Table 2 Composition of the pH Dataset: 186 DNA fragments from microbial genomes/species (117 DNA fragments from bacterial genomes, and 69 DNA fragments from archaeal genomes).

From: Environment and taxonomy shape the genomic signature of prokaryotic extremophiles

Domain

pH category

# Phyla

# Classes

# Orders

# Families

# Genera

# Species

Archaea

Acidophiles

4

5

7

11

24

39

Alkaliphiles

2

5

5

9

18

30

Bacteria

Acidophiles

10

12

13

13

32

61

Alkaliphiles

12

14

25

30

36

56