Momipites |
Momipites sp
|
Alaska |
Eocene |
|
Monosulcites |
Monosulcites sp
|
Alaska |
Permian |
Triassic |
Muderongia |
Muderongia asymmetrica
|
Alaska |
Aptian |
Albian |
Muderongia |
Muderongia simplex
|
Alaska |
Neocomian |
|
Muderongia |
Muderongia simplex
|
Alaska |
Bajocian |
Neocomian |
Muderongia |
Muderongia sp
|
Alaska |
Neocomian |
Albian |
Muderongia |
Muderongia staurota
|
Alaska |
Neocomian |
|
Muderongia |
Muderongia tetracantha
|
Alaska |
Neocomian |
Albian |
Murospora |
Murospora sp
|
Alaska |
Visean |
|
Nannoceratopsis |
Nannoceratopsis gracilis
|
Alaska |
Early Jurassic |
Early Albian |
Nannoceratopsis |
Nannoceratopsis gracilis
|
Alaska |
Aptian |
Albian |
Nannoceratopsis |
Nannoceratopsis pellucida
|
Alaska |
Oxfordian |
Albian |
Nannoceratopsis |
Nannoceratopsis pellucida
|
Alaska |
Early Jurassic |
Oxfordian |
Nannoceratopsis |
Nannoceratopsis senex
|
Alaska |
Early Jurassic |
Oxfordian |
Nelchinopsis |
Nelchinopsis kostromiensis
|
Alaska |
Neocomian |
|
Nelsoniella |
Nelsoniella aceras
|
Alaska |
Turonian |
Coniacian |
Nelsoniella |
Nelsoniella sp
|
Alaska |
Neocomian |
Albian |