edaphobacter modestus edaphobacter modestus edaphobacter modestus is a species of bacteria. it is the type species of the genus edaphobacter and was originally isolated from an alpine soil sample rich in calcium carbonate. edaphobacter modestus scientific classification domain: bacteria phylum: acidobacteriota class: "acidobacteriia" order: acidobacteriales family: acidobacteriaceae genus: edaphobacter species: e. modestus binomial name edaphobacter modestuskoch et al. 2008