flavihumibacter petaseus flavihumibacter petaseus flavihumibacter petaseus is a gram-negative and short rod-shaped bacterium from the genus of flavihumibacter which has been isolated from greenhouse soil from korea. flavihumibacter petaseus scientific classification domain: bacteria phylum: bacteroidota class: chitinophagia order: chitinophagales family: chitinophagaceae genus: flavihumibacter species: f. petaseus binomial name flavihumibacter petaseuszhang et al. 2010 type strain cgmcc 1.7723, nbrc 106054, strain t41