original |
Maastrichtian |
|
Canada(NWT,Mackenzie) |
McIntyre,D.J. Palynology of an Upper Cretaceous section, Horton River, District of MacKenzie, N. W. T. |
1974 |
original |
Maastrichtian |
|
Canada(NWT) |
Chlonova,A.F. The distribution of Orbiculapollis pollen at the Cretaceous-Paleogene boundary. (In: Stratigraphy and Palynology of the Mesozoic and Cenozoic of Siberia. V.S.Volkova, editor) |
1979 |
original |
Maestrichtian |
|
Nd |
Chlonova,A.F. Form-genus Orbiculapollis Chlonova, 1961. (In: Synopsis: Key and Correlative Taxa (Late Cretaceous - Paleogene) angiosperm pollen (Reference Manual). M.A.Petrosyants, editor) |
1979 |