Species and varieties
Ritterocactus allosiphon synonym of Parodia allosiphon
Ritterocactus arnostianus synonym of Parodia arnostiana
Ritterocactus ayopayanus synonym of Parodia ayopayana
Ritterocactus curvispinus synonym of Parodia curvispina
Ritterocactus fuscus synonym of Parodia fusca
Ritterocactus horstii synonym of Parodia neohorstii
Ritterocactus langsdorfii synonym of Parodia langsdorfii
Ritterocactus langsdorfii ssp. pulvinatus synonym of Parodia langsdorfii
Ritterocactus mammulosus synonym of Parodia mammulosa (Tom Thumb Cactus)
Ritterocactus mammulosus ssp. brasiliensis synonym of Parodia mammulosa ssp. brasiliensis
Ritterocactus mammulosus ssp. erythracanthus synonym of Parodia mammulosa ssp. erythracantha
Ritterocactus mammulosus ssp. eugeniae synonym of Parodia mammulosa ssp. eugeniae
Ritterocactus mammulosus ssp. submammulosus synonym of Parodia mammulosa ssp. submammulosa
Ritterocactus megalanthus synonym of Parodia mammulosa (Tom Thumb Cactus)
Ritterocactus meonacanthus synonym of Parodia meonacantha
Ritterocactus mueller-melchersii synonym of Parodia mueller-melchersii
Ritterocactus mueller-melchersii ssp. gutierrezii synonym of Parodia mueller-melchersii ssp. gutierrezii
Ritterocactus mueller-melchersii ssp. winkleri synonym of Parodia mueller-melchersii ssp. winkleri
Ritterocactus permutatus synonym of Parodia permutata
Ritterocactus rauschii synonym of Parodia nothorauschii
Ritterocactus rutilans ssp. veenianus synonym of Parodia rutilans ssp. veeniana
Ritterocactus uebelmannianus ssp. pleiocephalus synonym of Parodia werneri ssp. pleiocephala
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