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Stangeriaceae

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Stangeriaceae
Stangeria eriopus in coastal lowland forest,
South Africa
Scientific classification Edit this classification
Kingdom: Plantae
Clade: Tracheophytes
Clade: Gymnospermae
Division: Cycadophyta
Class: Cycadopsida
Order: Cycadales
Suborder: Zamiineae
Family: Stangeriaceae
Schimp. & Schenk
Genera

Stangeriaceae is the smallest family of the cycads, including only two extant genera, Stangeria and Bowenia.

Taxonomy

Although the family was first published by Schimper and Schenk as Stangerieae, the name Stangeriaceae was used by Johnson (who was unaware of previous uses) to include only the genus Stangeria. Later, Stevenson expanded the family to include Bowenia. This decision was based on some shared characters (synapomorphies) such as the presence of fused vacularized stipules, the lack or irregular production of cataphylls, and a few other anatomical and morphological traits. Later molecular evidence suggested that the two genera of the Stangeriaceae belonged in different positions within the Zamiaceae, thus leading other authors to propose dissolving the family.

Genera

Distribution

The genus Stangeria occurs in South Africa, in the Kwa-Zulu Natal and Eastern Cape regions, while both species of Bowenia occur in Queensland, Australia.

References

  1. Metcalf Collection (North Carolina State University).; Schenk, August; Schimper, Wilhelm Philip; Scudder, Samuel Hubbard; Zittel, Karl Alfred von (1880). Handbuch der palaeontologie. Unter mitwirkung von W. Ph. Schimper; hrsg. von Karl A. Zittel. München: R. Oldenbourg. doi:10.5962/bhl.title.34265.
  2. Johnson, L A S; Johnson, L. A. S. (1959). "The families of cycads and the Zamiaceae of Australia". Proceedings of the Linnean Society of New South Wales. 84: 64–117.
  3. Stevenson, Dennis Wm. (1990-03-07). "Morphology and Systematics of the Cycadales". The Biology, Structure, and Systematics of the Cycadales: Proceedings of the Symposium CYCAD 87. The New York Botanical Garden Press: 8–55. doi:10.21135/893273507.003. ISBN 978-0-89327-350-7.
  4. ^ Stevenson, Dennis WM. (1992-04-01). "A formal classification of the extant cycads". Brittonia. 44 (2): 220–223. doi:10.2307/2806837. ISSN 1938-436X. JSTOR 2806837. S2CID 41438950.
  5. Salas-Leiva, Dayana E.; Meerow, Alan W.; Calonje, Michael; Griffith, M. Patrick; Francisco-Ortega, Javier; Nakamura, Kyoko; Stevenson, Dennis W.; Lewis, Carl E.; Namoff, Sandra (2013-11-01). "Phylogeny of the cycads based on multiple single-copy nuclear genes: congruence of concatenated parsimony, likelihood and species tree inference methods". Annals of Botany. 112 (7): 1263–1278. doi:10.1093/aob/mct192. ISSN 0305-7364. PMC 3806525. PMID 23997230.
  6. Rai, Hardeep S.; O’Brien, Heath E.; Reeves, Patrick A.; Olmstead, Richard G.; Graham, Sean W. (2003-11-01). "Inference of higher-order relationships in the cycads from a large chloroplast data set". Molecular Phylogenetics and Evolution. 29 (2): 350–359. doi:10.1016/S1055-7903(03)00131-3. ISSN 1055-7903. PMID 13678689.
  7. Chaw, Shu-Miaw; Walters, Terrence W.; Chang, Chien-Chang; Hu, Shu-Hsuan; Chen, Shin-Hsiao (2005-10-01). "A phylogeny of cycads (Cycadales) inferred from chloroplast matK gene, trnK intron, and nuclear rDNA ITS region". Molecular Phylogenetics and Evolution. 37 (1): 214–234. doi:10.1016/j.ympev.2005.01.006. ISSN 1055-7903. PMID 16182153.
  8. Christenhusz, M. J. M.; Reveal, J. L.; Farjon, A.; Gardner, M. F.; Mill, R. R.; Chase, M. W. (2011-02-18). "A new classification and linear sequence of extant gymnosperms". Phytotaxa. 19 (1): 55. doi:10.11646/phytotaxa.19.1.3. ISSN 1179-3163.
Taxon identifiers
Stangeriaceae
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