Aztekium in Monatsschr. Deutsch. Kakteen-Ges. 1: 52. 1929 sec. Vázquez-Sánchez & al. 2013
- Type: Aztekium ritteri
Category B. The genus is monophyletic based on phylogenetic studies that support the clade based on a sufficiently dense or even complete sampling, or support a monotypic genus as a distinct lineage, but do not provide a new taxonomic treatment at the species level. In many cases, older classical taxonomic synopses or a monographic treatment exist for these genera providing a reliable assessment of the species included.
Phylogenetics: The genus contains only three species; two of them (A. ritteri and A. hintonii Glass & W. A. Fitz Maur.) have been found well supported as sisters to each other (Vázquez-Sánchez & al. 2013).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., Ocampo, G. & Ochoterena, H. 2015: A taxonomic backbone for the global synthesis of species diversity in the angiosperm order Caryophyllales. – Willdenowia 45(3): 281-383