cavicella cavicella cavicella is a genus of bacteria which belongs to the class gammaproteobacteria with one known species (cavicella subterranea). cavicella subterranea has been isolated from mineral water from a 150-metre-deep borehole in portugal. paraperlucidibaca scientific classification domain: bacteria phylum: pseudomonadota class: gammaproteobacteria order: pseudomonadales family: moraxellaceae genus: cavicellafrança et al. 2015 species c. subterranea cavicella’s temperature range is mesophilic, growing best at moderate temperatures, between 25°c and 40°c. cavicella specifically, grows best at 28°c.