| original |
Late Westphalian C |
|
Iowa |
Hoskins,J.H. et al. Monograph of the Paleozoic cone genus Bowmanites (Sphenophyllales). |
1943 |
| details |
Nd |
|
Nd |
Potonie,R. The phylogeny of the spore shape in regard to families of fossil plants (except the angiosperms). |
1961 |
| details |
Westphalian C |
|
Iowa |
Potonie,R. Synopsis of the Sporae in situ. |
1962 |
| details |
Nd |
|
Nd |
Potonie,R. Fossil sporae in situ. Comparison with the sporae dispersae. Addition to the synopsis of the sporae in situ. |
1965 |
| details |
Nd |
|
Nd |
Potonie,R. Synopsis of the genera of the sporae dispersae. Part 4. Supplement to all Groups, (Turmae). |
1966 |
| details |
Carboniferous |
|
Nd |
Bharadwaj,D.C. et al. Suggestions for a morphological classification of sporae dispersae. |
1968 |
| details |
Middle Pennsylvanian |
|
Iowa |
Good,C.W. Taxonomic characteristics of Sphenophyllalean Cones. |
1978 |
| details |
Carboniferous |
|
USA |
Balme,B.E. Fossil in situ, spores and pollen grains: An annotated catalogue. |
1995 |