Genus Micrhystridium
- Species total:
- 558
- Age range:
- 4100 - 0 MA (obsolete dating)
- IRMNG:
- find
| Name | From | To | Age range |
|---|---|---|---|
| Micrhystridium tubulispinosum | Ypresian | Rupelian |
|
| Micrhystridium tumultus | Maastrichtian | Maastrichtian |
|
| Micrhystridium type 1 | Late Rhaetian | Middle Miocene |
|
| Micrhystridium type 2 | Late Rhaetian | Middle Miocene |
|
| Micrhystridium type 3 | Late Rhaetian | Middle Miocene |
|
| Micrhystridium type 4 | Late Rhaetian | Middle Volgian |
|
| Micrhystridium type 5 | Late Rhaetian | Middle Volgian |
|
| Micrhystridium uncinatum | Ordovician | Middle Gothlandian |
|
| Micrhystridium unilaterale | Cambrian | Cambrian |
|
| Micrhystridium valensii | Middle Jurassic | Middle Jurassic |
|
| Micrhystridium vanceolatum | Late Cambrian | Late Cambrian |
|
| Micrhystridium vanoyei | Late Devonian | Late Devonian |
|
| Micrhystridium variabile | Paleozoic | Oxfordian |
|
| Micrhystridium varians | Early Cambrian | Silurian |
|
| Micrhystridium varipinnosum | Ordovician | Ashgillian |
|
| Micrhystridium varispinosum | Middle Ordovician | Caradocian |
|
| Micrhystridium veligerum | Cretaceous | Cretaceous |
|