In fact, none of the individual animals on the evogram is the direct ancestor of any other, as far as we know. That's why each of them gets its own branch on the family tree. Hippos are large and aquatic, like whales, but the two groups evolved those features separately from each other.
Pitavastatin (usually as a calcium salt) is a member of the blood cholesterol lowering medication class of statins, marketed in the United States under the trade name Livalo, and in European Union and Russia under the trade name Livazo.
Like other statins, it is an inhibitor of HMG-CoA reductase, the enzyme that catalyses the first step of cholesterol synthesis. It has been available in Japan since 2003, and is being marketed in South Korea and in India. It is expected that pitavastatin will be approved outside Southeast Asia as well. In the US, it received FDA approval in 2009. Kowa Pharmaceuticals is the owner of the American patent to pitavastatin.