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| Ceratozamia schiblii Pérez-Farr. & Gut.Ortega, in Pérez-Farrera, Gutiérrez-Ortega, Gregory, Chemnick, Salas-Morales, Calonje et Díaz-Jiménez, 2022. |
Abstract
Ceratozamia schiblii (Zamiaceae), a new species endemic to the highlands of eastern Oaxaca, Mexico, is described. The new species is part of the C. robusta species complex, which is a group of closely related species with very similar morphology. Among them, the new species can be distinguished by its brown leaflets in emerging leaves, a very long peduncle in seed cones, and the green color of mature pollen cones. Compared with the other species in the C. robusta species complex, C. schiblii has one of the longest rachides, and the highest number of leaflet pairs. The recognition of C. schiblii apparently resolves the total number of species within the C. robusta species complex. The region where C. schiblii populations occur coincides with the Neogene refugia areas of the Neotropical flora, which adds evidence to the importance of the mountain systems from Oaxaca and Chiapas, Mexico, in the diversification history of cycads.
Keywords: cycads; floristic refugia; Mesoamerica; morphological analyses; species complex
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| Ceratozamia schiblii sp. nov. in habitat. (A) Adult plants. (B) Erect leaves and details of leaflets. (C) Seedlings. |
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| Some of the distinctive features of Ceratozamia schiblii sp. nov. (A) Leaves are one of the longest and with the highest number of leaflet pairs among the species of the C. robusta species complex (left: M. Calonje; right, M.A. Pérez Farrera). (B) Megastrobili (seed cones) are pendulous and peduncles long. (C) Emerging leaves are of brown color. Photo A by Cesar Daniel Coutiño Ovando. Photos B and C by Miguel Angel Pérez Farrera. |
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| Ceratozamia schiblii sp. nov. Megastrobilus (seed cone) of Ceratozamia schiblii. (A) Lateral view (scale = 10 cm); (B) view from above (scale = 5 cm), (C) view from below (scale = 5 cm). Microstrobilus of Ceratozamia schiblii at near pollen dehiscence phase. (A) Lateral view (scale = 10 cm); (B) view from above (scale = 2 cm), (C) view from below (scale = 2 cm). Photos by José García González. |
Ceratozamia schiblii Pérez-Farr. & Gut.Ortega sp. nov.
Etymology: The specific epithet was chosen to honor Leo Schibli (1958–2004), a founding member of Sociedad para el Estudio de los Recursos Bióticos de Oaxaca, Asociación Civil (SERBO, A.C.). His field explorations and specimen collections in Oaxaca resulted in the discovery of several new cycad species.
Miguel Angel Pérez-Farrera, José Said Gutiérrez-Ortega, Timothy J. Gregory, Jeffrey Chemnick, Silvia Salas-Morales, Michael Calonje and Pedro Díaz-Jiménez. 2022. Ceratozamia schiblii (Zamiaceae): A New Cycad Species from the Eastern Mountains of Oaxaca, Mexico. Taxonomy. 2(3), 324-338. DOI: doi.org/10.3390/taxonomy2030025 [27 July 2022]
