Escontria in Contr. U.S. Natl. Herb. 10: 125. 1906 sec. Hernández & Gómez-Hinostrosa 2011
- Type: Escontria chiotilla
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: Monotypic, endemic to southern Mexico. Sampled by Arias & al. 2005, Bárcenas & al. 2011 and Hernández-Hernández & al. 2011. The latter two studies show E. chiotilla resolved together with Stenocereus species, while Arias & al. found E. chiotilla in a polytomy with Polaskia chichipe, Myrtillocactus and Stenocereus, but not nested in any other genus. So, maintaining Escontria as a separate genus may be justified, but generic limits within that clade need further evaluation.A
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