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Gutiérrez-Ortega, J.S., Pérez-Farrera, M.A., Vovides, A.P., Chávez-Cortázar, A., López, S., Santos-Hernández, N.G. and Ruíz-Roblero, S.K. 2021. Ceratozamia sanchezae (Zamiaceae): a new cycad species from Chiapas Highlands (Mexico). Phytotaxa. 500, 3 (May 2021), 201–216. DOI:https://doi.org/10.11646/phytotaxa.500.3.4.