Peltaspermales

The Peltaspermales are an extinct order of plants belonging to Pteridospermatophyta, or seed ferns. It is unclear whether they form a natural group of organisms as they are poorly known.[2] It has been suggested that they survived the Cretaceous–Paleogene extinction event.[3]

Peltaspermales
Temporal range:
Scientific classification
Kingdom: Plantae
Clade: Tracheophytes
Clade: Spermatophytes
Order: †Peltaspermales
Delevoryas 1979[1]
Families

The Peltaspermales are divided into two main families, the Peltaspermaceae and the Corystospermaceae. Along these, two informal groups (the "Supaioids"[4] and the "Comioids"[5]) of uncertain taxonomic affinities exist, each centered around a specific genus ; Supaia and Comia.

In 2009, a new genus from the Lower Permian/Leonardian Clear Fork Group was erected and named Auritifolia waggoneri. It was assigned to the "comioids" based on its venation pattern, similar to that of Comia, as well as its simple pinnate fronds[5]

References
  1. Peltaspermales et Fossilworks
  2. Taylor, Edith L.; Taylor, Thomas N.; Krings, Michael (2009). Paleobotany: The Biology and Evolution of Fossil Plants. Academic Press. pp. 639–48. ISBN 9780080557830.
  3. McLoughlin S.; Carpenter R.J.; Jordan G.J.; Hill R.S. (2008). "Seed ferns survived the end-Cretaceous mass extinction in Tasmania". American Journal of Botany. 95: 465–471. doi:10.3732/ajb.95.4.465.
  4. "FLORA OF THE LOWER PERMIAN ABO FORMATION REDBEDS, WESTERN EQUATORIAL PANGEA, NEW MEXICO".
  5. "Auritifolia gen. nov., Probable Seed Plant Foliage with Comioid Affinities from the Early Permian of Texas, U.S.A."


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