Peltaspermaceae

Peltaspermaceae; Temporal range: Middle Permian–Early Jurassic PreꞒ Ꞓ O S D C P T J K Pg N
	leaf from Early Triassic Newport Formation, near Sydney, Australia.
Scientific classification
Kingdom:	Plantae
Clade:	Tracheophytes
Order:	†Peltaspermales
Family:	†Peltaspermaceae; Thomas 1933
Genera
	ovulate structures; pollen organs; Lepidopteris leaves;

Peltaspermaceae is a natural family of seed ferns (Pteridospermatophyta) widespread in both northern and southern hemispheres coal measures of Permian and Triassic age.^[1] Peltasperms would persist in a relictual distribution in Patagonia during the Early Jurassic.^[2]

Description[]

Peltaspermaceae have umbrella-like (peltate) cupules with numerous pendant ovules born in complex large branching structures (). The pollen organ () has radiating cigar-shaped pollen sacs attached to small blades, again in complex branching structures. The leaves (Lepidopteris) are bipinnate to tripinnate with small pinnules on the rachis.

References[]

^ 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.
^ Elgorriaga, Andrés; Escapa, Ignacio H.; Cúneo, N. Rubén (July 2019). "Relictual Lepidopteris (Peltaspermales) from the Early Jurassic Cañadón Asfalto Formation, Patagonia, Argentina". International Journal of Plant Sciences. 180 (6): 578–596. doi:10.1086/703461. ISSN 1058-5893.

External links[]

"Fossilworks: Lepidopteris". paleodb.org. Retrieved 2016-03-18.

[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] Elgorriaga, Andrés; Escapa, Ignacio H.; Cúneo, N. Rubén (July 2019). "Relictual Lepidopteris (Peltaspermales) from the Early Jurassic Cañadón Asfalto Formation, Patagonia, Argentina". International Journal of Plant Sciences. 180 (6): 578–596. doi:10.1086/703461. ISSN 1058-5893.

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