User blog comment:Saikou The Lewd King/Ancestry Tree/@comment-34962159-20180913111026

You can also add in the Pabilsags and Beelzebubs as the first Insect races, with all other Insects being descended from the Pabilsags (mentioned in Bee Girl's battle dialogue).

I think that Hiruko is likely the ancestor of the other aquatic races, the Mermaids and Sea-Dwellers, in addition to Scyllas. Likewise, Minagi is probably the ancestor of all humanoid races, including Elves (there's the running gag of Elves being secretly lewd).

Some of these connections don't make sense to me. For example, why is the Bear seen as the ancestor to several lineages? There's nothing in the Grizzly Bear Girl's dialogue that supports this.