Genus Tetrada
- Species total:
- 2
- Age range:
- 500 - 0 MA (obsolete dating)
- IRMNG:
- find
| Name | From | To | Age range |
|---|---|---|---|
| Tetrada sp | Tremadocian | Tremadocian |
|
| Tetrada brachyphyllum | Late Jurassic | Late Jurassic |
|
Genus Tetrada
- Species total:
- 2
- Age range:
- 500 - 0 MA (obsolete dating)
- IRMNG:
- find
| Name | From | To | Age range |
|---|---|---|---|
| Tetrada sp | Tremadocian | Tremadocian |
|
| Tetrada brachyphyllum | Late Jurassic | Late Jurassic |
|