A last remnant of Paleo-Tethys Ocean might be an oceanic crust under the Black Sea.
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The highest concentration of species occurred in the Tethys Ocean during the upper Cretaceous.
In the Hochkalter and Hocheis Groups, the harder Dachstein limestone predominates, rock that was formed by sedimentation in the Tethys Ocean during the Late Triassic stage (220 million years ago).
The mountain range formed at the northern edges of the Cimmerian Plate during its collision, in the Late Triassic, with Siberia, which resulted in the closing of the Paleo-Tethys Ocean.
Thus, it would seem to have been a native of the prehistoric North Sea, which at that time covered part of today's Germany and France, and sometimes was cut off from the Tethys and Atlantic Oceans, sometimes connected to them, and sometimes even to the Turgai Sea.
The name means "Tethys' lizard of Nopsca", a reference to the Greek goddess of the sea Tethys (also the name of the Tethys Ocean, an ancient sea between southern Europe and northern Africa) and to the Hungarian paleontologist Baron Ferenc Nopsca, who made pioneering studies on Adriatic aquatic squamates.