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DOI: http://dx.doi.org/10.11646/phytotaxa.369.2.4

Species definition of Dioon sonorense (Zamiaceae, Cycadales), and description of D. vovidesii, a new cycad species from northwestern Mexico 

JOSÉ SAID GUTIÉRREZ-ORTEGA, KAREN JIMÉNEZ-CEDILLO, MIGUEL ANGEL PÉREZ-FARRERA, JOSÉ F. MARTÍNEZ, FRANCISCO MOLINA-FREANER, YASUYUKI WATANO, TADASHI KAJITA

Abstract


The cycad genus Dioon (Zamiaceae) was described by J. Lindley in the 19th century, but most species were discovered during the late 1970s through the mid-1980s. Despite recent efforts to clarify the actual species diversity within the genus, the definition of some species is still problematic. The northernmost populations of the cycad genus Dioon in northwestern Mexico are currently recognised as Dioon sonorense, but important variation among populations has been suggested by multiple authors, and the definition of what is D. sonorense remains unclear. Documented evidence on leaf and leaflet morphology, cuticular and epidermal anatomy, and population genetics across the populations of D. sonorense, as currently circumscribed, suggest that the taxon contains two biological units that should be taxonomically distinguished, given their importance for systematics and conservation. Here we highlight that 1) D. sonorense is defined by the variation exhibited only in populations from southern Sonora and northern Sinaloa, Mexico; 2) the northernmost populations of Dioon in northwestern Mexico represent a new taxon that we describe as Dioon vovidesii. We also discuss the implications of this reassessment for cycad systematics and conservation.


Keywords


aridification, endangered species, MIG-seq, narrow endemic, Sonoran Desert, species delimitation, Gymnosperms

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References


Bentham, G. (1844) The botany of the voyage of HMS Sulphur, under command of Captain Sir Edward Belcher, during the years 1836–42. London: Smith, Elder.

Britton, N.L. & Rose, J.N. (1923) The Cactaceae. Descriptions and illustrations of plants of the cactus family Vol. 4. Washington, USA: The Carnegie Institution of Washington.

Calonje, M., Stevenson, D.W. & Stanberg, L. (2018) The World List of Cycads, online edition. Available from: http://www.cycadlist.org/ (accessed 27 May 2018)

Chemnick, J. & Gregory, T. (2010) Dioon sonorense. The IUCN Red List of Threatened Species 2010: e.T42130A10661262.

https://doi.org/10.2305/IUCN.UK.2010-3.RLTS.T42130A10661262.en

Chemnick, J., Gregory, T.J. & Salas Morales, S. (1997) A revision of Dioon tomasellii (Zamiaceae) from western Mexico, a range extension of D. merolae, and clarification of D. purpusii. Phytologia 83: 1–6.

De Luca, P. & Sabato, S. (1979) Dioon califanoi (Zamiaceae), a new species from Mexico. Brittonia 31: 170–173.

https://doi.org/10.2307/2806693

De Luca, P., Moretti, A., Sabato, S. & Torres, M.V. (1980a) Dioon rzedowskii (Zamiaceae), a new species from Mexico. Brittonia 32: 225–229.

https://doi.org/10.2307/2806794

De Luca, P., Sabato, S. & Torres, M.V. (1980b) Dioon caputoi (Zamiaceae), a new species from Mexico. Brittonia 32: 43–46.

https://doi.org/10.2307/2806216

De Luca, P., Sabato, S. & Torres, M.V. (1981a) Dioon merolae (Zamiaceae), a new species from Mexico. Brittonia 33: 179–185.

https://doi.org/10.2307/2806317

De Luca, P., Sabato, S. & Torres, M.V. (1981b) Dioon holmgrenii (Zamiaceae), a new species from Mexico. Brittonia 33: 552–555.

https://doi.org/10.2307/2806763

De Luca, P., Sabato, S. & Torres, M.V. (1982) Distribution and variation of Dion edule (Zamiaceae). Brittonia 34: 355–362.

https://doi.org/10.2307/2806710

De Luca, P., Sabato, S. & Torres, M.V. (1984) Dion tomasellii (Zamiaceae), a new species with two varieties from western Mexico. Brittonia 36: 223–227.

https://doi.org/10.2307/2806511

Eichler, A.W. (1883) Ein neues Dioon. Gartenflora. Zeitung, Berlin, pp. 411–413, 438–439.

Engler, A. (1880) Diagnosen neuer Burseraceae und Anacardiaceae. Botanische Jahrbücher für Systematik, Pflanzengeschichte und Pflanzengeographie 1: 41–47.

García, E. (2004) Modificaciones al sistema de clasificación climática de Köppen. UNAM, Mexico, D.F. 90 pp.

Gentry, H.S. (1942) Rio Mayo plants, a study of the flora and vegetation of the valley of the Rio Mayo, Sonora. Carnegie Institution of Washington, Publication 527. Washington, USA: The Carnegie Institution of Washington.

