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The tooth is 4
The wings are opposite like a butterfly and have thin veinlets radiating from the nutlet
is much more similar to that of Diplodocus
Those teeth that have the enamel surface exposed do not show any scratches on the surface
The flower is staminate with globose anthers attached to individual filaments
Mazon Creek Fern P-MC-16-002 Damselfly The tooth is 4Neuropteris 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