Oceanirhabdus

Abstract Oceanirhabdus (O.ce.a.ni.rhab'dus. L. masc. n. oceanus ocean; Gr. fem. n. rhabdos rod; N.L. fem. n. Oceanirhabdus a rod of the ocean). Cells are rod‐shaped with peritrichous flagella. Endospores form during stationary phase of growth. Cells are Gram‐positive staining. Colonies are circular, white, semitransparent with a smooth surface. Obligate anaerobes. Optimal growth at pH 6.5–7.0, 34–38°C, and 2.5% (w/v) NaCl. Cells can utilize multiple types of complex proteinaceous substrates as carbon and energy sources. The predominant cellular fatty acids are anteiso‐C 15:0 , C 16:0 , iso‐C 15:0 , anteiso‐C 17:0 , and C 16:0 DMA. No isoprenoid quinone is detected. Oceanirhabdus is in the class Clostridia , the order Clostridiales , and the family Clostridiaceae . The genus Oceanirhabdus comprises one species, Oceanirhabdus sediminicola . The type strain of the type species of the genus was isolated from marine sediments. Phylogenetic analysis of 16S rRNA genes indicates that Oceanirhabdus is a lineage that is separated from the closely related genera in the family Clostridiaceae . DNA G + C content (mol%) : 35.8 (HPLC). Type species : Oceanirhabdus sediminicola Pi et al. 2013 VP . Taxonomic and Nomenclature Notes According to the List of Prokaryotic names with Standing in Nomenclature (LPSN), the taxonomic status of the genus Oceanirhabdus is: correct name (last update, February 2025) * . LPSN classification: Bacteria / Bacillati / Bacillota / Clostridia / Eubacteriales / Clostridiaceae / Oceanirhabdus The genus Oceanirhabdus can also be recovered in the Genome Taxonomy Database (GTDB) as g__Oceanirhabdus (version v220) ** . GTDB classification: d__Bacteria / p__Bacillota_A / c__Clostridia / o__Clostridiales / f__Clostridiaceae / g__Oceanirhabdus * 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