloides is a species of terrestrial tardigrade. It is the only species of the genus Novechiniscus, which belongs to the family Echiniscidae. The species is endemic to the United States in the state of Utah.
Wingstrandarctus is a genus of tardigrades, in the subfamily Florarctinae which is part of the family Halechiniscidae. The genus was named and described by Kristensen in 1984.
Tanarctus is a genus of tardigrades in the family Tanarctidae, named and described by Jeanne Renaud-Debyser in 1959.
Raiarctus is a genus of tardigrades in the family Styraconyxidae. The genus was named and first described by Jeanne Renaud-Mornant in 1981.
Tholoarctus is a genus of tardigrades in the family Styraconyxidae. The genus was named and first described by Kristensen and Renaud-Mornant in 1983.
Bertolanius is a genus of tardigrades belonging to the family Eohypsibiidae.
The class Heterotardigrada includes two orders: Arthrotardigrada and Echiniscoidea. The Arthrotardigrada includes only marine species, that very often have also a medial cirrus in the head; legs may be digitate or not. In non-digitate legs ...
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