kinds of fish, the hippo Hexaprotodon protamphibius, an otter, a Geochelone tortoise, a Trionyx softshell turtle, a false gharial, and an anatid waterbird. These aquatic animals indicate Koro Toro had open-water lakes or streams with swampy grassy margins, connected to the Nilo-Sudan waterways (including the Nile, Chari, Niger, Senegal, Volta, and Gambia Rivers). Koro Toro, during Mega-Chad events (which have been cyclical for the last 7 million years), may have been similar to the modern Okavango Delta. See also African archaeology Ardipithecus ramidus Australopithecus anamensis Australopithecus afarensis Australopithecus deyiremeda Kenyanthropus List of fossil sites (with link directory) List of human evolution fossils (with images) References External links Australopithecus bahrelghazali, Abel Human Timeline (Interactive) – Smithsonian, National Museum of Natural History (August 2016). Australopithecus Fossil taxa described in 1995 Prehistoric Chad Pliocene primates Pliocene mammals of Africa