Polyextremophiles

thumb|A tree covered with leafy foliose lichens and shrubby fruticose lichens

Tardigrades (), also known 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'.

radioresistant extremophile species of bacterium

order of tardigrades

Deinococcus (from Ancient Greek δεινός (deinós), meaning "dreadful", and κόκκος (kókkos), meaning "grain") is in the formerly monotypic family Deinococcaceae, and one genus of three in the order Deinococcales of the bacterial phylum Deinococcota highly resistant to environmental hazards. These bacteria have thick cell walls that give them Gram-positive stains, but they also include a second membrane and are therefore closer in structure to Gram-negative bacteria. Deinococcus survive when their DNA is exposed to high doses of gamma and UV radiation. Whereas other bacteria change their structure

The Hypsibiidae are a family of water bears or moss piglets, tardigrades in the class Eutardigrada.

Eohypsibiidae is a family of water bear or moss piglet, tardigrades in the class Eutardigrada. It contains the following species in three genera:

Microhypsibiidae is a family of tardigrades in the class Eutardigrada. It contains the following species in two genera: Fractonotus Fractonotus caelatus (Marcus 1928) Microhypsibius Microhypsibius bertolanii Kristensen, 1982 Microhypsibius japonicus Ito, 1991 Microhypsibius minimus Kristensen, 1982 Microhypsibius truncatus Thulin, 1928

Deinococcota (synonym, "Deinococcus-Thermus") is a phylum of bacteria with a single class, Deinococci (from Ancient Greek δεινός (deinós), meaning "terrible", and κόκκος (kókkos), meaning "berry"), that are highly resistant to environmental hazards, also known as extremophiles.

Hypsibius is a genus of tardigrades in the class Eutardigrada.

A thermoacidophile is an extremophilic microorganism that is both thermophilic and acidophilic; i.e., it can grow under conditions of high temperature and low pH. The large majority of thermoacidophiles are archaea (particularly the Thermoproteota and "Euryarchaeota") or bacteria, though occasional eukaryotic examples have been reported. Thermoacidophiles can be found in hot springs and solfataric environments, within deep sea vents, or in other environments of geothermal activity. They also occur in polluted environments, such as in acid mine drainage. thumb|400x400px|Hot Spring in Yellowston

Mesocrista is a genus of water bear or moss piglet, a tardigrade in the class Eutardigrada.

Doryphoribius is a genus of water bear or moss piglet, a tardigrade in the class Eutardigrada.

Astatumen is a genus of tardigrades in the class Eutardigrada found in Romania. Species of this genus were originally categorized in the genus Itaquascon until 1997.

Parascon is a genus of water bear or moss piglet, a tardigrade in the class Eutardigrada.

Platicrista is a genus of tardigrade in the class Eutardigrada.

The Thermoproteota are archaea that have been classified as a phylum of the domain Archaea. Initially, the Thermoproteota were thought to be sulfur-dependent extremophiles but recent studies have identified characteristic Thermoproteota environmental rRNA indicating the organisms may be the most abundant archaea in the marine environment. Originally, they were separated from the other archaea based on rRNA sequences; other physiological features, such as lack of histones, have supported this division, although some crenarchaea were found to have histones. Until 2005 all cultured Thermoproteota

Hebesuncus is a genus of water bear or moss piglet, a tardigrade in the class Eutardigrada.

Mixibius is a genus of water bear or moss piglet, a tardigrade in the class Eutardigrada.

species of waterbears

Diphascon is a genus of water bear or moss piglet, a tardigrade in the class Eutardigrada.

Thulinius is a genus of water bear or moss piglet, a tardigrade in the class Eutardigrada.

Necopinatidae is a family of water bears or moss piglets, tardigrades in the class Eutardigrada. It contains the following species in two genera Apodibius Apodibius confusus Dastych, 1983 Apodibius nuntius Binda, 1986 Apodibius richardi Vargha, 1995 Apodibius serventyi Morgan & Nicholls 1986 Necopinatum Necopinatum mirabile Pilato, 1971

Isohypsibius is a genus of water bear or moss piglet, a tardigrade in the class Eutardigrada. The length of an isohypsibius tardigrade ranges from 0.1 millimeters to 1.5 millimeters. In addition to eating algae and plant cells, tardigrades also consume insect larvae and even other tardigrades. They live in a lot of places, like damp wooded areas with moss, lichens, leaf litter, and dirt. These animals can also be found in natural lakes and ponds.

Itaquascon is a genus of tardigrade in the class Eutardigrada.

Halobiotus is a genus of tardigrade in the class Eutardigrada.