Submatucana ritteri (Buining) Backeb., Cactaceae 6: 3702. 1962 Submatucana ritteri (Buining) Backeb., Cactaceae 6: 3702. 1962is new combination for Matucana ritteri Buining in Succulenta (Netherlands) 1959: 2. 1959Taxon for this nameSubmatucana ritteri (Buining) Backeb.