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Temporal range: Late Carboniferous
Lyginopteris oldhamiana.jpg
Permineralized stem Lyginopteris oldhamiana from coal ball of Late Carboniferous Six Inch Coal in Hough Hill Colliery near Stalybridge, England
Scientific classification
Kingdom: Plantae
Phylum: Pteridospermophyta
Order: Lyginopteridales
Family: Lyginopteridaceae
Genus: Lyginopteris
(Binney) Potonie 1899

Lyginopteris is a genus of Late Carboniferous seed fern stems with a very distinctive outer cortex of sclereids forming a pattern in cross section like Roman numerals on a clock face, often called a Sparganium cortex. Some Lyginopteris were parasitized by water molds.[1]


  1. ^ Strullu-Derrien, C.; Kenrick, P.; Rioult, J. P.; Strullu, D. G. (2010). "Evidence of parasitic Oomycetes (Peronosporomycetes) infecting the stem cortex of the Carboniferous seed fern Lyginopteris oldhamia". Proceedings of the Royal Society B: Biological Sciences. 278: 675. doi:10.1098/rspb.2010.1603. PMC 3030852Freely accessible. PMID 20843846.