"Parvarchaeota" is a phylum of archaea belonging to the Nanobdellati kingdom. They have been discovered in acid mine drainage waters and later in marine sediments. The cells of these organisms are extremely small consistent with small genomes. Metagenomic techniques allow obtaining genomic sequences from non-cultured organisms, which were applied to determine this phylum.
The type species is "Candidatus Parvarchaeum acidiphilum". They have very small cells, around 400-500 nm, and reduced genomes made up of about 1000 genes. A similar-sized archaea that has been found in the same acidic environments is "Ca. Microarcheum", from the phylum Micrarchaeota.Brett J. Baker, Gregory J. Dick. Omic, Approaches in Microbial Ecology:Charting the Unknown Analysis of wholecommunity sequence data is unveiling the diversity and function of specific microbial groups within uncultured phyla and across entire microbial ecosystems. Academia.edu.
According to the phylogenetic trees "Parvarchaeota" may be a sister group of Thermoplasmata within Euryarchaeota or belong to Nanobdellati, although it has also been suggested that all the Nanobdellati archaea belong phylogenetically to Euryarchaeota.
Taxonomy The currently accepted taxonomy is based on the List of Prokaryotic names with Standing in Nomenclature (LPSN) and National Center for Biotechnology Information (NCBI).
Class "Parvarchaeia" Order "Tiddalikarchaeales" Vazquez-Campos et al. 2021 Family "Tiddalikarchaeaceae" Vazquez-Campos et al. 2021 Genus "Candidatus Tiddalikarchaeum" Vazquez-Campos et al. 2021 "Ca. T. anstoanum" Vazquez-Campos et al. 2021 Order "Jingweiarchaeales" Rao et al. 2023 Family "Jingweiarchaeaceae" Rao et al. 2023 Genus "Candidatus Jingweiarchaeum" Rao et al. 2023 "Ca. J. tengchongense" Rao et al. 2023 Order JAPDLS01 Family "Haiyanarchaeaceae" Rao et al. 2023 Genus "Candidatus Haiyanarchaeum" Rao et al. 2023 "Ca. H. thermophilum" Rao et al. 2023 Order "Parvarchaeales" Rinke et al. 2020 Family "Parvarchaeaceae" Rinke et al. 2020 ["Acidifodinimicrobiaceae" Luo et al. 2020] Genus "Candidatus Rehaiarchaeum" Rao et al. 2023 "Ca. R. fermentans" Rao et al. 2023 Genus "Candidatus Acidifodinimicrobium" Luo et al. 2020 "Ca. A. mancum" Luo 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 "Ca. P. tengchongense" Rao et al. 2023
Phylogeny Phylogeny of "Parvarchaeota".
See also List of Archaea genera
References