Caytonia

Caytonia is an extinct genus of seed ferns.

Caytonia Temporal range: Jurassic PreꞒ Ꞓ O S D C P T J K Pg N −
Caytonia nathorstii ovulate structure, Middle Jurassic, Gristhorpe Bed, Cloughton Formation, Cayton Bay, Yorkshire.
Scientific classification
Kingdom:	Plantae
Clade:	Tracheophytes
Division:	†Pteridospermatophyta
Order:	†Caytoniales
Family:	†Caytoniaceae
Genus:	†Caytonia H.H.Thomas, 1925
Species
Caytonia nathorstii

A complete reconstruction of Caytonia nathorstii plant Retallack and Dilcher 1988^[1]

Description

Caytonia has berry-like cupules with numerous small seeds arrayed along axes ^[2]

Whole plant reconstructions

Different organs attributed to the same original plant can be reconstructed from co-occurrence at the same locality and from similarities in the stomatal apparatus and other anatomical peculiarities of fossilized cuticles.

• Caytonia nathorstii may have been produced by the same plant as Caytonanthus arberi (pollen organs) and Sagenopteris phillipsii (leaves).

References

1. Retallack, G.J.; Dilcher, D.L. (1988). "Reconstructions of selected seed ferns". Missouri Botanical Garden Annals. 75 (3): 1010–1057. doi:10.2307/2399379. JSTOR 2399379.
2. Elgorriaga, A.; Escapa, I. H.; Cúneo, R. (2019). "Southern Hemisphere Caytoniales: vegetative and reproductive remains from the Lonco Trapial Formation (Lower Jurassic), Patagonia". Journal of Systematic Palaeontology. 17 (17): 1477–1495. doi:10.1080/14772019.2018.1535456. S2CID 92287804.