Rhachidosoraceae

Rhachidosoraceae
Scientific classification
Kingdom:	Plantae
Division:	Pteridophyta
Class:	Polypodiopsida
Order:	Polypodiales
Family:	Rhachidosoraceae X.C.Zhang 2011
Genus & Species
Rhachidosorus Ching 1964 R. mesosorus (Mak.) Ching 1964

Rhachidosoraceae is a family of ferns in the order Polypodiales.^[1] Its only genus is Rhachidosorus, which was described by Ren Chang Ching in 1964, with about 7 species in eastern and southeastern Asia, including Japan, the Philippines, and Sumatra.^[2]

Species

The species of Rhachidosorus, all published, with the genus name, by Ching in Acta Phytotaxonomica Sinica volume 9, number 1 include:^[3]

• Rhachidosorus mesosorus (Makino) Ching 1964 (China, Japan, South Korea)

(=) Diplazium mesosorum (Makino) Koidz. 1924

(=) Athyrium mesosorum (Makino) Makino 1899

(=) Asplenium mesosorum Makino 1898

• Rhachidosorus blotianus Ching 1964 (China, Vietnam)

(=) Athyrium fragile Tardieu 1932 (nom. illeg. hom.)

• Rhachidosorus chrysocarpus (Alderw.) Ching 1964

(=) Diplazium chrysocarpum Alderw. 1914

• Rhachidosorus stramineus (Copel.) Ching 1964

(=) Athyrium stramineum Copel. 1908

• Rhachidosorus pulcher (Tagawa) Ching 1964 (Taiwan, Yunnan)

(=) Diplazium pulchrum Tagawa 1935

• Rhachidosorus consimilis Ching 1964 (Guizhou, Sichuan, Yunnan)
• Rhachidosorus truncatus Ching 1964 (Guangxi, Guizhou, Yunnan)
• Rhachidosorus subfragilis Ching 1964 (Yunnan)

Phylogenic relationships

The following diagram for the eupolypods II, based on Lehtonen, 2011,^[4] and Rothfels & al., 2012,^[5] shows a likely phylogenic relationship between the Rhachidosoraceae and the other families of the eupolypods II clade.

eupolypods II	Cystopteridaceae Rhachidosoraceae Diplaziopsidaceae Aspleniaceae Hemidictyaceae Thelypteridaceae Woodsiaceae Onocleaceae Blechnaceae Athyriaceae

References

1. Alan R. Smith, Kathleen M. Pryer, Eric Schuettpelz, Petra Korall, Harald Schneider & Paul G. Wolf (2006). "A classification for extant ferns" (PDF). Taxon. 55 (3): 705–731. doi:10.2307/25065646.
2. Maarten J. M. Christenhusz, Xian-Chun Zhang & Harald Schneider (2011). "A linear sequence of extant families and genera of lycophytes and ferns" (PDF). Phytotaxa. 19: 7–54.
3. Rhachidosorus Tropicos.org. Missouri Botanical Garden. 04 Feb 2012
4. Samuli Lehtonen (2011). "Towards Resolving the Complete Fern Tree of Life" (PDF). PLoS ONE. 6 (10): e24851. doi:10.1371/journal.pone.0024851. PMC 3192703. PMID 22022365.
5. Carl J. Rothfels; Anders Larsson; Li-Yaung Kuo; Petra Korall; Wen- Liang Chiou; Kathleen M. Pryer (2012). "Overcoming Deep Roots, Fast Rates, and Short Internodes to Resolve the Ancient Rapid Radiation of Eupolypod II Ferns". Systematic Biology. 61 (1): 70. doi:10.1093/sysbio/sys001. PMID 22223449.