Rapicactus
Rapicactus in Cactaceae (Berlin) 1942(1): 24. 1942 sec. Vázquez-Sánchez & al. 2019
- –Turbinicarpus subg. Rapicactus, Gen. Turbinicarpus: 93 (10). 2004, nom. inval., syn. sec. Aquino 2021
- Type: Rapicactus subterraneus
- =Lodia in Bradleya 18: 44. 2000 syn. sec. Aquino 2021
- Type: Lodia mandragora
Taxon standing
Category A: The genus is monophyletic based on a complete or very comprehensive phylogenetic study, and a phylogeny-based taxonomic synopsis was published.A
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