Prothysana felderi is a moth in the family Bombycidae, whose larvae are known as shag-carpet caterpillars. It is found from Mexico, south to Panama and into South America, at least to Ecuador.

Vitor Osmar Becker included Compsa saturata and Mimallo trilunula as synonyms of Prothysana terminalis in 2001, but excluded Prothysana felderi from this synonymy, retaining it as a separate species.

Recorded food plants for the two species of Prothysana (whose larvae cannot be distinguished from one another) include Philodendron, Heliconia, Welfia georgii, Chamaedora tepejilote, Piptocarpha poeppigiana, Pentaclethra macroloba, Stigmaphyllon lindinianum, Piper colonense, Piper hispidum, Piper auretum, Piper peltata, Neea psychotroides, Lycianthes synanthera, Heliocarpus appendiculatus, Miriocarpa longipes and Aegifila falcata.