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Geolocation
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Author - title
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Year
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| details | Late Pottsville | Allegheny | Kentucky | Cross,A.T. Spore floras of the Pennsylvanian of West Virginia and Kentucky | 1947 |
| details | Middle Tatarian | USSR(Krasnoyarsk Kray) | Betekhtina,O.A. et al. Palaeontological characteristics of the regional horizons of the Kuznetz Basin. (In: The Upper Paleozoic of the Angara Basins;Fauna and Flora. I.T. Zhuravleva and V.I.Ilina, editor) | 1988 |