Evolution of cetaceans decreasing. Other historical climate events can be correlated and matched with the genome history of the Yangtze River dolphin as well. This shows how global and local climate change can drastically affect a genome, leading to changes in fitness, survival, and evolution of a species. The European population of common dolphins ("Delphinus delphis") in the Mediterranean have differentiated into two types: eastern and western. According to a 2012 study, this seems to be due to a recent bottleneck as well, which drastically decreased the size of the eastern Mediterranean population. Also, the lack of population structure between the western and
Buru (legendary creature) a large Komodo dragon-like monitor lizard, and there are fossils of such a creature to be found in the Indian subcontinent. Heuvelmans notes similar reported creatures from Western India under the name of "jhoors" where they seem to merge into the Iranian traditional dragon or ahi (Azi Dahaka), which in Iranian art is basically a local stylistic adaptation of the Chinese dragon. George Eberhart notes rumors of a similar creature in the Tigris marshes of Iraq, called the afa, possibly the same thing as ahi. Heuvelmans also notes in his checklist of unknown animals that similar reports to the buru