Very rare, unusual and interesting Upper Carboniferous - Namurian extinct sphenopterid fossil fern specimen. Nice, large display piece. Locality - Upper Carboniferous, Middle Pennsylvanian, Namurian B "Siodlowe" Beds. Age - ca. 320 Mya Division - Tracheophyta (Sphenopsida) Kingdom - Chlorobiota Plantae Genus - Mariopteris (Zeiller 1878) 10.5 x 5.5 x 4.5 cm ** Comes with certificate of authenticity, paperwork. ââââââThe Carboniferous is a geologic period and system of the Paleozoic that spans 60 million years from the end of the Devonian Period 358.9 million years ago ( Mya), to the beginning of the Permian Period, 298.9 Mya. ... 350 mya; Bathgate, Scotland; Hamilton Quarry; 320 mya; Kansas, US; Mazon Creek; 300 mya; Illinois , US.
