| Acanthodiacrodium |
Acanthodiacrodium
|
Nd |
Nd |
|
| Arkonia |
Arkonia
|
Nd |
Nd |
|
| Baltisphaeridium |
Baltisphaeridium longispinosum
|
Nd |
Nd |
|
| Caldariola |
Caldariola
|
Nd |
Ordovician |
|
| Cymatiogalea |
Cymatiogalea
|
Nd |
Ordovician |
|
| Cymatiosphaera |
Cymatiosphaera
|
Nd |
Nd |
|
| Dicrodiacrodium |
Dicrodiacrodium
|
Nd |
Nd |
|
| Frankea |
Frankea breviuscula
|
Nd |
Ordovician |
|
| Frankea |
Frankea longiuscula
|
Nd |
Ordovician |
|
| Frankea |
Frankea sartbernardensis
|
Nd |
Ordovician |
|
| Gloeocapsamorpha |
Gloeocapsamorpha
|
Nd |
Nd |
|
| Leiofusa |
Leiofusa
|
England |
Permian |
|
| Leiosphaeridia |
Leiosphaeridia
|
Nd |
Nd |
|
| Leiosphaeridia |
Leiosphaeridia baltica
|
Nd |
Nd |
|
| Metaleiofusa |
Metaleiofusa
|
England |
Permian |
|
| Micrhystridium |
Micrhystridium
|
Nd |
Permian |
|
| Micrhystridium |
Micrhystridium fragile
|
England |
Permian |
|