Great find- Cerement's ID is on the dot. They're delightfully bizarre to stumble upon for the first time, aren't they?
Loads of oddball relatives out there as well. I haven't seen this one due to the range being restricted to the west coast (US), but it's completely absurd (Allotropa virgata).
I found it extraordinary- I'm unsure if another movie has made me feel the whole gamut of emotion like this one did, and each heartstring was tugged differently. Skillful stuff.