7.9" Pennsylvanian Fossil Flora (Neuropteris & Annularia) Plate

This is a beautiful fossil flora plate that contains both Neuropteris and Annularia fossils. It was collected from the Breathitt Formation of Leslie County, Kentucky. It comes from the Late Carboniferous, Pennsylvanian aged forests that formed the coal shales of Kentucky and Ohio. The opposite side of the plate contains additional Neuropteris fossils and a Lepidodendron fossil.

Neuropteris is an extinct genus of fern that reproduced from seed as opposed to sporophyte reproduction of most modern ferns. As with most seed ferns, Neurodontopteridaceae grew in tree form.

Annularia is the form genus of leaf clusters of tree-like sphenophytes (horsetails) known as Calamites.

Leaves on Calamites trees formed in clusters of 8 or more, called whorls, at spaced nodes along stems. Annularia indicate flat, starburst-shaped whorls, but the shapes of the leaves themselves could vary from oval (A. sphenophylloides) to lanceolate or needle-like (A. radiata). They can also be identified by midline veins throughout the leaf from node to leaf tip.

We use these terms to describe the shapes of fossil imprints. Exact species are often difficult to determine, but these form taxa help in distinguishing the prolific species of sphenophytes that defined the Carboniferous Period.

It comes with an acrylic display stand.
Neuropteris sp. & Annularia sp.
Leslie County, Kentucky
Breathitt Formation
7.9 x 4.8" rock
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