flavobacteriales flavobacteriales the order flavobacteriales comprises several families of environmental bacteria. flavobacteriales bergeyella zoohelcum scientific classification domain: bacteria phylum: bacteroidota class: flavobacteriia order: flavobacterialesbernardet 2012 families blattabacteriaceae crocinitomicaceae cryomorphaceae flavobacteriaceae ichthyobacteriaceae luteibaculaceae salibacteraceae schleiferiaceae vicingaceae weeksellaceae comparative genomics and molecular signatures flavobacteriales is of one of the orders from the phylum bacteroidota. comparative genomic studies have identified several conserved indels, as well as 27 proteins that are uniquely shared by different sequenced flavobacteriales and bacteroidota species supporting this inference. additionally, these studies have also identified 38 proteins that seem to be specific for the species from the order flavobacteriales. of these proteins, 26 were present in all sequenced species, while the remaining 12 were missing in only one or two species. these signature proteins provide potential molecular markers for this order. several proteins have also been identified which are unique to the flavobacteriales and bacteroidales orders, indicating the species from these two orders shared a common ancestor exclusive of other bacteroidota. phylogeny the currently accepted taxonomy is based on the list of prokaryotic names with standing in nomenclature. whole-genome based phylogeny 16s rrna based ltp_12_2021 gtdb 07-rs207 by genome taxonomy database flavobacteriales crocinitomicaceae cryomorphaceae schleiferiaceae ichthyobacteriaceae flavobacteriaceae weeksellaceae schleiferiaceae salibacteraceae cryomorphaceae vicingaceae luteibaculaceae crocinitomicaceae ichthyobacteriaceae weeksellaceae flavobacteriaceae vicingaceae bowman 2021 salibacteraceae bowman 2021 luteibaculaceae bowman 2021 cryomorphaceae bowman et al. 2003 crocinitomicaceae munoz et al. 2016 schleiferiaceae albuquerque et al. 2011 blattabacteriaceae kambhampati 2012 weeksellaceae garcía-lópez et al. 2020 "ca. merdimorpha" gilroy et al. 2021 ichthyobacteriaceae takano et al. 2016 flavobacteriaceae reichenbach 1992 notes blattabacteriaceae is not included in this phylogenetic tree.