- Author:
- Willems,W.
- Year:
- 1975
- Title:
- Problematical microfossils of the Middle and Upper Eocene from the Kallo borehole (Belgium).
- Foreign title:
- Microfossiles problematiques de L
- Reference:
- Willems,W. (1975) Problematical microfossils of the Middle and Upper Eocene from the Kallo borehole (Belgium). [ Microfossiles problematiques de L ] Revue de Micropal©ontologie Vol. 17 # 4 P. 198- 208
- Google Academy:
- try to search by title in english or foreign title
| Genus | Species | Country(Region) | From | To |
|---|---|---|---|---|
| Yvonniellina | Yvonniellina sp.B sp. nov. | Belgium | Late Eocene | |
| Yvonniellina | Yvonniellina tongerenensis | Belgium | Early Oligocene | |
| Yvonniellina | Yvonniellina variabilis | Belgium | Early Eocene | Middle Eocene |