TABLE 1.

Overview of archaeal and bacterial genomes at the NCBI phylum level

Superkingdom	Phylum	No. of genera	No. of species	No. of genomes	Avg 16S rRNA gene copy (mean ± SD)
Archaea	“Candidatus Korarchaeota”	1	1	1	1
	“Candidatus Lokiarchaeota”	1	1	1	1
	“Candidatus Micrarchaeota”	2	2	2	1
	“Candidatus Nanohaloarchaeota”	1	1	1	1
	“Candidatus Thermoplasmatota”	8	10	14	1
	Crenarchaeota	26	56	92	1
	Euryarchaeota	72	217	263	2.0 ± 0.9
	Thaumarchaeota	9	25	25	1.2 ± 0.5
Bacteria	Unclassified	3	4	4	1
	Acidobacteria	10	20	26	1.1 ± 0.3
	Actinobacteria	200	1,172	2,372	3.2 ± 1.9
	Aquificae	9	13	14	1.7 ± 0.6
	Armatimonadetes	1	1	1	2
	Atribacterota	1	1	1	2
	Bacteroidetes	145	518	879	4.1 ± 2.3
	Balneolaeota	1	1	1	3
	Caldiserica	1	1	1	1
	Calditrichaeota	1	1	1	1
	“Candidatus Bipolaricaulota”	1	1	1	1
	“Candidatus Cloacimonetes”	1	1	1	2
	“Candidatus Omnitrophica”	1	1	1	1
	“Candidatus Saccharibacteria”	2	2	2	1
	Chlamydiae	8	25	188	1.7 ± 0.5
	Chlorobi	5	13	13	2.0 ± 0.6
	Chloroflexi	14	20	42	1.4 ± 0.7
	Chrysiogenetes	1	1	2	3
	Coprothermobacterota	1	1	1	2
	Cyanobacteria	50	159	188	2.5 ± 1.1
	Deferribacteres	5	5	5	2
	Deinococcus-Thermus	6	32	61	2.6 ± 0.8
	Dictyoglomi	1	2	2	2
	Elusimicrobia	2	3	4	1
	Fibrobacteres	1	1	2	3
	Firmicutes	257	1,039	5,266	6.9 ± 2.8
	Fusobacteria	7	27	76	5.2 ± 1.1
	Gemmatimonadetes	2	4	4	1.8 ± 0.5
	Ignavibacteriae	2	2	2	1
	Kiritimatiellaeota	1	1	1	1
	Nitrospirae	4	9	10	1.6 ± 0.7
	Planctomycetes	40	49	55	2.1 ± 1.3
	Proteobacteria	706	3,198	13,871	5.5 ± 2.5
	Spirochaetes	13	59	160	1.7 ± 0.8
	Synergistetes	5	5	5	3.2 ± 1.1
	Tenericutes	10	137	426	1.7 ± 0.7
	Thermodesulfobacteria	5	7	7	1.1 ± 0.4
	Thermotogae	11	32	41	1.9 ± 1.2
	Verrucomicrobia	12	18	112	2.8 ± 0.6