Phascolarctobacterium

Abstract Phas.co.larc'to.bac.te'ri.um. Genus name Phascolarctos Koala; Gr. neut. dim. n. bakterion rod; N.L. neut. n. Phascolarctobacterium bacterium of Koalas. Pleomorphic rods , 0.5 × 2.0 µm to 0.5 × 5–20 µm. Pleomorphism is medium dependent; in the presence of succinate small rods are transformed into elongated and fragmented rods with multiple branches. Gram‐stain‐negative, nonmotile, nonspore‐forming chemo‐organotroph. Propionic acid is the main end product of succinate fermentation . Growth inhibited by fumarate. Growth of satellite colonies around colonies of succinate‐producing Escherichia coli cells. Obligately anaerobic . Growth most rapid at 30–37°C. Phylogenetically a member of the family Veillonellaceae , phylum Firmicutes . So far Succiniclasticum ruminis is the closest phylogenetic neighbor. DNA G + C content ( mol %): 41.4–42.3 ( T m ). Type species : Phascolarctobacterium faecium Del Dot, Osawa and Stackebrandt 1994, 182 VP (Effective publication: Del Dot, Osawa and Stackebrandt 1993, 383.). Taxonomic and Nomenclature Notes According to the List of Prokaryotic names with Standing in Nomenclature (LPSN), the taxonomic status of the genus Phascolarctobacterium is: correct name (last update, February 2025) * . LPSN classification: Bacteria / Bacillati / Bacillota / Negativicutes / Acidaminococcales / Acidaminococcaceae / Phascolarctobacterium The genus Phascolarctobacterium can also be recovered in the Genome Taxonomy Database (GTDB) as g__Phascolarctobacterium (version v220) ** . GTDB classification: d__Bacteria / p__Bacillota_C / c__Negativicutes / o__Acidaminococcales / f__Acidaminococcaceae / g__Phascolarctobacterium * 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