Why Lycospora dominated many Pennsylvanian spore assemblages

The microspore genus Lycospora in its wider sense is produced by both heterosporous cones, Flemingites, and homosporous cones Lepidostrobus. Calculations are made of the number microspores that then individual Pennsylvannian arborescent lycophytes. distribution rooting rhizohores, Stigmaria can be extrapolated to a square kilometre forest. A calculation spores such forest enormous which explains why some dispersed spore floras dominated these spores. There assemblages prepared from coal with high percentages Lycospora. However, methods preparation counting do not give enough information make meaningful their total numbers samples.