Archaeopteris macilenta

"Archaeopteris macilenta
Temporal range: Late Devonian to Early Carboniferous
Reconstruction of Archaeopteris macilenta from the Late Devonian Walton Formation, Hancock New York
Scientific classification
Kingdom: Plantae
Division: Progymnospermophyta 
Order: Archaeopteridales
Family: Archaeopteridaceae
Genus: Archaeopteris

Archaeopteris macilenta is distinguished from other species of the genus by leaves which are divided into narrow segments at their tips. Sporangia were bone of different parts of the branches with ordinary foliage leaves. Archaeopteris macilenta leaves and fertile shoots are attached to wood which when permineralized is called Callixylon newberryi[1][2]

A sterile specimen of Archaeopteris macilenta from the Late Devonian, Walton Formation of Deposit, New York
A fertile specimen of Archaeopteris macilenta from the Late Devonian Walton Formation of deposit, New York

References

  1. Beck, CB (1960). "The identity of Archaeopteris and Callixylon.". Brittonia. 12 (4): 351–368. doi:10.2307/2805124. JSTOR 2805124.
  2. Beck, CB (1962). "Reconstruction of Archaeopteris and further consideration of its phylogenetic position.". American Journal of Botany. 49 (4): 373–382. doi:10.2307/2439077. JSTOR 2439077.

External links

This article is issued from Wikipedia - version of the 4/7/2016. The text is available under the Creative Commons Attribution/Share Alike but additional terms may apply for the media files.