Tethyan realm The faunal province (see FAUNAL REALM) based in the region of the Tethys Sea. Characteristically Jurassic to Cretaceous in age, the Tethyan Realm denotes a warm-water, tropical to subtropical fauna and flora. The name may also be applied to warm-water faunas and floras of Mesozoic age outside the area of Tethys, especially when used in contrast to the Boreal (northern) and Austral (southern) Realms.

Tethyan realm The faunal realm based in the region of the Tethys Sea. Characteristically Jurassic to Cretaceous in age, it comprised a warm-water, tropical to subtropical fauna and flora. The name may also be applied to warm-water fauna and flora of Mesozoic age outside the area of Tethys, especially when used in contrast to the Boreal (northern) and Austral (southern) Realms.