pirellulales pirellulales pirellulales is an order of bacteria. pirellulales scientific classification domain: bacteria phylum: planctomycetota class: planctomycetia order: pirellulalesdedysh et al., 2020 families lacipirellulaceae pirellulaceae thermoguttaceae phylogeny the currently accepted taxonomy is based on the list of prokaryotic names with standing in nomenclature (lpsn) and national center for biotechnology information (ncbi) 120 marker proteins based gtdb 07-rs207 and 16s rrna based ltp_01_2022 thermoguttaceae dedysh et al. 2020 lacipirellulaceae dedysh et al. 2020 pirellulaceae dedysh et al. 2020