Aeolid Nudibranchs are coded as Dexiarchia in the tree of life. In the field, it is sometimes not easy to distinguish them from Euctenidiacea (Dorid nudibranchia). But in most cases it is an essential first guide to identify a species more easily.
Go here for a full list of the species represented in this photo gallery. Clicking a photo will show more photos in some cases and some text relating to the species. I will try to populate it some more in the coming months.