Cow: Bos Cuboidium
Mooshroom: Bos Cuboidium Muscaria
Bos is the genus for cows. Muscaria is derived from the name Amanita Muscaria which is the Binomial name for the type of mushroom that closely resembles the ones you get from sheering a mooshroom, Fly Amanita (AKA Fly Agaric.)
A little bit...