| original |
Late Maestrichtian |
|
Colombia |
Hammen,T.Van Der et al. The development of the Colombian flora through geological period I: Maestrichtian to Lower Tertiary. |
1954 |
| details |
Maastrichtian |
|
Colombia |
Potonie,R. Synopsis of the genera of the sporae dispersae. Part 2 |
1958 |
| details |
Maastrichtian |
|
Colombia |
Krutzsch,W. Taxonomy of the syncolporate and the morphologic relationship of the pollen genera and species (Sporae dispersae), of the Upper Cretaceous and Tertiary. Part 1. Syncolporate and Syncolporatoide pollen forms. |
1969 |