Proterochersidae is an extinct family of

stem Stem or STEM may refer to: Plant structures * Plant stem, a plant's aboveground axis, made of vascular tissue, off which leaves and flowers hang * Stipe (botany), a stalk to support some other structure * Stipe (mycology), the stem of a mushr ...

-turtles belonging to

Testudinata Testudinata is the group of all tetrapods with a true turtle shell. It includes both modern turtles (Testudines) and many of their extinct, shelled relatives (stem-turtles). Though it was first coined as the group containing turtles by Jacob T ...

List of genera

There are two genera: * '' Keuperotesta'' Szczygielski & Sulej, 2016 (junior

synonym A synonym is a word, morpheme, or phrase that means exactly or nearly the same as another word, morpheme, or phrase in a given language. For example, in the English language, the words ''begin'', ''start'', ''commence'', and ''initiate'' are al ...

of ''Proterochersis''?) ** '' Keuperotesta limendorsa'' Szczygielski & Sulej, 2016 * ''

Proterochersis ''Proterochersis'' is an extinct genus of turtle from the Late Triassic period (Norian stage) of Europe. It is known from a large number of fossils uncovered in Germany and Poland.Fraas E (1913)"''Proterochersis'', eine pleurodire Schildkröte aus ...

Fraas Fraas is a surname. Notable people with the surname include: *Eberhard Fraas (1862–1915), German geologist and paleontologist, son of Oscar * Karl Nikolas Fraas (1810–1875), German botanist *Oscar Fraas (1824–1897), German paleontologist See ...

, 1913 ** ''Proterochersis intermedia'' Fraas, 1913 (synonym of ''P. robusta''?) ** ''

Proterochersis porebensis ''Proterochersis'' is an extinct genus of turtle from the Late Triassic period (Norian stage) of Europe. It is known from a large number of fossils uncovered in Germany and Poland.Fraas E (1913)"''Proterochersis'', eine pleurodire Schildkröte aus ...

'' Szczygielski & Sulej, 2016 ** ''

Proterochersis robusta ''Proterochersis'' is an extinct genus of turtle from the Late Triassic period (Norian stage) of Europe. It is known from a large number of fossils uncovered in Germany and Poland.Fraas E (1913)"''Proterochersis'', eine pleurodire Schildkröte aus ...

'' Fraas, 1913

References

Testudinata Triassic reptiles of Europe Taxa named by Franz Nopcsa von Felső-Szilvás Fossil taxa described in 1928 {{paleo-turtle-stub