Guerrero P. C., Walter H. E., Arroyo M. T. K., Peña C. M., Tamburrino I., De Benedictis M., Larridon I., Molecular phylogeny of the large South American genus Eriosyce (Notocacteae, Cactaceae): Generic delimitation and proposed changes in infrageneric and species ranks, Taxon, 2019, 68(3):557-573, doi: 10.1002/tax.12066
An analysis of four plastid markers and one nuclear marker includes 63 Eriosyce taxa and 19 outgroup representatives. The authors evaluate generic limits and internal classification, identify disagreements between previous morphological treatments and relationships, and propose nomenclatural changes. Seven principal clades receive varying levels of support.