) Backeb., "Machaerocereus" Britton & Rose, "Marshallocereus" Backeb., "Neolemaireocereus" Backeb., "Rathbunia" Britton & Rose, "Ritterocereus" Backeb.
) Backeb., "Machaerocereus" Britton & Rose, "Marshallocereus" Backeb., "Neolemaireocereus" Backeb., "Rathbunia" Britton & Rose, "Ritterocereus" Backeb.