González-Astorga, J., Vovides, A.P. & Iglesias, C. (2003a) Morphological and geographic variation of the cycad Dioon edule Lindl. (Zamiaceae): ecological and evolutionary implications. Botanical Journal of the Linnean Society 141: 465–470.

https://doi.org/10.1046/j.1095-8339.2003.00155.x

González-Astorga, J., Vovides, A.P., Ferrer, M.M. & Iglesias, C. (2003b) Population genetics of Dioon edule Lindl. (Zamiaceae, Cycadales): biogeographical and evolutionary implications. Biological Journal of the Linnean Society 80: 457–467.

https://doi.org/10.1046/j.1095-8312.2003.00257.x

Gray, A. (1855) Plantae Novae Thurberianae: the characters of some new genera and species of plants in a collection made by George Thurber, Esq., of the late Mexican boundary commission, chiefly in New Mexico and Sonora. Memoirs of the American Academy of Arts and Sciences 5: 297–328.

https://doi.org/10.2307/25058183

Greenman, J.M. (1903) New and otherwise noteworthy angiosperms from Mexico and Central America. In: Proceedings of the American Academy of Arts and Sciences. Vol. 39, No. 5. Cambridge, USA: Harvard University Press, pp. 69–120.

Gregory, T.J., Chemnick, J., Salas-Morales, S. & Vovides, A.P. (2003) A new species in the genus Dioon (Zamiaceae) from north-central Oaxaca, Mexico. Botanical Journal of the Linnean Society 141: 471–476.

https://doi.org/10.1046/j.1095-8339.2003.t01-1-00151.x

Gutiérrez-Ortega, J.S., Kajita, T. & Molina-Freaner, F.E. (2014) Conservation genetics of an endangered cycad, Dioon sonorense (Zamiaceae): implications from variation of chloroplast DNA. Botanical Sciences 92: 441–451.

https://doi.org/10.17129/botsci.112

Gutiérrez-Ortega, J.S., Salinas-Rodríguez, M.M., Martínez, J.F., Molina-Freaner, F., Pérez-Farrera, M.A., Vovides, A.P., Matsuki, Y.,Suyama, Y., Ohsawa, T.A., Watano, Y. & Kajita, T. (2018a) The phylogeography of the cycad genus Dioon (Zamiaceae) clarifies its Cenozoic expansion and diversification in the Mexican transition zone. Annals of Botany 121 (3): 535–548.

https://doi.org/10.1093/aob/mcx165

Gutiérrez-Ortega, J.S., Yamamoto, T., Vovides, A.P., Pérez-Farrera, M.A., Martínez, J.F., Molina-Freaner, F., Watano, Y. & Kajita, T. (2018b) Aridification as a driver of biodiversity: A case study for the cycad genus Dioon (Zamiaceae). Annals of Botany 121 (1): 47–60.

https://doi.org/10.1093/aob/mcx123

Gutiérrez-Ortega, J.S., Jiménez-Cedillo, K., Pérez-Farrera, M.A., Vovides, A.P., Martínez, J.F., Molina-Freaner, F., Imai, R., Tsuda, Y., Matsuki, Y.,Suyama, Y., Watano, Y. & Kajita, T. (2018c) Considering evolutionary processes in cycad conservation: identification of evolutionarily significant units within Dioon sonorense (Zamiaceae) in northwestern Mexico. Conservation Genetics.

https://doi.org/10.1007/s10592-018-1079-2

Haworth, A.H. (1812) Synopsis plantarum succulentarum. R. Taylor & Co., London.

Kearney, T.H.Jr. (1894) Erythrina flabelliformis Kearney. In: Britton, N.L. & Kearney, T.H. (Eds.) An enumeration of the plants collected by Dr. Timothy E. Wilcox, U.S.A, and others in southwestern Arizona during the years 1892–1894. Transactions of the New York Academy of Sciences 14: 21–44.

Liebmann, F.M. (1854) Overs. Danske Vidensk. Selsk. Forhandl. Medlemmers Arbeider.

Lindley, J. (1843) Dion edule. Edward’s botanical register (Vol. 29). James Ridgeway, London, pp. 59–60.

Lundell, C.L. (1940) Studies of tropical American plants-I. In: Contributions from the University of Michigan herbarium 4. Ann Arbor, Michigan: University of Michigan Press.

Miquel, F.A.W. (1847) Tijdschr. Wis-Natuurk. Wetensch. Eerste Kl. Kon. Ned. Inst. Wetensch. 1: 37–38.

