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Domain of organisms
Archaea (/ɑːrˈkiːə/ ar-KEE-ə) is a domain of organisms. Traditionally, Archaea included only its prokaryotic members, but has since been found to be paraphyletic
Archaea
Taxonomic rank
of either three domains, Archaea, Bacteria, and Eukarya, or two domains, Archaea and Bacteria, with Eukarya included in Archaea. In the three-domain model
Domain_(taxonomy)
Topics referred to by the same term
Archaea is a domain of single-celled organisms. Archaea or archea may also refer to: Archaea (spider), an extinct genus of Archaeidae Archaea (journal)
Archaea_(disambiguation)
Hypothesis for classification of life
classification system that groups all cellular life into three domains, namely Archaea, Bacteria and Eukarya, introduced by Carl Woese, Otto Kandler and Mark
Three-domain_system
Kingdom of archaea
archaea, or Promethearchaeati (previously known as superphylum "Asgard" or phylum "Asgardarchaeota"), are a kingdom belonging to the domain Archaea that
Asgard_archaea
Unicellular organism lacking a membrane-bound nucleus
phylogenetics, prokaryotes are divided into two domains: Bacteria and Archaea. A third domain, Eukaryota, consists of organisms with cell nuclei. Prokaryotes
Prokaryote
Extinct genus of spiders
Archaea is an extinct genus of spiders in the family Archaeidae. As of October 2016[update], four species are placed (or possibly placed) in the genus
Archaea_(spider)
Taxonomic rank
have used a system of six kingdoms (Animalia, Plantae, Fungi, Protista, Archaea or Archaebacteria, and Bacteria or Eubacteria), while textbooks in other
Kingdom_(taxonomy)
2000 book by John L. Howland
The Surprising Archaea: Discovering Another Domain of Life is a popular science book written about the domain Archaea. It was written by John L. Howland
The_Surprising_Archaea
Biological classification system
two domains: Archaea, which includes eukaryotes in this classification, and Bacteria. It emerged from development of knowledge of archaea diversity and
Two-domain_system
Domain of life whose cells have nuclei
life forms alongside the two groups of prokaryotes: the Bacteria and the Archaea. Eukaryotes represent a small minority of the number of organisms, but
Eukaryote
Ancestor of all current life on Earth
subsequent life forms descend under the three-domain system of Bacteria, Archaea, and Eukarya. Most studies suggest that the LUCA existed by 3.5 billion
Last universal common ancestor
Last_universal_common_ancestor
Domain of microorganisms
common ancestor. These evolutionary domains are called Bacteria and Archaea. Unlike Archaea, bacteria contain ester-linked lipids in the cell membrane, possess
Bacteria
Basic unit of life forms
prokaryotes and eukaryotes. Prokaryotes are single-celled and include archaea and bacteria. Eukaryotes can be single-celled or multicellular. Single-celled
Cell_(biology)
Microscopic living organism
unicellular organisms in all three domains of life: two of the three domains, Archaea and Bacteria, only contain microorganisms. The third domain, Eukaryota
Microorganism
This article discusses the Unique properties of hyperthermophilic archaea. Hyperthermophiles are organisms that can live at temperatures ranging between
Unique properties of hyperthermophilic archaea
Unique_properties_of_hyperthermophilic_archaea
Organism that consists of only one cell
Most prokaryotes are unicellular and are classified into bacteria and archaea. Many eukaryotes are multicellular, but some are unicellular such as protozoa
Unicellular_organism
This article lists the genera of the Archaea and also shows taxa of archaea that do not contain genera. The currently accepted taxonomy is based on the
List_of_Archaea_genera
Taxonomic clade
of the two domains Archaea and Eukaryota, coined by Thomas Cavalier-Smith in 2002. Its name reflects the hypothesis that both archaea and eukaryotes evolved
Neomura
mitochondrion arose as an endosymbiont within a prokaryotic host in the archaea, giving rise to a symbiotic association of two cells from which the first
Hydrogen_hypothesis
Marine bacteria and marine archaea
Cell wall Capsule Pili Marine prokaryotes are marine bacteria and marine archaea. They are defined by their habitat as prokaryotes that live in marine environments
Marine_prokaryotes
microbial mat that is found in subsoil and made up of fungi, bacteria, archaea, myxomycetes and their metabolic products. They appear like jelly and have
