Marshallocereus Backeb. in Cact. Succ. J. (Los Angeles) 22: 154. 1950 sec. Arias 2021



Phylogenetics: Some phylogenetic analyses and taxonomic studies confirm that Marshallocereus belongs to the Pachycereinae subtribe, but its relationship with Cephalocereus and Pachycereus is still uncertain (Arias & al. 2003; Arias & Terrazas 2006, 2009). Its distribution is one of the southernmost of Pachycereinae, in the Mesoamerican region (Mexico to Costa Rica). The recognition of more than one species is not resolved.A
A. Arias, S. 2021: Revisions of Acanthocereus, Aporocactus, Astrophytum, Bergerocactus, Cephalocereus, Disocactus, Marshallocereus, Nyctocereus, Pachycereus, Peniocereus, Pereskiopsis, Selenicereus, Stenocereus, Strophocactus – In: Korotkova N. & al., Cactaceae at – a dynamic online species-level taxonomic backbone for the family. – Willdenowia: 251-270