Aylostera Speg. in Anales Soc. Ci. Argent. 96: 75. 1923 sec. Ritz & al. 2016


The phylogenetic relationships in Aylostera were studied in details by Ritz et al. (2016) based on the plastid DNA regions atpB-rbcL and trnS-trnG as well as AFLPs and morphological characters. Aylostera was confirmed as monophyletic and as distantly related to the clade that contains the type species of Rebutia, thus justifying recognizing Aylostera as a separate genus. Based on their results, the authors suggested a new classification of Aylostera with nine species, this classification is followed here. [editiorial]

Archived Note

See notes under Rebutia. According to the molecular phylogenetic study of Mosti & al. (2011), Aylostera falls in two clades, Aylostera s.str. and Mediolobivia (incl. A. einsteinii (Frič ex Kreuz. & Buining) Mosti & Papini), recognized as subgenera by these authors. The genus is an excellent example for the notorious oversplitting prevalent in many cacti - Hunt (2006) (as Rebutia subg. Rebutia) accepts ten species, while Mosti & al. (2011) argue for 110 species.A
A. Hernández-Ledesma, P., Berendsohn, W.G., Borsch, T., von Mering, S., Akhani, H., Arias, S., Castañeda-Noa, I., Eggli, U., Eriksson, R., Flores-Olvera, H., Fuentes-Bazán, S., Kadereit, G., Klak, C., Korotkova, N. & Nyffeler, R. 2015: A taxonomic backbone for the global synthesis of species diversity in the angiosperm order Caryophyllales. – Willdenowia 45(3): 281-383