Table 1 Generic diversity of Mesozoic and extant marine reptile groups

Extant

Sea snake

16

Sea turtle

6

Sea krait

1

Marine iguana

1

Mesozoic

Sauropterygia

Placodontia

ca. 10

Plesiosauria

ca. 70

Others

ca. 20

Ichthyopterygia

ca. 40

Mosasauroidea

Mosasauridae

ca. 30

Others

ca. 10

Marine snakes*

ca. 5

Chelonioidea

ca. 30

Thalattosauria

ca. 10

Thalattosuchia

ca. 10

Marine Pleurodira

ca. 10

Marine Cryptodira

ca. 10

Pleurosauridae

2

Hupehsuchia

2

Qianosuchus

1

Sikannisuchus

1