Earth-14
From Multiversal Omnipedia
Earth-14 was a parallel Earth with a unique species of purple butterflies.
Post-Crisis, Post-Zero Hour
This world ceased to exist during the Crisis on Infinite Earths, but it could have survived in a hypertimeline. One of the purple butterflies from this world remained on "Earth-Sigma" following the "Second Crisis."
References
- Animal Man #24 (1990)