Horneophytopsida
This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "Horneophytopsida".

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Horneophytopsida
Fossil range: Late Silurian to Early Devonian[1]
Scientific classification
Kingdom: Plantae
Division: unassigned
Class: Horneophytopsida †

Horneophytopsida is a class of early vascular plants including the genera Caia, Tortilicaulis, and Horneophyton. Although formerly classified among the Rhyniophyta, the group is distinctive for having branched sporangia, and lacking true xylem.[1]

Cladogram of the land plants showing the position of the "rhyniophytes" (in blue). Diagram based on Kenrick & Crane 1997. More recent molecular research reverses the position of the hornworts and mosses.
Cladogram of the land plants showing the position of the "rhyniophytes" (in blue). Diagram based on Kenrick & Crane 1997. More recent molecular research reverses the position of the hornworts and mosses.[2]


References

  1. ^ a b Kenrick, Paul; Peter R. Crane (1997). The Origin and Early Diversification of Land Plants : A Cladistic Study. Washington, D.C.: Smithsonian Institution Press, pp. 139-140, 249. ISBN 1-56098-730-8. 
  2. ^ Qiu et al. 2006

See also

Polysporangiophytes

External links
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