Horneophyton
Horneophyton is a genus of early Devonian fossil land plants. Its fossils are very common in the Rhynie chert. Both the sporophyte and a female gametophyte have been found as fossils. The sporophyte was about 20 cm tall, and the gametophyte was about 6 cm tall. It is not really a vascular plant. It had vascular tissue but the cells had thin walls.
| Horneophyton Temporal range: | |
|---|---|
 | |
| Schematic reconstruction of Horneophyton lignieri to show its growth habit | |
Scientific classification  | |
| Division: | †Horneophyta |
| Class: | †Horneophytopsida |
| Order: | †Horneophytales |
| Family: | †Horneophytaceae Kenrick & Crane (1997) |
| Genus: | †Horneophyton Bargh. & Darrah (1938) |
| Species | |
|
†H. lignieri (Kidst. & W.H.Lang) Bargh. & Darrah (1938) | |
| Synonyms | |
|
Hornea Kidst. & W.H.Lang (1920) non Baker | |
Horneophyton had anatomy similar to the hornworts. It is also similar to the vascular plant Rhynia which lived at the same time. It might therefore be a missing link between the Bryophytes like hornworts and the vascular plants like Rhynia.
References
- Eggert, D.A. (1974), "The sporangium of Horneophyton lignieri (Rhyniophytina)", American Journal of Botany, 61 (4): 405–413, doi:10.1002/j.1537-2197.1974.tb12259.x, JSTOR 2441808
- The biota of early terrestrial ecosystems: the Rhynie Chert, University of Aberdeen, retrieved 6 July 2015
A piece of Rhynie chert has parts of many Horneophyton plants. The red circles show the bases of sporophytes.
This article is issued from Wikipedia. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.