planctomycetia planctomycetia planctomycetia is a class of aquatic bacteria. planctomycetia scientific classification domain: bacteria phylum: planctomycetota class: planctomycetiaward 2020 orders gemmatales isosphaerales pirellulales planctomycetales synonyms "planctomycetia" cavalier-smith 2020 "planctomycetacia" garrity and holt 2001 planctomycea cavalier-smith 2002 "planctomycetes" oren et al. 2015 phylogeny 16s rrna based ltp_12_2021 gtdb 07-rs207 by genome taxonomy database gemmatales isosphaerales planctomycetales pirellulales isosphaerales dedysh et al. 2020 gemmatales dedysh et al. 2020 planctomycetales schlesner and stackebrandt 1987 pirellulales dedysh et al. 2020