Crassispora |
Crassispora apisaculea
|
Alaska |
Late Visean |
|
Crassispora |
Crassispora apisaculea
|
Canada(Arctic) |
Middle Visean |
Late Visean |
Crassispora |
Crassispora conifera
|
Alaska |
Late Tournaisian |
Early Visean |
Crassispora |
Crassispora conifera
|
Spitsbergen |
Tournaisian |
|
Crassispora |
Crassispora maculosa
|
Alaska |
Late Tournaisian |
Early Visean |
Cristatisporites |
Cristatisporites aculeatus
|
Alaska |
Late Visean |
|
Cristatisporites |
Cristatisporites apisaculeus
|
Alaska |
Late Visean |
|
Cristatisporites |
Cristatisporites apisaculeus
|
Canada(Arctic) |
Middle Visean |
Late Visean |
Cristatisporites |
Cristatisporites indignabundus
|
Alaska |
Late Tournaisian |
Early Visean |
Cristatisporites |
Cristatisporites sp.1 Ravn,1991
sp. nov. |
Alaska |
Middle Visean |
|
Cyclogranisporites |
Cyclogranisporites nahannensis
|
Alaska |
Middle Visean |
Late Visean |
Cyclogranisporites |
Cyclogranisporites nahannensis
|
Canada(NWT,Mackenzie) |
Late Mississippian |
Namurian A |
Cyclogranisporites |
Cyclogranisporites rigidus
|
Spitsbergen |
Early Carboniferous |
|
Cyclogranisporites |
Cyclogranisporites sp
|
Alaska |
Late Tournaisian |
Visean |
Cystoptychus |
Cystoptychus velatus
|
Alaska |
Late Visean |
|
Cystoptychus |
Cystoptychus velatus
|
Oklahoma |
Springerian |
|
Dacrycarpites |
Dacrycarpites europaeus
|
Germany(Leipzig) |
Keuper |
|