Genus Chalaziosphaeridium
- Species total:
- 10
- Age range:
- 540 - 0 MA (obsolete dating)
- IRMNG:
- find
| Name | From | To | Age range |
|---|---|---|---|
| Chalaziosphaeridium | Nd | Nd |
|
| Chalaziosphaeridium avitum | Late Ordovician | Late Ordovician |
|
| Chalaziosphaeridium delicatum | Early Ordovician | Early Ordovician |
|
| Chalaziosphaeridium dilatostellum | Late Ordovician | Late Ordovician |
|
| Chalaziosphaeridium estoniense | Silurian | Silurian |
|
| Chalaziosphaeridium granosum | Early Ordovician | Early Ordovician |
|
| Chalaziosphaeridium granulatum | Late Ordovician | Late Ordovician |
|
| Chalaziosphaeridium oligoprojectum | Wenlockian | Wenlockian |
|
| Chalaziosphaeridium sp | Middle Cambrian | Middle Cambrian |
|
| Chalaziosphaeridium tenuum | Wenlockian | Wenlockian |
|