Korotkova N., Borsch T., Arias S., A phylogenetic framework for the Hylocereeae (Cactaceae) and implications for the circumscription of the genera, Phytotaxa, 2017, 327(1):1-46, doi: 10.11646/phytotaxa.327.1.1
An analysis of four plastid DNA regions covers a broad sample of Hylocereeae and comparative groups. The findings support changes in several generic circumscriptions, separation of Deamia and the union of two Pseudoacanthocereus species with Strophocactus wittii. The paper includes comparisons of stems, roots, flowers and fruits, and the new combinations Strophocactus brasiliensis and S. sicariguensis.