Rapicactus

Primary tabs

Rapicactus

Rapicactus Buxb. & Oehme in Cactaceae (Berlin) 1942(1): 24. 1942 sec. Vázquez-Sánchez & al. 2019

Acknowledgments

Revised by David Aquino

Taxon standing

A: phylogeny-based synopsisA

Notes

Phylogenetics: Traditionally included in Turbinicarpus, separated from it by Vázquez-Sánchez & al. (2013) after Turbinicarpus was found to be polyphyletic by them and previously also by Bárcenas & al. (2011). Subsequent evidence indicated that Rapicactus was an independent lineage of Turbinicarpus s.s. The presence of concentric druses in the hypodermis is a feature present in the members of Rapicactus (De la Rosa-Tilapa et al. 2018). Vázquez-Sánchez et al. (2019) performed a phylogenetic study that included five molecular markers (matK, rbcL, psbA-trnH, rpl16 and trnL-F) and anatomical characters. Rapicactus was recovered as monophyletic with maximal support as sister to Acharagma, Lophophora and Obregonia. In conclusion, Rapicactus is a lineage independent from Turbinicarpus s.s. Five species and four subspecies are recognized, of which Rapicactus beguini is the species with the greatest morphological variation (See treatment).B

Bibliography

A. Korotkova, N., Aquino, D., Arias, S., Eggli, U., Franck, A.R., Gómez-Hinostrosa, C., Guerrero, P.C., Hernández, H.M., Kohlbecker, A., Köhler, M., Luther, K., Majure, L.C., Metzing, D., Müller, A., Nyffeler, R., Sánchez, D., Schlumpberger, B.O. & Berendsohn, W. G. 2021: Cactaceae at Caryophyllales.org – a dynamic online species-level taxonomic backbone for the family. – Willdenowia 51: 251-270
B. Aquino, D. 2021: Revisions of Epithelantha, Kadenicarpus, Rapicactus, Turbinicarpus – In: Korotkova N. & al., Cactaceae at Caryophyllales.org – a dynamic online species-level taxonomic backbone for the family. – Willdenowia 51: 251-270