Genus Demorhethium
- Species total:
- 4
- Age range:
- 570 - 360 MA (obsolete dating)
- IRMNG:
- find
| Name | From | To | Age range |
|---|---|---|---|
| Demorhethium | Late Gedinnian | Late Gedinnian |
|
| Demorhethium cambriense | Early Paleozoic | Early Paleozoic |
|
| Demorhethium hasletianum | Early Paleozoic | Early Paleozoic |
|
| Demorhethium lappaceum | Early Paleozoic | Late Givetian |
|