mahella mahella mahella is a genus in the phylum bacillota (bacteria). the name mahella derives from: neo-latin feminine gender dim. noun mahella, named in honour of the american microbiologist professor r.a. mah, for his important contribution to the taxonomy of anaerobes. mahella scientific classification domain: bacteria phylum: bacillota class: clostridia order: thermoanaerobacterales family: incertae sedis genus: mahella type species m. australiensis species the genus contains a single species, namely m. australiensis ( bonilla salinas et al. 2004, (type species of the genus).; neo-latin feminine gender adjective australiensis, related to australia.)