Pteruchus

Pteruchus is a form genus for pollen organs of the seed fern (Pteridospermatophyta family Umkomasiaceae. It was first described by Hamshaw Thomas[1] from the Umkomaas locality of South Africa. It is associated with the seed bearing organs Umkomasia and Dicroidium leaves.

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
Temporal range:
Pteruchus africanus fossil pollen organ, Late Triassic, Molteno Formation, Umkomaas, South Africa.
Scientific classification Edit this classification
Kingdom: Plantae
Order: Corystospermales
Family: Corystospermaceae
Genus: Pteruchus
Thomas (1933)[1]

Description

The pollen organ Pteruchus differs from other seed fern pollen organs in having numerous pendant pollen sacs from a blade-like head, in an arrangement similar to an epaulette.

Whole plant reconstructions

References

  1. Thomas, H.H. (1933). "On some pteridospermous plants from the Mesozoic rocks of South Africa". Philosophical Transactions of the Royal Society B. 222 (483–493): 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 (3): 1010–1057. doi:10.2307/2399379. JSTOR 2399379.
  3. Retallack,G.J. (1977). "Reconstructing Triassic vegetation of Australasia: a new approach for the biostratigraphy of Gondwanaland". Alcheringa. 1: 247–278. doi:10.1080/03115517708527763.
  4. Anderson, Heidi M.; Barbacka, Maria; Bamford, Marion K.; Holmes, W. B. Keith; Anderson, John M. (2019-10-02). "Pteruchus (microsporophyll): part 2 of a reassessment of Gondwana Triassic plant genera and a reclassification of some previously attributed". Alcheringa: An Australasian Journal of Palaeontology. 43 (4): 511–533. doi:10.1080/03115518.2019.1617348. ISSN 0311-5518. S2CID 198398356.


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