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as the genus Stokesosaurus
5 meters and its weight at two hundred kilograms
It has a gently toothed margin
They live in subtropical and temperate climates and occur as shrubs or small trees
and is a family of extinct mammals belonging to the order Perissodactyla
Mazon Creek Fern P-MC-16-017 Eocene as the genus StokesosaurusNeuropteris sp. Carbondale Formation Middle Pennsylvanian Grundy County, Illinois Complete siderite nodule with a very well preserved fern frond. The Mazon Creek area fossils are found mostly in siderite concretions. The concretions are found in the Francis Creek Shale Member within the Carbondale Formation of the Kewanee Group. The best nodules are a by product of coal strip mining operations. The age of the fossil plants is Desmoinesian, Middle
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