In real estate it's location, location, location. In Paleodoublespeak its location, location, location. Glossopterids didn't inhabit a savanna ecosystem with arid to semiarid climates, so there aren't any.
Voltziales and Glossopterids
"Rise of Northern Hemisphere Voltziales and diversification of Southern Hemisphere glossopterids. Extinction, arborescent lycopsids, and sphenopsids. Diversification of reptiles."
The Triassic is another microcosm of inductive reductive circular reasoning that we may wryly refer to as an "eddy in the space-time continuum." It's a tip of the hat to Douglas Adams, author of the Hitchhiker's Guide to the Galaxy.
After Noah's flood a wind caused the waters to evaporate. The cooling effect caused the formation of equatorial and polar ice. Temperate zones were in the mid-latitudes of the Northern and Southern Hemispheres.
The Permian is an induction dumpster fire. Inconvenient sedimentary deposits and evidence of phenomenon which are difficult to rationalize found their way into the Permian.