The Mascarene grass frog or Mascarene ridged frog (Ptychadena mascareniensis) is a species of frog in the Ptychadenidae family. It is found in Angola, Botswana, Cameroon, Central African Republic, Democratic Republic of the Congo, Ivory Coast, Egypt, Equatorial Guinea, Ethiopia, Gabon, Ghana, Guinea, Guinea-Bissau, Kenya, Liberia, Madagascar, Malawi, Mauritius, Mozambique, Namibia, Nigeria, Rwanda, Réunion, Senegal, Seychelles, Sierra Leone, South Africa, Sudan, Tanzan