ائوستوس

Eocetus (from Ancient Greek ἠώς (ēṓs), meaning "dawn", and Latin cetus, meaning "whale", and thus, "dawn whale") is an extinct protocetid early whale known from the early-late Eocene (Bartonian, ) Giushi Formation in Gebel Mokattam, (, paleocoordinates ) outside Cairo, Egypt. Fossil remains have also been discovered in the Aridal Formation of the Sahara Desert in southwestern Morocco.