Acanthotriletes |
Acanthotriletes echinatus
|
Iowa |
Chesterian |
|
Ahrensisporites |
Ahrensisporites beeleyensis
|
Iowa |
Chesterian |
|
Ahrensisporites |
Ahrensisporites halesi
sp. nov. |
Iowa |
Chesterian |
|
Anapiculatisporites |
Anapiculatisporites minor
|
Iowa |
Chesterian |
|
Calamospora |
Calamospora hartungiana
|
Iowa |
Chesterian |
|
Camptotriletes |
Camptotriletes bacculentus
|
Iowa |
Chesterian |
|
Camptotriletes |
Camptotriletes cristatus
|
Iowa |
Chesterian |
|
Cincturasporites |
Cincturasporites
|
Iowa |
Chesterian |
|
Cincturasporites |
Cincturasporites altilis
|
Iowa |
Chesterian |
|
Cirratriradites |
Cirratriradites saturni
|
Iowa |
Chesterian |
|
Convolutispora |
Convolutispora ampla
|
Iowa |
Chesterian |
|
Convolutispora |
Convolutispora florida
|
Iowa |
Chesterian |
|
Convolutispora |
Convolutispora mellita
|
Iowa |
Chesterian |
|
Convolutispora |
Convolutispora tortuosa
sp. nov. |
Iowa |
Chesterian |
|
Costatascyclus |
Costatascyclus
|
Iowa |
Chesterian |
|
Costatascyclus |
Costatascyclus crenatus
|
Iowa |
Chesterian |
|
Densosporites |
Densosporites aculeatus
|
Iowa |
Chesterian |
|