| details |
Late Pennsylvanian |
|
Pennsylvania |
Cross,A.T. The geology of the Pittsburgh Coal: Stratigraphy, petrology, origin and composition, and geologic interpretation of mining problems. |
1952 |
| details |
Late Pennsylvanian |
|
West Virginia |
Cross,A.T. The geology of the Pittsburgh Coal: Stratigraphy, petrology, origin and composition, and geologic interpretation of mining problems. |
1952 |
| details |
Late Pennsylvanian |
|
Ohio |
Cross,A.T. The geology of the Pittsburgh Coal: Stratigraphy, petrology, origin and composition, and geologic interpretation of mining problems. |
1952 |
| details |
Late Devonian |
|
Canada(Quebec) |
Chaloner,W.G. et al. A Devonian seed megaspore. |
1963 |
| details |
Late Devonian |
|
Nd |
Potonie,R. The spores of Palaeozoic plants in the natural (Morphologic) system |
1954 |
| details |
Late Devonian |
|
Canada |
Potonie,R. Synopsis of the genera of the sporae dispersae. Part 4. Supplement to all Groups, (Turmae). |
1966 |
| details |
Late Devonian |
|
China(Hupei) |
Li,C.-S. et al. Frasnian (Upper Devonian) evidence for multiple origins of seed like structures. |
1997 |
| details |
Late Carboniferous |
|
W.Germany(Saarland) |
Bharadwaj,D.C. The spore genera from the Upper Carboniferous Cos of the Saar and their value in stratigraphical studies. |
1956 |
| details |
Late Carboniferous |
|
W.Germany(N.Rhine) |
Potonie,R. et al. The genera of Paleozoic sporae dispersae and their stratigraphy. |
1954 |
| details |
Late Carboniferous |
|
Netherlands |
Dijkstra,S.J. Carboniferous megaspores and their practical importance in Mining. |
1957 |
| details |
Late Carboniferous |
|
Nd |
Chaloner,W.G. et al. Heterospory: Cul-de-Sac or pathway to the seed? (In: Pollen and Spores, Patterns of Diversification. S.Blackmore and S.H.Barnes, editors) |
1991 |
| details |
Givetian |
Frasnian |
Greenland |
Allen,K.C. Devonian megaspores from East Greenland. |
1974 |
| details |
Frasnian |
Famennian |
Nd |
Kedves,M. Introduction to the palynology of Pre-Quaternary deposits |
1986 |
| details |
Frasnian |
Famennian |
Nd |
Chaloner,W.G. Spores and Land-Plant evolution. |
1967 |
| details |
Famennian |
|
Nd |
Pettitt,J.M. Heterospory and the Rise of the seed Habit. |
1969 |
| details |
Early Tournaisian |
|
Wales(Glamorgan) |
Allen,K.C. et al. Megaspores with multifurcate and bifurcate processes from the Old Red Sandstone facies of Tournasian age, from the Taff Gorge, South Glamorgan, Wales. |
1981 |
| details |
Early Permian |
|
Australia(S.Australia) |
Harris,W.K. The occurrence and identification of megaspores in Permian sediments, South Australia. |
1969 |