Strophocactus Britton & Rose in Contr. U.S. Natl. Herb. 16: 262. 1913 sec. Korotkova, N., Borsch, T. & Arias, S., 2017



Phylogenetics: Strophocactus was originally established as a monotypic genus (Britton & Rose 1913: 262) and remained in this circumscription until Hunt (1989, Bradleya 7: 89–96) transferred Strophocactus to Selenicereus. The reinstatement of Strophocactus with three species previously placed in Selenicereus was suggested by Bauer (2003) and adapted by Hunt (2006). Korotkova et al. (2017), based on plastid trnK/matK, rpl16 intron and trL-F, found Strophocactus sensu Bauer (2003) as polyphyletic; its nomenclatural type S. wittii was found nested within Pseudoacanthocereus, as sister to P. sicariguensis while Strophocactus (=Deamia) testudo and S. chontalensis formed a highly-supported sister to the subtribe Pachycereinae. Based on these results, Korotkova et al. (2017) newly circumscribed Strophocactus to include Pseudoacanthocereus and reinstated Deamia. [Editorial]