Summary
Ceratozamia is a neotropical genus in the Cycadales that is particularly diverse in Mexico. In this genus, most species are endemic to Mexico and most of these species have a restricted distribution pattern. We propose and describe a new species from western Oaxaca State, Mexico, which was previously subsumed under the concept of C. robusta. The circumscription of this new species derived from a review of two associated taxa: C. robusta Miq. and C. leptoceras Mart.-Domínguez, Nic.-Mor., D.W.Stev. & Lorea-Hern. We conducted an extensive review of herbarium specimens, complemented with ex profeso fieldwork, during which we monitored populations in Oaxaca for phenological characterisation. The new species is described and illustrated. This species occurs in a wide distribution range of cloud forest in western Oaxaca. We provide a taxonomic key for all species with morphological and geographical affinity to C. oliversacksii and all species distributed in Oaxaca. The description of C. oliversacksii increases diversity in this cycad genus to six species in Oaxaca. This research highlights the study and monitoring of reproductive structures for robust taxonomic work.
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Acknowledgements
The first author thanks the Consejo Nacional de Ciencia y Tecnología (CONACYT, Mexico) for the award of a PhD scholarship (729810). This research was funded by IAPT research grants awarded in 2020 to the first author; Grant 134960 (CONACYT) and Instituto de Investigaciones Biológicas, Universidad Veracruzana (FNM); Instituto de Biología, Universidad Nacional Autónoma de México (FVS), and NSF Grant BSR-8607049 (DWS). We thank the curators of all consulted herbaria, and the authorities of the Municipalities of Candelaria Loxicha, San Agustín Loxicha and San Miguel del Puerto (Oaxaca) for their support during our fieldwork. We specially thank Damián Reyes, Javier Reyes, Guadalupe Hernández Martínez and Monserrat Ríos Méndez for their assistance during fieldwork and Gerardo Quintos for the botanical illustration.
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Martínez-Domínguez, L., Nicolalde-Morejón, F., Vergara-Silva, F. et al. Ceratozamia oliversacksii (Zamiaceae), a new species of gymnosperm from western Oaxaca, Mexico. Kew Bull 77, 211–219 (2022). https://doi.org/10.1007/s12225-021-09992-x
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DOI: https://doi.org/10.1007/s12225-021-09992-x