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 Sparganum cortex. Some Lyginopteris were parasitized by water molds, such as the Combresomyces.[1]
| Lyginopteris Temporal range: | |
|---|---|
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| Permineralized stem Lyginopteris oldhamiana from coal ball of Late Carboniferous Six Inch Coal in Hough Hill Colliery near Stalybridge, England | |
Scientific classification  | |
| Kingdom: | Plantae |
| Clade: | Tracheophytes |
| Division: | †Pteridospermatophyta |
| Class: | †Lyginopteridopsida |
| Order: | †Lyginopteridales |
| Family: | †Lyginopteridaceae |
| Genus: | †Lyginopteris (Binney) Potonie 1899 |
| Species | |
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