Biodiversity Literature Repository
Published December 14, 2021 | Version v1
Taxonomic treatment Open

Dioon Lindley 1843

Creators

  • 1. Institute for Excellence in Educational Innovation, Chiba University, Chiba 263 - 8522, Japan & josesgo @ gmail. com; https: // orcid. org / 0000 - 0003 - 4342 - 6215
  • 2. Herbario Eizi Matuda, Laboratorio de Ecología Evolutiva, Instituto de Ciencias Biológicas, Universidad de Ciencias y Artes de Chiapas, Tuxtla Gutiérrez 29039, Mexico & perezfarreram @ yahoo. com. mx; https: // orcid. org / 0000 - 0002 - 5329 - 1505
  • 3. Ganna Walska Lotusland, Santa Barbara, CA 93108, USA & jeffchemnick @ cox. net; https: // orcid. org / 0000 - 0003 - 0200 - 6062
  • 4. University of California Botanical Garden, Berkeley, CA 94720, USA & cycadtim @ gmail. com; https: // orcid. org / 0000 - 0002 - 9249 - 3791

Description

Key to the Dioon species in the Purpusii clade

Dioon salas-moralesae, Dioon merolae and Dioon oaxacensis belong to the Purpusii clade, as determined in previous phylogenetic studies (Gutiérrez-Ortega et al., 2018b, 2018c; Dorsey et al. 2018). The other species in this clade are Dioon argenteum, Dioon califanoi De Luca & Sabato (1979: 170–172), Dioon caputoi De Luca, Sabato & Vázquez Torres (1980: 44–46), Dioon holmgrenii (1981b: 552–554), Dioon planifolium, and Dioon purpusii Rose (1909: 260– 261). A key for the species of the Purpusii clade is here provided.

1a. Leaves green when emerging .............................................................................................................................................................2

1b. Leaves silver when emerging ......................................................................................................................................... D. argenteum

2a. Leaflets strongly curved downward in the apical portion .................................................................................................. D. merolae

2b. Leaflets not or slightly curved downward in the apical portion.........................................................................................................3

3a. Leaflets strongly imbricated...............................................................................................................................................................4 3b. Leaflets not imbricated.......................................................................................................................................................................6

4a. Leaflets inserted obliquely on the rachis, leaf strongly keeled ......................................................................................... D. califanoi

4b. Leaflets not obliquely inserted on the rachis......................................................................................................................................5

5a. Leaflets flat, leaf frequently moderately keeled............................................................................................................ D. oaxacensis

5b. Leaflets slightly curved downward in the apical portion ...................................................................................... D. salas-moralesae

6a. Leaves moderately keeled ................................................................................................................................................. D. purpusii

6b. Leaves not keeled ...............................................................................................................................................................................7

7a. Leaflets 4–5 mm wide, widely spaced along the rachis ...................................................................................................... D. caputoi

7b. Leaflets> 5 mm wide, slightly spaced along the rachis......................................................................................................................8

8a. Leaflets with 3–4 long spines on the upper margin and slightly decurved ................................................................... D. holmgrenii

8b. Leaflets flat with 0–2 long spines on the upper margin ............................................................................................... D. planifolium

Notes

Published as part of Gutiérrez-Ortega, José Said, Pérez-Farrera, Miguel Angel, Chemnick, Jeffrey & Gregory, Timothy J., 2021, A reassessment of Dioon merolae (Zamiaceae) leads to the description of Dioon salas-moralesae, a new cycad species from Southeastern Oaxaca, Mexico, pp. 93-110 in Phytotaxa 528 (2) on pages 104-105, DOI: 10.11646/phytotaxa.528.2.3, http://zenodo.org/record/5778682

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Linked records

Additional details

Identifiers

URL
http://treatment.plazi.org/id/2A13879BFFCBFF8F15A5B990FA2A5185

Is part of
Journal article: 10.11646/phytotaxa.528.2.3 (DOI)
Journal article: http://zenodo.org/record/5778682 (URL)
Journal article: http://publication.plazi.org/id/D62AFFE3FFC0FF83152DBF16FF815051 (URL)
Is source of
https://biodiversitypmc.sibils.org/collections/plazi/2A13879BFFCBFF8F15A5B990FA2A5185 (URL)
https://www.gbif.org/species/191563984 (URL)
https://www.checklistbank.org/dataset/2966/taxon/2A13879BFFCBFF8F15A5B990FA2A5185.taxon (URL)

Biodiversity

Family
Zamiaceae
Genus
Dioon
Kingdom
Plantae
Order
Cycadales
Phylum
Tracheophyta
Scientific name authorship
Lindley
Taxon rank
genus
Taxonomic concept label
Dioon Lindley, 1843 sec. Gutiérrez-Ortega, Pérez-Farrera, Chemnick & Gregory, 2021

References

  • Gutierrez-Ortega, J. S., Salinas-Rodriguez, M. M., Martinez, J. F., Molina-Freaner, F., Perez-Farrera, M. A., Vovides, A. P., Matsuki, Y., Suyama, Y., Ohsawa, T. A., Watano, Y. & Kajita, T. (2018 b) 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 / mcx 165
  • Gutierrez-Ortega, J. S., Yamamoto, T., Vovides, A. P., Perez-Farrera, M. A., Martinez, J. F., Molina-Freaner, F., Watano, Y. & Kajita, T. (2018 c) 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 / mcx 123
  • Dorsey, B. L., Gregory, T. J., Sass, C. & Specht, C. D. (2018) Pleistocene diversification in an ancient lineage: a role for glacial cycles in the evolutionary history of Dioon Lindl. (Zamiaceae). American Journal of Botany 105 (9): 1512 - 1530. https: // doi. org / 10.1002 / ajb 2.1149
  • 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., Sabato, S. & Vazquez Torres, M. (1980) Dioon caputoi (Zamiaceae), a new species from Mexico. Brittonia 32: 43 - 46. https: // doi. org / 10.2307 / 2806216
  • Rose, J. N. (1909) Studies of Mexican and Central American plants Vol. 12, No. 6. pp. 260 - 261.