Bestiary Book Direction #1 (Patreon)

Hey everyone!

As I've been building out the bestiary book, I've been noting down the genus of animal that the Sol'Kesh creatures have evolved from. Which is technically correct, but I'm starting to think it's not as easy to grasp compared to if I instead wrote Stem Evolution instead. While a genus is better at a wider range of species, it often requires an online search for the term for the readers and I'm sure most won't bother. 

So my question is, should I simplify this?

For example, to change:

Genus Derived Evolution: Eudyptes  
to
Stem Evolution: Crested Penguins