Pteruchus africanus

Pteruchus africanus is a pollen organ of a seed fern (Pteridospermatophyta). It was first described by Hamshaw Thomas [1] from the Umkomaas locality of South Africa.

Umkomasia macleani reconstruction of whole plant including leaves (Dicroidium odontopteroides, pollen organs (Pteruchus africanus based largely on material from the Umkomaas locality of South Africa[2]

Pteruchus africanus
Temporal range: Triassic
Pteruchus africanus fossil pollen organ, Late Triassic, Molteno Formation, Umkomaas, South Africa.
Scientific classification
Kingdom: Plantae
Clade: Tracheophytes
Division: †Pteridospermatophyta
Order: †Peltaspermales
Family: †Corystospermaceae
Genus: †Pteruchus
Species:
†P. africanus
Binomial name
†Pteruchus africanus
Thomas[1]

Description

The pollen organs Pteruchus africanus differ from other species of Pteruchus in small size, and equant blade supporting the pollen sacs.

Whole plant reconstructions

Pteruchus africanus may have been produced by the same plant as Umkomasia macleanii (ovulate organs) and Dicroidium odontopteroides (leaves), based on cuticular similarities between these leaves and reproductive structures at the Umkomaas locality of South Africa.[1]

gollark: I mean, *firm/user* ones should at least be based on their income or something.
gollark: The problem isn't alts. The problem is that the system is broken. In real economies, trading on two "accounts" at once wouldn't do anything.
gollark: I could run a much smaller-scale *similar* thing just using the price craziness.
gollark: No, it's a consequence of a somewhat weird feature and the extremely weird price mechanism.
gollark: Also, "it's generally broken and we'll randomly wipe it" sounds more pre-alpha than beta.

References
  1. Thomas, .H. (1933). "On some pteridospermous plants from the Mesozoic rocks of South Africa". Philosophical Transactions of the Royal Society B. 222: 193–265. doi:10.1098/rstb.1932.0016.
  2. Retallack, G.J. & Dilcher, D.L (1988). "Reconstructions of selected seed ferns". Annals of the Missouri Botanical Garden. 75: 1010–1057. doi:10.2307/2399379.


This article is issued from Wikipedia. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.