Taisui_(biological_object)
Family of spiders
Malkaridae, and Anapidae. Currently valid Baltic species include Archaea levigata and Archaea paradoxa. In 2003, Afrarchaea grimaldii was described from Cretaceous
Archaeidae
Hollow structures which resemble tubes
has multiple cannula connections in a dense form. Hamus (archaea) Pilus Biofilm "7: Archaea". Biology LibreTexts. 2018-02-06. Retrieved 2023-03-13. Ng
Cannula_(archaea)
Type of microorganism that produces methane as a waste product
Methanogens are anaerobic archaea that produce methane as a byproduct of their energy metabolism, i.e., catabolism. Methane production, or methanogenesis
Methanogen
Species of gastropod
Orania archaea is a species of sea snail, a marine gastropod mollusk in the family Muricidae, the murex snails or rock snails. Subspecies Orania archaea archaea
Orania_archaea
Overview of and topical guide to life forms
life forms. No form of extraterrestrial life has yet been discovered. Archaea – a domain of single-celled microrganisms, morphologically similar to bacteria
Outline_of_life_forms
Biological kingdom
chemosynthesis (via oxidising inorganic compounds such as hydrogen sulfide) by archaea and bacteria. Animals originated in the ocean; all extant animal phyla
Animal
Manual for identifying prokaryotic organisms
more empirical in recent years. The Taxonomic Outline of Bacteria and Archaea is a derived publication indexing taxon names from version two of the manual
Bergey's Manual of Systematic Bacteriology
Bergey's_Manual_of_Systematic_Bacteriology
Class of salt-tolerant archaea
Haloarchaea (halophilic archaea, halophilic archaebacteria, halobacteria) are a class of archaea under the phylum Euryarchaeota, found in water saturated
Haloarchaea
Genus of ultra-small archaea
Microcaldus is a monotypic genus of ultra-small archaea. It contains one species, Microcaldus variisymbioticus. It is in the monotypic family Microcaldaceae
Microcaldus
Biological kingdom of archaea
Nanobdellati (syn. "DPANN") is a kingdom of archaea first proposed in 2013. Many members show novel signs of horizontal gene transfer from other domains
Nanobdellati
Chemical element with atomic number 74 (W)
known to occur in biomolecules, found in a few species of bacteria and archaea. However, tungsten interferes with molybdenum and copper metabolism and
Tungsten
Archaeal appendage
Archaea, one of the three domains of life, are a highly diverse group of prokaryotes that include a number of extremophiles. One of these extremophiles
Hamus_(archaea)
Phylum of bacteria
up the most basal clade of all bacteria. The archaea of the Nanobdellati kingdom are ultra-small archaea that share the same characteristics with these
Nomurabacteria
Chemical compound
ester of glycerol. It is a component of ether lipids, which are common for archaea. Glycerol 1-phosphate is synthesized by reducing dihydroxyacetone phosphate
Glycerol_1-phosphate
Biological process
prokaryotes, unicellular organisms without cell nuclei, such as bacteria and archaea. However, some processes in bacteria, including bacterial conjugation,
Sexual_reproduction
Life arising from non-living matter
approach has sought to characterize LUCA by identifying the genes shared by Archaea and Bacteria, major branches of life. It appears there are 60 proteins
Abiogenesis
Historically, a biological kingdom
organisms found in kingdom Monera have been divided into two domains, Archaea and Bacteria (with Eukarya as the third domain). Furthermore, the taxon
Monera
External body part or natural prolongation
are cutaneous appendages. Protrusions from single-celled bacteria and archaea are known as cell-surface appendages or surface appendages. In many kinds
Appendage
Species of moth
Arogalea archaea is a moth of the family Gelechiidae. It is found in Mexico (Guerrero). The wingspan is about 13 mm. The forewings are white, profusely
Arogalea_archaea
Organism that thrives in extremely hot environments from 60°C upward
often above 80 °C (176 °F). Hyperthermophiles are often within the domain Archaea, although few bacterial examples exist. Some of them are able to live at
Hyperthermophile
Organisms that live in salt water
history. The earliest known life forms evolved as anaerobic prokaryotes (archaea and bacteria) in the Archean oceans around the deep sea hydrothermal vents
Marine_life
Pink lake phenomenon and examples
