pyrodictiaceae pyrodictiaceae the pyrodictiaceae are a family of disc-shaped anaerobic microorganisms belonging to the order desulfurococcales, in the domain archaea. members of this family are distinguished from the other family (desulfurococcaceae) in the order desulfurococcales by having an optimal growth temperature above 100 °c, rather than below 100 °c. pyrodictiaceae scientific classification domain: archaea kingdom: proteoarchaeota superphylum: tack group phylum: thermoproteota class: thermoprotei order: sulfolobales family: pyrodictiaceaeburggraf, huber & stetter 1997 genera geogemma hyperthermus pyrodictium pyrolobus 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). 16s rrna based ltp_12_2021. 53 marker proteins based gtdb 07-rs207. pyrolobus fumarii pyrodictium brockii stetter et al. 1984 hyperthermus butylicus pyrodictium p. occultum p. abyssi pley and stetter 1991 p. delaneyi pyrolobus fumarii blöchl et al. 1999 hyperthermus butylicus zillig et al. 1991 pyrodictium p. delaneyi lin et al. 2016 p. occultum stetter et al. 1984