Tephrocactus
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Phylogenetics: Tephrocactus was confirmed as monophyletic by Ritz & al. (2012), and recently revised based on a phylogenetic study (Las Peñas & al. 2019). It is strongly supported within tribe Tephrocacteae (Köhler & al. 2020).
Key literature: Monographs by Kiesling (1984) and Gilmer & Thomas (1998).A
A. Köhler, M. 2021: Revisions of Airampoa, Brasiliopuntia, Opuntia, Salmonopuntia, Tacinga. – In: Korotkova N. & al., Cactaceae at Caryophyllales.org – a dynamic online species-level taxonomic backbone for the family. – Willdenowia 51(2): 250-270
Key literature: Monographs by Kiesling (1984) and Gilmer & Thomas (1998).A