as Dunaliella salina, usually in conjunction with specific bacteria and archaea, which may vary from lake to lake. The most common archaeon is Halobacterium
Pink_lake
Genus of Asgard archaea
"Candidatus Hodarchaeum" is a monotypic genus of Promethearchaeati archaea. It contains the sole species "Ca. Hodarchaeum mangrovi". It is in the monotypic
Hodarchaeum
Phylum of archaea
The Thermoproteota are archaea that have been classified as a phylum of the domain Archaea. Initially, the Thermoproteota were thought to be sulfur-dependent
Thermoproteota
Matter with biological processes
functional unit of life. Smaller organisms, including prokaryotes (bacteria and archaea), consist of small single cells. Larger organisms, mainly eukaryotes, can
Life
Family of DNA sequences found in prokaryotic organisms
sequences found in the genomes of prokaryotic organisms such as bacteria and archaea. Each sequence within an individual prokaryotic CRISPR is derived from
CRISPR
Biological oxidation of ammonia/ammonium to nitrate
aerobic process performed by small groups of autotrophic bacteria and archaea. The process of nitrification begins with the first stage of ammonia oxidation
Nitrification
Series of interconnected biochemical reactions
reductase pathway is an essential metabolic pathway present in eukaryotes, archaea, and some bacteria. The pathway produces two five-carbon building blocks
Mevalonate_pathway
Pasteur Institute of Paris, and foremost authority on viruses infecting Archaea. David Prangishvili gained a Master of Science degree in 1971 at Tbilisi
David_Prangishvili
Order of Asgard archaea
"Wenzhongarchaeales" is an order of Asgard archaea that belongs to the class "Heimdallarchaeia". Zhang, Jiawei; Feng, Xiaoyuan; Li, Meng; Liu, Yang; Liu
Wenzhongarchaeales
American microbiologist (1928–2012)
American microbiologist and biophysicist. Woese is famous for defining the Archaea (a new domain of life) in 1977 through a pioneering phylogenetic taxonomy
Carl_Woese
Kingdom of archaea
"Euryarchaeota", from Ancient Greek εὐρύς eurús, "broad, wide") is a kingdom of archaea. Methanobacteriati are highly diverse and include methanogens, which produce
Methanobacteriati
Candidate phylum of thermoproteatian archaea
"Nezhaarchaeota" is a phylum of Thermoproteati archaea. Wang, Yinzhao; Wegener, Gunter; Hou, Jialin; Wang, Fengping; Xiao, Xiang (2019-03-04). "Expanding
Nezhaarchaeota
Scientific study of life
environmental science. Biologists classify organisms—from single-celled archaea and bacteria to multicellular plants, fungi, and animals—based on shared
Biology
Science of classifying organisms
One main characteristic of the three-domain method is the separation of Archaea and Bacteria, previously grouped into the single kingdom Bacteria (a kingdom
Taxonomy_(biology)
Any life form too small for the naked human eye to see that lives in a marine environment
diverse. They can be single-celled or multicellular and include bacteria, archaea, viruses, and most protozoa, as well as some fungi, algae, and animals
Marine_microorganisms
Hypothesis in evolutionary biology
prokaryotes called eocytes (later classified as Thermoproteota, a group of archaea). After his team at the University of California, Los Angeles discovered
Eocyte_hypothesis
Chemical compound
the membranes of archaea. The 2,3-sn-glycerol structure and ether bond linkage are two key differences between lipids found in archaea vs those of bacteria
Archaeol
Topics referred to by the same term
associated with the gods in Norse cosmology Asgard (Archaea), a proposed superphylum of the Archaea domain of organisms Asgard (comics), the fictional
Asgardian
Phylum of archaea
"Nanoarchaeota", Greek for "dwarf or tiny ancient one") is a phylum of Archaea. The first species discovered, Nanoarchaeum equitans, was from a submarine
Nanobdellota
Genus of archaeon
"Candidatus Sukunaarchaeum mirabile" (provisional name) is a species of archaea of which only the DNA is known, but which already presents several particularities:
Sukunaarchaeum
Genus of archaea
Haloarcula (common abbreviation Har.) is a genus of extreme halophilic Archaea in the class of Halobacteria. Haloarcula species can be distinguished from
Haloarcula
Enzyme that synthesizes RNA from DNA during Transcription
representing an independent lineage. The former is found in bacteria, archaea, and eukaryotes alike, sharing a similar core structure and mechanism.