Nash, G.V. (1903) A revision of the family Fouquieriaceae. Bulletin of the Torrey Botanical Club 30: 449–459.

https://doi.org/ 10.2307/2478732

Nicolalde-Morejón, F., Vergara-Silva, F., González-Astorga, J., Vovides, A.P. & de los Monteros, A.E. (2009) Reciprocal illumination of morphological characters upon a molecular hypothesis supports the proposal of a new species of cycad from Mexico. Systematics and Biodiversity 7: 73–79.

https://doi.org/10.1017/S1477200008002879

Pérez-Farrera, M.A., Vovides, A.P., Ruiz-Castillejos, C., Galicia, S., Cibrián-Jaramillo, A. & López, S. (2016) Anatomy and morphology suggest a hybrid origin of Zamia katzeriana (Zamiaceae). Phytotaxa 270 (3): 161–181.

https://doi.org/10.11646/phytotaxa.270.3.1

Pérez-Farrera, M.A., Vovides, A.P. & Avendaño S. (2014) Morphology and leaflet anatomy of the Ceratozamia norstogii (Zamiaceae, Cycadales) species complex in Mexico with comments on relationships and speciation. International Journal of Plant Sciences 175 (1): 110–121.

https://doi.org/10.1086/673537

Pritchard, J.K., Wen, X. & Falush, D. (2010) Documentation for structure software: Version 2.3. Chicago, USA: University of Chicago.

Rose, J.N. (1905) Studies of Mexican and Central American plants Vol. 8, No. 4: 281–339.

Rose, J.N. (1909) Studies of Mexican and Central American plants Vol. 12, No. 6: 260–261.

Rzedowski, J. & Huerta, L. (1978) Vegetación de México (Vol. 432). Mexico: Limusa.

Sabato, S. & De Luca, P. (1985) Evolutionary trends in Dion (Zamiaceae). American Journal of Botany 72: 1353–1363.

https://doi.org/10.2307/2443507

Salas-Morales, S.H., Chemnick, J. & Gregory, T.J. (2016) A new cycad species in the genus Dioon (Zamiaceae) from the Mixteca Region of Oaxaca, Mexico. Cactus and Succulent Journal 88: 35–42.

https://doi.org/10.2985/015.088.0104

Standley, P.C. & Williams, L.O. (1951) Dioon mejiae, a new cycad from Honduras. Ceiba 1: 36–38.

Suyama, Y. & Matsuki, Y. (2015) MIG-seq: an effective PCR-based method for genome-wide single-nucleotide polymorphism genotyping using the next-generation sequencing platform. Scientific Reports 5.

https://doi.org/10.1038/srep16963

Torrey, J. (1853) Botany. In: Sitgreaves, L. (Ed.) Report of an expedition down the Zuni and Colorado Rivers. Washington, U.S.A: Robert Armstrong, Public Printer.

Trelease, W. (1924) The American oaks. Memoirs of the National Academy of Sciences 20: 1–255.

https://doi.org/10.5962/bhl.title.142965

Turner, B.L. & Barkley, T.M. (1989) New species, names and combinations in Senecio, sect. Palmatinervii (Asteraceae). Phytologia 67: 390–393.

https://doi.org/10.5962/bhl.part.9106

Vovides, A.P., Clugston, J.A.R., Gutiérrez-Ortega, J.S., Pérez-Farrera, M.A., Sánchez-Tinoco, M.Y. & Galicia. S. (2018) Epidermal morphology and leaflet anatomy of Dioon (Zamiaceae) with comments on climate and environment. Flora 239: 20–44.

https://doi.org/10.1016/j.flora.2017.11.002

Vovides, A.P., Stevenson, D.Wm., Pérez-Farrera, M.A., López, S. & Avendaño, S. (2016) What is Ceratozamia mexicana (Zamiaceae)? Botanical Sciences 94 (2): 419–429.

https://doi.org/10.17129/botsci.449

Vovides, A.P., Avendaño, S., Pérez-Farrera, M.A. & Stevenson, D.Wm. (2012) What is Ceratozamia brevifrons (Zamiaceae)? Brittonia 64 (1): 35–42.

https://doi.org/10.1007/s12228-011-9199-8

Walters, T., Osborne, R. & Decker, D. (2004) We hold these truths In: Walters, T. & Osborne, R. (Eds.) Cycad classification: concepts and recommendations. Cambridge: CABI Publishing, pp. 1–11.

https://doi.org/10.1079/9780851997414.0001

Watson, S. (1879) Contributions to American botany: Revision of the North American Liliaceae; Descriptions of some new species of North American plants. Proceedings of the American Academy of Arts and Sciences 14: 213–303.

https://doi.org/ 10.2307/25138538

Watson, S. (1889) Contributions to American botany. Proceedings of the American Academy of Arts and Sciences 24: 36–87.

https://doi.org/10.2307/20021550

Whitelock, L.M. (2002) The cycads. Portland, U.S.A.: Timber Press.

Wood, C.E. (1949) The American barbistyled species of Tephrosia (Leguminosae). Contributions from the Gray Herbarium of Harvard University 170: 193–384.


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