Back محيط تثيس البدائي Arabic Prototethys Czech Proto-Tethys German Océano Proto-Tetis Spanish Prototéthys French Proto-Tetis Galician Samudra Proto-Tethys ID Prototetide Italian Прототетис Macedonian Proto-Tethys-havet NN
The Proto-Tethys or Theic Ocean was an ancient ocean that existed from the latest Ediacaran to the Carboniferous (550–330 Ma).