Table 1 Summary of analyzed genomes. Waddlia chondrophila is the only bacterium outside genus Chlamydia, it was used as an outgroup to construct the rooted phylogenetic tree of the genus

Chlamydia trachomatis

110

95

1.04

904

Chlamydia suis

30

11

1.09

924

Chlamydia abortus

27

7

1.16

982

Chlamydia psittaci

25

20

1.17

977

Chlamydia pneumoniae

12

12

1.23

1046

Chlamydia pecorum

10

6

1.11

950

Chlamydia muridarum

3

2

1.07

905

Chlamydia gallinacea

2

2

1.06

907

Chlamydia avium

1

1

1.04

895

Chlamydia caviae

1

1

1.17

981

Candidatus Chlamydia corallus

1

0

1.20

1005

Chlamydia felis

1

1

1.17

981

Chlamydia ibidis

1

0

1.15

955

Chlamydia poikilothermis

1

1

1.16

972

Chlamydia sanzinia

1

1

1.11

932

Chlamydia serpentis

1

1

1.20

992

Waddlia chondrophila

1

1

2.12

1839