Onondagella |
Onondagella asymmetrica
|
USSR(Russian Platform) |
Llandoverian |
Ludlovian |
Onondagella |
Onondagella deunffii
|
England |
Downtonian |
|
Onondagella |
Onondagella deunffii
|
Libya |
Late Ludlovian |
|
Onondagella |
Onondagella deunffii
|
USSR(Estonian SSR) |
Downtonian |
|
Onondagella |
Onondagella deunffii
|
USSR(Russian Platform) |
Downtonian |
|
Pulvinosphaeridium |
Pulvinosphaeridium trifidum
|
USSR(Estonian SSR) |
Downtonian |
Gedinnian |
Pulvinosphaeridium |
Pulvinosphaeridium trifidum
|
USSR(Russian Platform) |
Downtonian |
Gedinnian |
Pulvinosphaeridium |
Pulvinosphaeridium trifidum
|
Libya |
Gedinnian |
|
Streelispora |
Streelispora newportensis
|
England |
Gedinnian |
|
Streelispora |
Streelispora newportensis
|
USSR(Russian Platform) |
Gedinnian |
|
Streelispora |
Streelispora newportensis
|
Wales |
Gedinnian |
|
Visbysphaera |
Visbysphaera dilatispinosa
|
England |
Ludlovian |
Downtonian |
Visbysphaera |
Visbysphaera dilatispinosa
|
Wales |
Ludlovian |
Downtonian |
Visbysphaera |
Visbysphaera dilatispinosa
|
Libya |
Ludlovian |
Downtonian |
Visbysphaera |
Visbysphaera jardinei
|
Libya |
Downtonian |
|