Hemidictyaceae

Hemidictyaceae
Scientific classification
Kingdom: Plantae
Division: Pteridophyta
Class: Polypodiopsida
Order: Polypodiales
Family: Hemidictyaceae
Christenh. & H. Schneider. 2011
Genus & Species

Hemidictyum C.Presl 1836

  • H. marginatum (L.) C.Presl

Hemidictyaceae is a family of ferns in the order Polypodiales.[1] Its sole genus is Hemidictyum C.Presl 1836, commonly known as the "marginated half net fern."[2] Hemidictyaceae is considered to be a sister family to Aspleniaceae, believed to have diverged during the Cretaceous period.[3][4]

The name Hemidictyum was derived from the terms hemi (half) and diktyon (net), from the veins being netted only half-way across the pinnules.[5]

Distribution

Hemidictyum is a native neotropical fern, found in Mexico, the Caribbean, Costa Rica, Guatemala, Honduras, Nicaragua, Panama, French Guiana, Suriname, Brazil, Venezuela, Puerto Rico, Bolivia, Colombia, Ecuador, and Peru.[2][6]

Species

There is currently only one accepted Hemidictyum species name (H. marginatum). The other names are considered to be synonyms, either of that species, or of accepted Asplenium species:[7]

(=) Asplenium marginatum L. 1753
(=) Asplenium limbatum Willd 1810 (nom. illeg superfl.)
(=) Diplazium marginatum Blume 1828
(=) Hemidictyum limbatum (Willd.) C.Presl 1851
(=) Diplazium marginatum (L.) Diels 1899 (nom. illeg)
(=) Diplazium limbatum (Willd.) Proctor 1966 (comb. superfl.)
Asplenium purdieanum Hook 1854
Asplenium finlaysonianum Wall. ex Hook 1854

Phylogenic relationships

The following diagram for the eupolypods II, based on Lehtonen, 2011,[8] and Rothfels & al., 2012,[9] shows a likely phylogenic relationship between the Hemidictyaceae 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". Taxon 55 (3): 705–731. doi:10.2307/25065646.
  2. 2.0 2.1 Hemidictyum marginatum, USDA Natural Resources Conservation Service PLANTS Profile, 4 Feb 2012
  3. Maarten J. M. Christenhusz, Xian-Chun Zhang & Harald Schneider (2011). "A linear sequence of extant families and genera of lycophytes and ferns". Phytotaxa 19: 7–54.
  4. Maarten J. M. Christenhusz & Harald Schneider (2011). "Corrections to Phytotaxa 19: Linear sequence of lycophytes and ferns". Phytotaxa 28: 50–52.
  5. The Fern Manual, being a description of all the best stove, greenhouse and hardy ferns by contributors to the Journal of Horticulture p.69, London, 1863
  6. Hemidictyum marginatum USDA-ARS Germplasm Resources Information Network (GRIN) 25 Jul 2002
  7. Hemidictyum Tropicos.org. Missouri Botanical Garden. 04 Feb 2012
  8. Samuli Lehtonen (2011). "Towards Resolving the Complete Fern Tree of Life". PLoS ONE 6 (10): e24851. doi:10.1371/journal.pone.0024851. PMC 3192703. PMID 22022365.
  9. 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.