Savitrisporites |
Savitrisporites nux
|
Iowa |
Chesterian |
|
Schulzospora |
Schulzospora elongata
|
Iowa |
Chesterian |
|
Secarisporites |
Secarisporites remotus
|
Iowa |
Chesterian |
|
Simozonotriletes |
Simozonotriletes intortus
|
Iowa |
Chesterian |
|
Stenozonotriletes |
Stenozonotriletes lycosporoides
|
Iowa |
Chesterian |
|
Tantillus |
Tantillus triquetrus
|
Iowa |
Chesterian |
|
Trimontisporites |
Trimontisporites
|
Iowa |
Chesterian |
|
Trimontisporites |
Trimontisporites divaricatus
|
Iowa |
Chesterian |
|
Trimontisporites |
Trimontisporites flexuosus
|
Iowa |
Chesterian |
|
Trimontisporites |
Trimontisporites trifidus
|
Iowa |
Chesterian |
|
Trimontisporites |
Trimontisporites triarcuatus
|
Iowa |
Chesterian |
|
Trimontisporites |
Trimontisporites granulatus
sp. nov. |
Iowa |
Chesterian |
|
Trimontisporites |
Trimontisporites contortus
sp. nov. |
Iowa |
Chesterian |
|
Trimontisporites |
Trimontisporites rugosus
sp. nov. |
Iowa |
Chesterian |
|
Triquitrites |
Triquitrites tribullatus
|
Iowa |
Chesterian |
|
Verrucosisporites |
Verrucosisporites morulatus
|
Iowa |
Chesterian |
|
Verrucosisporites |
Verrucosisporites scoticus
|
Iowa |
Chesterian |
|