Genus Sphaerochitina
- Species total:
- 126
- Age range:
- 4100 - 289 MA (obsolete dating)
- IRMNG:
- find
| Name | From | To | Age range |
|---|---|---|---|
| Sphaerochitina vulgaris | Arenigian | Llandeilian |
|
| Sphaerochitina vitrea | Early Paleozoic | Ludlovian |
|
| Sphaerochitina vetusta | Late Ordovician | Late Ordovician |
|
| Sphaerochitina valentini | Ludlovian | Ludlovian |
|
| Sphaerochitina undosa | Late Ordovician | Late Ordovician |
|
| Sphaerochitina transitiformis | Wenlockian | Wenlockian |
|
| Sphaerochitina taugourdeaui | Virgilian | Virgilian |
|
| Sphaerochitina taenia | Valentian | Valentian |
|
| Sphaerochitina symmetrica | Late Ordovician | Late Ordovician |
|
| Sphaerochitina suspensa | Middle Ordovician | Middle Ordovician |
|
| Sphaerochitina spinipes | Early Paleozoic | Silurian |
|
| Sphaerochitina sphaerocephala | Ordovician | Devonian |
|
| Sphaerochitina sp.I | Early Llandoverian | Early Llandoverian |
|
| Sphaerochitina sp.G | Late Llandoverian | Early Wenlockian |
|
| Sphaerochitina sp.F | Late Llandoverian | Middle Wenlockian |
|
| Sphaerochitina sp.E | Late Llandoverian | Early Wenlockian |
|
| Sphaerochitina sp.C | Pragian | Pragian |
|