How updated is the mod in terms of paleocreatures? For the Ediacaran, try to use these creatures:
From https://www.reddit.com/r/Naturewasmetal/comments/1424gly/a_collection_of_ediacaran_cuties/
I used this image as a reference for making my Ediacaran and Francevillian texture pack.
Also include Uncus dzaugisi - Wikipedia and Yilingia - Wikipedia, since these two are most proven to have decision making.