moorella glycerini moorella glycerini moorella glycerini is a thermophilic, homoacetogenic, anaerobic and endospore-forming bacterium from the genus moorella, which has been isolated from a hot spring from the calcite spring area from the yellowstone national park in the united states. this microorganism utilizes glycerol as a growth substrate and is considered gram-positive type. moorella glycerini scientific classification domain: bacteria phylum: bacillota class: clostridia order: thermoanaerobacterales family: thermoanaerobacteraceae genus: moorella species: m. glycerini binomial name moorella glycerinislobodkin et al. 1997 type strain atcc 700316, dsm 11254, jw/as-y6