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.
Nystatin is a prescription antifungal medication that comes in several different forms. It is used to treat a variety of different fungal infections, such as thrush and yeast diaper rash. (Click Nystatin Uses for more information on what the medication is used for, including possible off-label uses.).