| details |
Middle Pennsylvanian |
|
Illinois |
Balbach,M.K. Paleozoic Lycopsid fructifications.Iii. Conspecificity of British and North American Lepidostrobus Petrifaction. |
1967 |
| details |
Middle Pennsylvanian |
|
Kansas |
Balbach,M.K. Paleozoic Lycopsid fructifications.Iii. Conspecificity of British and North American Lepidostrobus Petrifaction. |
1967 |
| details |
Late Carboniferous |
|
Illinois |
Potonie,R. Synopsis of the Sporae in situ. |
1962 |
| details |
Carboniferous |
|
Nd |
Bharadwaj,D.C. et al. Suggestions for a morphological classification of sporae dispersae. |
1968 |
| details |
Carboniferous |
|
England |
Balme,B.E. Fossil in situ, spores and pollen grains: An annotated catalogue. |
1995 |