There are quite the number of species listed for the African Gastroplakaeis genus, however of the 19 names many will be synonyms. Most likely there are only around 10 valid species. Gastroplakaeis are medium sized moths and many of them look quite similar, especially the males.
When you get the chance to rear one of them, do not hesitate. The caterpillars of many species are exceptionally beautiful. The start of the brood can be a bit rough though and they are not the easiest species to rear.