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Table 1 Phylum distribution of the 1621 species in QuartetS-DB

From: QuartetS-DB: a large-scale orthology database for prokaryotes and eukaryotes inferred by evolutionary evidence

Phylum (Superkingdom)*

Number of species

Proteobacteria (B)

669

Firmicutes (B)

303

Actinobacteria (B)

137

Euryarchaeota (A)

60

Bacteroidetes (B)

57

Ascomycota (E)

51

Cyanobacteria (B)

44

Crenarchaeota (A)

28

Tenericutes (B)

27

Chordata (E)

22

Spirochaetes (B)

21

Arthropoda (E)

21

Fusobacteria (B)

15

Chlamydiae (B)

15

Chloroflexi (B)

14

Apicomplexa (E)

13

Thermotogae (B)

11

Chlorobi (B)

11

Streptophyta (E)

10

Other

92

Total

1621

  1. * Superkingdom: (B) Bacteria, (A) Archaea, (E) Eukarya.