The Estigena started as a genus, but where then long time considered to be a subgenus of Gastropacha. However, since 2007 and after more thorough DNA comparison, the Estigena genus has been resurrected. There are currently 13 species. Most of them occur in the warmer parts of Asia. Two species are found in Africa.
At least Estigena pardale is easy to rear and will do well on Crataegus (and other Rosaceae). I suspect that many other members of the genus will be as easy (if you can get fresh stock during our spring or summer).