Genus Tetramerosphaera
- Species total:
- 2
- Age range:
- 66.17 - 0 MA (obsolete dating)
- IRMNG:
- find
| Name | From | To | Age range |
|---|---|---|---|
| Tetramerosphaera | Nd | Nd |
|
| Tetramerosphaera lacrimula | Late Maastrichtian | Late Maastrichtian |
|
Genus Tetramerosphaera
- Species total:
- 2
- Age range:
- 66.17 - 0 MA (obsolete dating)
- IRMNG:
- find
| Name | From | To | Age range |
|---|---|---|---|
| Tetramerosphaera | Nd | Nd |
|
| Tetramerosphaera lacrimula | Late Maastrichtian | Late Maastrichtian |
|