Summary of thaumarchaeotal 16S rRNA gene sequences used for phylogenetic analysis and primer design.

aPhylum- and class-level archaeal groups. bRDP database release 10.22. cFiltered using quality check option (http://rdp.cme.msu.edu). dStandard deviation. eSequences belong to unclassified Thermoprotei. fNot shown in RDP database. gSubgroups in Thaumarchaeota (sequences closely related to MG-I). FSCG (forest soil crenarchaeotic group); HWCG-III (hot water crenarchaeotic group III); MG-I (marine group I); RC (rice cluster); SAGMCG-I (South Africa gold mine crenarchaeotic group I); SCG (soil crenarchaeotic group). hUnclassified Thaumarchaeota. Unclassified thaumarchaeotal subgroups found in this study. iArchaeal groups distantly related to the phylum Thaumarchaeota. DSAG (deep sea archaeotic group); THSCG (terrestrial hot spring crenarchaeotic group); MCG (miscellaneous crenarchaeotic group); UG (unclassified group). jAs shown in RDP database. kStandard deviation not available.