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Eulychnia Phil., Fl. Atacam: 23. 1860 sec. Larridon & al. 2018


Revised by Pablo C. Guerrero


Phylogenetics: Species boundaries and infrageneric relationships in Eulychnia have recently been comprehensively studied using six chloroplast markers (rpl32-trnL, trnH-psbA, trnL-trnF, trnQ-rps16, trnS-trnG, and ycf1) and a sampling covering the distribution range (Larridon & al. 2018). Eulychnia was confirmed as monophyletic and two major clades were retrieved in the molecular phylogenetic hypotheses, a northern clade and a southern clade, which both can also easily be distinguished morphologically. The results also supported accepting three further species E. ritteri, E. chorosensis and E. taltalensis, together with the recognition of the new species E. vallenarensis.
Key literature: Monograph by Hoffmann & Walter (2005).A

Taxon standing

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.


A. Guerrero, P.C. 2021: Revisions of Eriosyce, Eulychnia, Copiapoa, Rimacactus. – In: Korotkova N. & al., Cactaceae at – a dynamic online species-level taxonomic backbone for the family. – Willdenowia 51: 2051-270