flexilinea flexilinea flexilinea is a bacteria genus from the family of anaerolineaceae with one known species (flexilinea flocculi). flexilinea flocculi has been isolated from methanogenic granular sludge. flexilinea scientific classification domain: bacteria phylum: chloroflexota class: anaerolineae order: anaerolineales family: anaerolineaceae genus: flexilineasun et al. 2016 type species flexilinea flocculi species f. flocculi