Geoalkalibacter

Abstract Ge.o.al.ka.li.bac.ter. Gr. fem. n. gê , earth; Arabic article al , the; Arabic masc. n. qaly , ashes of saltwort; N.L. neut. n. alkali , alkali (indeclinable); N.L. masc. n. bacter , rod; N.L. masc. n. Geoalkalibacter , a rod from alkaline earth. The genus Geoalkalibacter is represented by Gram‐negative non‐spore‐forming rods. Cells of most species of the genus are motile by means of laterally or polarly located flagella. Members of the genus are strictly anaerobic, alkalitolerant or obligately alkaliphilic, and halotolerant or moderately halophilic mesophiles. They grow by anaerobic respiration with Fe(III), Mn(IV), or sulfur compounds as an electron acceptor. Molecular hydrogen, organic acids, alcohols, peptides, and Fe(II)‐containing minerals can serve as electron donors. All members of the genus are electroactive microorganisms that use extracellular electron transfer (EET) to achieve respiratory processes with insoluble electron acceptors. Some of these bacteria are capable of atmospheric nitrogen fixation. The known habitats are haloalkaline soda lakes and subsurface oil reservoirs. The genus Geoalkalibacter contains two species with validly published names and belongs to the phylum Desulfobacterota , class Desulfuromonadia, order Desulfuromonadales , and family Geoalkalibacteraceae . DNA G + C content (mol %) : 57.05–60.57 (genome analysis). Type species : Geoalkalibacter ferrihydriticus Zavarzina et al. 2006, VL115. Taxonomic and Nomenclature Notes According to the List of Prokaryotic names with Standing in Nomenclature (LPSN), the taxonomic status of the genus Geoalkalibacter is: correct name (last update, February 2025) * . LPSN classification: Bacteria / Pseudomonadati / Pseudomonadota / Deltaproteobacteria / Desulfuromonadales / Desulfuromonadaceae / Geoalkalibacter The genus Geoalkalibacter can also be recovered in the Genome Taxonomy Database (GTDB) as g__Geoalkalibacter (version v220) ** . GTDB classification: d__Bacteria / p__Desulfobacterota / c__Desulfuromonadia / o__Desulfuromonadales / f__Geoalkalibacteraceae / g__Geoalkalibacter * Meier‐Kolthoff et al. ( 2022 ). Nucleic Acids Res , 50 , D801 – D807 ; DOI: 10.1093/nar/gkab902 ** Parks et al. ( 2022 ). Nucleic Acids Res , 50 , D785 – D794 ; DOI: 10.1093/nar/gkab776