| original |
Bajocian |
Bathonian |
England(Yorkshire) |
Thomas,H.H. et al. Cycadean Cones of the Yorkshire Jurassic. |
1960 |
| details |
Jurassic |
|
England(Yorkshire) |
Potonie,R. Synopsis of the Sporae in situ. |
1962 |
| details |
Jurassic |
|
England |
Potonie,R. Fossil sporae in situ. Comparison with the sporae dispersae. Addition to the synopsis of the sporae in situ. |
1965 |
| details |
Middle Jurassic |
|
England(Yorkshire) |
Konijnenburg-Cittert,J.H.A.Van In Situ Gymnosperm pollen from the Middle Jurassic of Yorkshire. |
1971 |
| details |
Bajocian |
|
England(Yorkshire) |
Hill,C.R. Ultrastructure of in situ, fossil cycad pollen from the English Jurassic, with a description of the male cone Androstrobus balmei sp.nov. |
1990 |
| details |
Jurassic |
|
England |
Balme,B.E. Fossil in situ, spores and pollen grains: An annotated catalogue. |
1995 |