Melocactus ernestii subsp. longicarpus (Buining & Brederoo) N.P.Taylor in Bradleya 9: 26. 1991
Melocactus ernestii subsp. longicarpus in Bradleya 9: 26. 1991
is new combination for Melocactus longicarpus in Cact. Succ. J. (Los Angeles) 46: 191. 1974