leptolinea tardivitalis leptolinea tardivitalis leptolinea tardivitalis is a mesophilic, non-spore-forming, non-motile, gram-negative, filamentous bacteria with type strain ymtk-2t (=jcm 12579t =dsm 16556t), the type species of its genus. leptolinea tardivitalis scientific classification domain: bacteria phylum: chloroflexota class: anaerolineae order: anaerolineales family: anaerolineaceae genus: leptolinea species: l. tardivitalis binomial name leptolinea tardivitalisyamada et al. 2006