RNA_polymerase
Kingdom of archaea
Thermoproteati is a kingdom of archaea. Its synonym, "TACK", is an acronym for "Thaumarchaeota" (now Nitrososphaerota), "Aigarchaeota", "Crenarchaeota
Thermoproteati
Infectious agent that replicates in cells
forms, from animals and plants to microorganisms, including bacteria and archaea. Viruses are found in almost every ecosystem on Earth and are the most
Virus
Genus of archaea
Promethearchaeum is a genus of archaea discovered from the deep-sea sediments of the Pacific Ocean at the coast of Japan. Described in 2020 as a single
Promethearchaeum
Subfield of genetics devoted to the study of microorganisms
different purposes. The microorganisms that are observed are bacteria and archaea. Some fungi and protozoa are also subjects used to study in this field
Microbial_genetics
American singer (born 1989)
show that Unicron shared with fellow Victoria-based metal band Fall in Archaea that LaPlante met their guitarist, Mike Stringer. The LaPlante siblings
Courtney_LaPlante
Structure on the cell surface of many archaea that allows for swimming motility
archaeal flagellum) is a unique structure on the cell surface of many archaea that allows for swimming motility. The archaellum consists of a rigid helical
Archaellum
Phylum of archaea
Methanobacteriota is a phylum in the domain Archaea. The phylum was introduced to prokaryotic nomenclature in 2023. "Phylum: Methanobacteriota". List
Methanobacteriota
Collaborative academic project
of 16S rRNA sequences of all validly published species of Bacteria and Archaea. At one stage, 23S sequences were also collected, but this has since stopped
'The All-Species Living Tree' Project
'The_All-Species_Living_Tree'_Project
Species of halotolerant archaea
Haloquadratum walsbyi is a species of Archaea in the genus Haloquadratum, known for its square shape and halophilic nature. First discovered in a brine
Haloquadratum_walsbyi
Chemical compound
Hypusine is an uncommon amino acid found in all eukaryotes and in some archaea, but not in bacteria. The only known proteins containing the hypusine residue
Hypusine
Organism that thrives at relatively high temperatures
temperatures, between 41 and 122 °C (106 and 252 °F). Many thermophiles are archaea, though some of them are bacteria and fungi. Thermophilic bacteria are
Thermophile
Type of organic compound
products, are organic compounds produced by any lifeform, e.g. bacteria, archaea, fungi, animals, or plants, which are not directly involved in the normal
Secondary_metabolite
Cellular appendage functioning as locomotive or sensory organelle
sensitive to wetness outside the cell. Across the three domains of Bacteria, Archaea, and Eukaryota, the flagellum has a different structure, protein composition
Flagellum
Species of Halobacteria
Haloferax volcanii is a species of archaean in the genus Haloferax in the Archaea. Haloferax volcanii is a halophilic mesophile archaeon that can be isolated
Haloferax_volcanii
Microbial community assemblage and activity
members forming the microbiome. Most microbiome researchers agree bacteria, archaea, fungi, algae, and small protists should be considered as members of the
Microbiome
Study of microscopic organisms (microbes)
classified as lacking membrane-bound organelles and include Bacteria and Archaea. Microbiologists traditionally relied on culture, staining, and microscopy
Microbiology
Family of cytochrome P450 enzymes
CYP147 is one of the only three P450 families shared in bacteria and archaea, the other two are CYP197 and CYP109. Ngcobo, PE; Nkosi, BVZ; Chen, W;
CYP147_family
Taxonomic rank
In biology, a phylum (/ˈfaɪləm/; pl.: phyla) is a level of classification, or taxonomic rank, that is below kingdom and above class. Traditionally, in
Phylum
Genus of archaea
Methanocorpusculum is a genus of Archaea within the family Methanocorpusculaceae. The species within Methanocorpusculum were first isolated from biodisgester
Methanocorpusculum
Currently uncultured deep-sea archaeal species
as Asgard archaea, a grouping of archaeal lineages possessing key eukaryotic proteins, suggesting that eukaryotes diverged from Asgard archaea. Lokiarchaeum
Lokiarchaeum_primum
Family of cytochrome P450 enzymes
CYP197 is one of the only three P450 families shared in bacteria and archaea, the other two are CYP147 and CYP109. Genes in this family are co-present
CYP197_family
Type of virus that infects the domain of unicellular, prokaryotic organisms or Archaea
