"Rise of Northern Hemisphere Voltziales and diversification of Southern Hemisphere glossopterids. Extinction, arborescent lycopsids, and sphenopsids. Diversification of reptiles."
Voltziales and Glossopterids
Catastrophically Buried Middle Pennsylvanian Sigillaria and Calamitean Sphenopsids from Indiana, USA: What Kind of Vegetation Was This?
A catastrophically buried stand of calamitean sphenopsids and sigillarian lycopsids is reported from the Middle Pennsylvanian of southwestern Indiana, in the Illinois Basin.