winogradskyella ulvae winogradskyella ulvae winogradskyella ulvae is a gram-negative, facultatively anaerobic, slightly halophilic and motile bacterium from the genus of winogradskyella which has been isolated from the alga ulva fenestrata. winogradskyella ulvae scientific classification domain: bacteria phylum: bacteroidota class: flavobacteriia order: flavobacteriales family: flavobacteriaceae genus: winogradskyella species: w. ulvae binomial name winogradskyella ulvaenedashkovskaya et al. 2012 type strain 6390