The number of species within the Copaxa genus has risen the last decade to more then 120, mainly due to the division of multifenestrata, rufinans and decrescens into multiple separate species. The difference between all these new species is often hard to see.
Even before that, the Central and South American Copaxa genus was already quite numerous and variable. Many species feed on Liquidambar and Persea, however there are Copaxa that need Pinus to grow. Salix and Quercus often serve as good alternatives for the Liquidambar feeders. Many (not all) species are fairly easy to rear.