Geron |
Geron gracilis
|
Spain |
Late Wenlockian |
Ludlovian |
Geron |
Geron guerillerus
|
Libya |
Silurian |
|
Geron |
Geron guerillerus
|
Saudi Arabia |
Early Gothlandian |
|
Geron |
Geron guerillerus
|
Spain |
Wenlockian |
Early Gedinnian |
Geron |
Geron guerillerus
|
USA(Eastern) |
Llandoverian |
Early Ludlovian |
Geron |
Geron guerillerus
|
Canada(Ontario) |
Llandoverian |
Late Ludlovian |
Goniosphaeridium |
Goniosphaeridium inusitatum
|
Germany |
Malm |
|
Granomarginata |
Granomarginata primitiva
|
India |
Cambrian |
|
Helios |
Helios aranaides
|
Spain |
Llandoverian |
Ludlovian |
Helios |
Helios aranaides
|
Belgium |
Llandoverian |
Ludlovian |
Helios |
Helios aranaides
|
Africa |
Llandoverian |
Ludlovian |
Helios |
Helios aranaides
|
United Kingdom |
Llandoverian |
Ludlovian |
Helios |
Helios aranaides
|
Argentina |
Late Gothlandian |
|
Helios |
Helios aranaides
|
Portuguese Guinea |
Wenlockian |
|
Helios |
Helios aranaides
|
Saudi Arabia |
Wenlockian |
|
Helios |
Helios aranaides
|
Canada(Quebec) |
Llandoverian |
|
Helios |
Helios aranaides
|
Florida |
Middle Llandoverian |
Ludlovian |