Thanks for sharing!
Art Deco-ish/30's butterfly is about the closest I found (though those looked daintier than these - so maybe it's a moth? Ha!). I asked my sister to check with her friend at the International Quilt Study Center & Museum in Lincoln, Nebraska. If I hear anything I'll add a comment. Unfortunately, my sister has little interest in quilting so I hope she remembers to pass on my question.
It is a very nice block - like hairquilt above, I too prefer it to the Dresden Fan.
For fun - things I know it's not, but with the right fabrics (or enough wine) might work:
Men's suit & tie
Island volcano with lava flowing to the sea
Moth or beetle