"Despite this limitation, the available fossils provide a broad view of faunal changes that have occurred since the Middle Miocene and form a foundation for hypotheses regarding the origins of modern species. The evolution of Anuran fauna in Morocco appears to be closely linked to climatic variations and paleogeographic transformations."
January 1, 1970
https://en.wikiquote.org/wiki/Sa%C3%AFda_Hossini