Valonia may refer to: Valonia (alga), an algae genus in the family Valoniaceae Valonia (spider), a spider genus in the family Sparassidae Valonia oak (Quercus macrolepis), a tree species used in tanning Valonia (fly), a signal fly, described by David McAlpine, 2001 in the family Platystomatidae (Diptera) See also Vallonia Genus disambiguation pages