Parvarchaeota is a phylum of archaea belonging to the

DPANN DPANN is a superphylum of Archaea first proposed in 2013. Many members show novel signs of horizontal gene transfer from other domains of life. They are known as nanoarchaea or ultra-small archaea due to their smaller size (nanometric) compared t ...

archaea. They have been discovered in

acid mine drainage Acid mine drainage, acid and metalliferous drainage (AMD), or acid rock drainage (ARD) is the outflow of acidic water from metal mines or coal mines. Acid rock drainage occurs naturally within some environments as part of the rock weathering ...

waters and later in marine sediments. The cells of these organisms are extremely small consistent with small

genome In the fields of molecular biology and genetics, a genome is all the genetic information of an organism. It consists of nucleotide sequences of DNA (or RNA in RNA viruses). The nuclear genome includes protein-coding genes and non-coding g ...

Metagenomic Metagenomics is the study of genetic material recovered directly from environmental or clinical samples by a method called sequencing. The broad field may also be referred to as environmental genomics, ecogenomics, community genomics or microb ...

techniques allow obtaining genomic sequences from non-cultured organisms, which were applied to determine this phylum. The

type species In zoological nomenclature, a type species (''species typica'') is the species name with which the name of a genus or subgenus is considered to be permanently taxonomically associated, i.e., the species that contains the biological type specime ...

is Candidatus '' Parvarchaeum acidiphilum''. They have very small cells, around 400-500 nm, and reduced genomes made up of about 1000

gene In biology, the word gene (from , ; "... Wilhelm Johannsen coined the word gene to describe the Mendelian units of heredity..." meaning ''generation'' or ''birth'' or ''gender'') can have several different meanings. The Mendelian gene is a b ...

s. A similar-sized archaea that has been found in the same acidic environments is Candidatus '' Microarcheum'', from the phylum

Micrarchaeota DPANN is a super phylum of Archaea first proposed in 2013. Many members show novel signs of horizontal gene transfer from other domains of life. They are known as nanoarchaea or ultra-small archaea due to their smaller size (nanometric) compared ...

. According to the phylogenetic trees Parvarchaeota may be a sister group of

Thermoplasmata In taxonomy, the Thermoplasmata are a class of the Euryarchaeota. All are acidophiles, growing optimally at pH below 2. ''Picrophilus'' is currently the most acidophilic of all known organisms growing at a minimum pH of 0.06. Many of these orga ...

within

Euryarchaeota Euryarchaeota (from Ancient Greek ''εὐρύς'' eurús, "broad, wide") is a phylum of archaea. Euryarchaeota are highly diverse and include methanogens, which produce methane and are often found in intestines, halobacteria, which survive extr ...

or belong to

, although it has also been suggested that all the DPANN archaea belong phylogenetically to Euryarchaeota.

Taxonomy

The currently accepted taxonomy is based on the

List of Prokaryotic names with Standing in Nomenclature List of Prokaryotic names with Standing in Nomenclature (LPSN) is an online database that maintains information on the nomenclature, naming and Taxonomy (biology), taxonomy of prokaryotes, following the taxonomy requirements and rulings of the In ...

(LPSN) and

National Center for Biotechnology Information The National Center for Biotechnology Information (NCBI) is part of the United States National Library of Medicine (NLM), a branch of the National Institutes of Health (NIH). It is approved and funded by the government of the United States. The ...

(NCBI). * Family "Acidifodinimicrobiaceae" Luo et al. 2020 ** Genus "Candidatus Acidifodinimicrobium" Luo et al. 2020 *** "Ca. A. mancum" Luo et al. 2020 * Family "Parvarchaeaceae" Rinke et al. 2020 ** Genus "Candidatus Parvarchaeum" Baker et al. 2010 *** "Ca. P. acidiphilum" Baker et al. 2010 *** "Ca. P. paracidiphilum" corrig. Baker et al. 2010

References

{{Taxonbar, from=Q25508584 Archaea

Taxonomy

See also

References