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Castro-Castro, A., Ortiz-Brunel, J.P., Ávila-González, H., Lichter-Marck, I.H., Carrillo-Reyes, P., López-Enríquez, I.L. and Barvosa-Jiménez, M.A. 2023. Spatial richness analysis and an evaluation of extinction risk for the genus Pachyphytum (Crassulaceae), with the description of a new species from Sierra Madre Occidental, Mexico. Phytotaxa. 629, 3 (Dec. 2023), 197–209. DOI:https://doi.org/10.11646/phytotaxa.629.3.2.