For 10 points, name this ancient body of water which formed from the breakup of Pangaea during the Triassic, a sea separating Laurasia from Gondwana and  named after the wife of Oceanus.
Locations in this body of water included an island that contained dwarfish species, leading Franz Nopcsa to coin what would become Foster's rule.  That location in this body of water contained Telmatosaurs and Magyarosaurs and was called Hateg Island.  This body of water formed after the Cimmerian (*) plate moved northward, which put it in the same location as a similarly-named predecessor.  The formation of the Indian Ocean caused this body of water to shrink, and its remnants include the ► Mediterranean and Arabian Seas.  For 10 points, name this ancient body of water which formed from the breakup of Pangaea during the Triassic, a sea separating Laurasia from Gondwana and  named after the wife of Oceanus.
Locations in this body of water included an island that contained dwarfish species, leading Franz Nopcsa to coin what would become Foster's rule.  
Tethys Sea [or Tethys Ocean; do not accept "Proto-Tethys" or "Paleo-Tethys" as they are actually distinct bodies]