Eurysternidae is an

extinct Extinction is the termination of a kind of organism or of a group of kinds (taxon), usually a species. The moment of extinction is generally considered to be the death of the last individual of the species, although the capacity to breed and ...

family of

turtle Turtles are an order of reptiles known as Testudines, characterized by a special shell developed mainly from their ribs. Modern turtles are divided into two major groups, the Pleurodira (side necked turtles) and Cryptodira (hidden necked tu ...

s in the clade

Thalassochelydia Thalassochelydia is a clade of extinct marine turtles from the Late Jurassic and earliest Cretaceous of Europe and South America. The group is defined as including ''Eurysternum'', ''Plesiochelys'' and ''Thalassemys'' to the exclusion of ''Pelome ...

. It consists of several genera of marine turtles from marine deposits in Europe, including '' Achelonia'', '' Chelonides'', ''

Eurysternum ''Eurysternum'' is an extinct genus of thalassochelydian turtle. Its type species is ''Eurysternum wagleri'', the holotype of which has since been lost and only survives in illustrations. Formerly assigned species ''Eurysternum ignoratum'' Bra ...

''. '' Hydropelta'', '' Chelonides'', '' Idiochelys'', ''

Palaeomedusa ''Palaeomedusa testa'' is an extinct species of thalassochelydian turtle from the Tithonian of the Late Jurassic (145.5 to 150.8 million years ago). It was first described by the German palaeontologist Christian Erich Hermann von Meyer in 1860.F ...

'', '' Parachelys''. and ''

Solnhofia ''Solnhofia'' is a genus of extinct thalassochelydian turtle from the Late Jurassic of Germany. The type species is ''Solnhofia parsonsi'', named by Gaffney in 1975 for a partial skull and jaw from the early Tithonian of the Solnhofen Formation ...

''.

References

Thalassochelydia Prehistoric reptile families Late Jurassic turtles Late Jurassic reptiles of Europe Taxa named by Louis Dollo {{paleo-turtle-stub