An archaeal virus is a virus that infects and replicates in archaea, a domain of unicellular, prokaryotic organisms. Archaeal viruses, like their hosts
Archaeal_virus
Genus of archaea
Ignicoccus is a genus of hyperthermophillic Archaea living in marine hydrothermal vents. They were discovered in samples taken at the Kolbeinsey Ridge
Ignicoccus
Non-protein chemical compound or metallic ion
cofactors that evolved in methanogens, which are restricted to this group of archaea. Although enzyme catalyzed industrial processes are highly efficient, some
Cofactor_(biochemistry)
Phylum of archaea
Nitrososphaeria (previously phylum Nitrososphaerota or Thaumarchaeota) is a class of Archaea under the phylum Thermoproteota. The first species, Cenarchaeum symbiosum
Nitrososphaeria
Taxonomic rank above species and below family
(animals, plants, protists, algae, fungi), and prokaryotes (bacteria and archaea), is Latin and binomial in form; this contrasts with common or vernacular
Genus
Incredibly small, unique extremophile Archaea species found deep in an acidic mine
laboratory at the University of California Berkeley. These novel groups of archaea named ARMAN-1, ARMAN-2 (Candidatus Micrarchaeum acidiphilum ARMAN-2), and
Archaeal Richmond Mine acidophilic nanoorganisms
Archaeal_Richmond_Mine_acidophilic_nanoorganisms
Chemical compound
lipid membrane component, biphytane is widely used as a biomarker for archaea. In particular, given its association with sites of active anaerobic oxidation
Biphytane
Organisms that thrive under highly acidic conditions
including Archaea, Bacteria, and Eukarya. A list of these organisms includes: Sulfolobales, an order in the Thermoproteota branch of Archaea Thermoplasmatales
Acidophile
Mine in California, United States
sulfate minerals. The bacteria and archaea living in the mine such as Leptospirillum (bacteria) and Ferroplasma (archaea) are of interest because they can
Iron_Mountain_Mine
Class of archaea related to eukaryotes
Heimdallarchaeia (also known as "Candidatus Heimdallarchaeota") is a class of archaea within the phylum Asgardarchaeota. Heimdallarchaeia is considered the closest
Heimdallarchaeia
Genus of viruses
Captovirus is a genus of dsDNA viruses in the family Ungulaviridae. Archaea acidianus serve as natural hosts. There is only one species in this genus:
Captovirus
Family of cytochrome P450 enzymes
CYP109 is one of the only three P450 families shared in bacteria and archaea, the other two are CYP147 and CYP197. Genes in this family are co-present
CYP109_family
Candidatus genus of archaea
"Candidatus Heimdallarchaeum" is a genus of archaea that in turn forms a distinct group within the Promethearchaeati kingdom. Named after the mythical
Heimdallarchaeum
Shapes characteristic of certain bacteria and archaea
under a light microscope enables the classification of these bacteria (and archaea). Generally, the basic morphologies are spheres (coccus) and round-ended
Bacterial cellular morphologies
Bacterial_cellular_morphologies
ARCHAEA
ARCHAEA
ARCHAEA
ARCHAEA
Surname or Lastname
English (Yorkshire)
English (Yorkshire) : unexplained.
Girl/Female
Anglo Saxon English
Clover.
Female
English
Anglicized form of Irish Rathnait, RONIT means "little prosperous one." Compare with another form of Ronit.
Girl/Female
Arabic French American
A flower name from the older form Jessamine.
Girl/Female
Hindu, Indian, Kannada, Malayalam, Marathi, Telugu
Buddhist Goddess
Boy/Male
Hindu, Indian
Help
Boy/Male
American, Australian, British, English, Irish
King's Doorkeeper; Stranger; Variant of Dorran Stranger
Girl/Female
Indian
Smart, Clever
Girl/Female
Muslim
Polite obedience
Boy/Male
Indian
King of World
ARCHAEA
ARCHAEA
ARCHAEA
ARCHAEA
ARCHAEA
a.
Ancient; pertaining to the earliest period in geological history.
n.
A peculiar structure found in the Archaean limestones of Canada and other regions. By some geologists it is believed to be a species of gigantic Foraminifera, but others consider it a concretion, without organic structure.
a.
Of or pertaining to certain non-fossiliferous rocks on the borders of Lake Huron, which are supposed to correspond in time to the latter part of the Archaean age.
n.
The earliest period in geological period, extending up to the Lower Silurian. It includes an Azoic age, previous to the appearance of life, and an Eozoic age, including the earliest forms of life.