Micrhystridium |
Micrhystridium sp
|
Alaska(North Slope) |
Aptian |
Albian |
Microdinium |
Microdinium opacum
|
Alaska(North Slope) |
Early Cretaceous |
Aptian |
Muderongia |
Muderongia sp
|
Alaska(North Slope) |
Aptian |
Albian |
Muderongia |
Muderongia sp
|
Alaska(North Slope) |
Aptian |
Albian |
Muderongia |
Muderongia sp
|
Alaska(North Slope) |
Aptian |
Albian |
Muderongia |
Muderongia sp
|
Alaska(North Slope) |
Early Cretaceous |
|
Muderongia |
Muderongia sp
|
Alaska(North Slope) |
Hauterivian |
|
Muderongia |
Muderongia tetracantha
|
Alaska(North Slope) |
Hauterivian |
Albian |
Nannoceratopsis |
Nannoceratopsis gracilis
|
Alaska(North Slope) |
Early Jurassic |
Middle Jurassic |
Nannoceratopsis |
Nannoceratopsis pellucida
|
Alaska(North Slope) |
Oxfordian |
|
Nelchinopsis |
Nelchinopsis kostromiensis
|
Alaska(North Slope) |
Valanginian |
|
Odontochitina |
Odontochitina operculata
|
Alaska(North Slope) |
Hauterivian |
Albian |
Odontochitina |
Odontochitina sp
|
Alaska(North Slope) |
Hauterivian |
|
Oligosphaeridium |
Oligosphaeridium complex
|
Alaska(North Slope) |
Cretaceous |
|
Osmundacidites |
Osmundacidites sp
|
Alaska(North Slope) |
Aptian |
Albian |
Osmundacidites |
Osmundacidites sp
|
Alaska(North Slope) |
Aptian |
Albian |
Osmundacidites |
Osmundacidites sp
|
Alaska(North Slope) |
Aptian |
Albian |