flexibacter flexibacter flexibacter is a genus of bacteria consisting of some seventeen strains (or species), known for their yellow hue. flexibacter scientific classification domain: bacteria phylum: bacteroidota class: cytophagia order: cytophagales family: flexibacteraceaegarcía-lópez et al. 2020 genus: flexibactersoriano 1945 (approved lists 1980) species "flexibacter alginoliquefaciens" katayama et al. 1985 flexibacter flexilis soriano 1945 (approved lists 1980) "flexibacter giganteus" soriano 1945 "flexibacter topostinus" suzuki et al. 1990 synonyms "flexibacteraceae" garrity and holt 2001 etymology: l. part. adj. flexus (from. l. v. flecto), bent, winding; n.l. masc. n. bacter, rod; n.l. masc. n. flexibacter, intended to mean flexible rod.