Acanthotriletes |
Acanthotriletes mirus
|
Spitsbergen |
Strunian |
Tournaisian |
Archaeoperisaccus |
Archaeoperisaccus
|
USSR |
Frasnian |
|
Archaeotriletes |
Archaeotriletes sp
|
Canada |
Givetian |
Strunian |
Archaeotriletes |
Archaeotriletes sp
|
Africa |
Givetian |
Frasnian |
Archaeotriletes |
Archaeotriletes sp
|
Scotland |
Eifelian |
Givetian |
Archaeotriletes |
Archaeotriletes sp
|
USSR |
Eifelian |
Famennian |
Archaeotriletes |
Archaeotriletes sp
|
Germany |
Givetian |
|
Archaeotriletes |
Archaeotriletes sp
|
Spitsbergen |
Givetian |
|
Archaeotriletes |
Archaeotriletes sp
|
France |
Givetian |
Frasnian |
Biharisporites |
Biharisporites submamillarius
|
Canada |
Frasnian |
|
Calyptosporites |
Calyptosporites microspinosus
|
Scotland |
Eifelian |
Givetian |
Calyptosporites |
Calyptosporites microspinosus
|
Germany |
Givetian |
|
Calyptosporites |
Calyptosporites velatus
|
Scotland |
Eifelian |
Givetian |
Calyptosporites |
Calyptosporites velatus
|
USSR |
Givetian |
|
Calyptosporites |
Calyptosporites velatus
|
Germany |
Givetian |
|
Cincturasporites |
Cincturasporites appendices
|
Spitsbergen |
Tournaisian |
Visean |
Cincturasporites |
Cincturasporites auritus
|
Spitsbergen |
Tournaisian |
Visean |