Micropuntia in Amer. Midl. Naturalist 36: 661. 1946 sec. Majure & al. 2019
- ≡Grusonia subg. Micropuntia in Succ. Pl. Res. 6: 48. 2002 syn. sec. Majure & al. 2019
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.