Oligosphaeridium |
Oligosphaeridium complex
|
Alaska |
Hauterivian |
Middle Albian |
Omatia |
Omatia alaskaensis
|
Alaska |
Hauterivian |
Barremian |
Palaeoperidinium |
Palaeoperidinium cretaceum
|
Alaska |
Late Barremian |
Middle Albian |
Pareodinia |
Pareodinia alaskensis
|
Alaska |
Oxfordian |
|
Pareodinia |
Pareodinia ceratophora
|
Alaska |
Oxfordian |
Valanginian |
Pareodinia |
Pareodinia osmingtonensis
|
Alaska |
Oxfordian |
|
Pareodinia |
Pareodinia prolongata
|
Alaska |
Oxfordian |
|
Parvocysta |
Parvocysta cracens
|
Alaska |
Early Jurassic |
Middle Jurassic |
Parvocysta |
Parvocysta nasuta
|
Alaska |
Early Jurassic |
Middle Jurassic |
Prionodinium |
Prionodinium alaskense
|
Alaska |
Hauterivian |
Barremian |
Protoellipsodinium |
Protoellipsodinium spinigerum
|
Alaska |
Hauterivian |
Barremian |
Pseudoceratium |
Pseudoceratium nudum
|
Alaska |
Hauterivian |
Barremian |
Pseudoceratium |
Pseudoceratium pelliferum
|
Alaska |
Hauterivian |
Barremian |
Senoniasphaera |
Senoniasphaera microreticulata
|
Alaska |
Late Barremian |
Middle Albian |
Sirmiodinium |
Sirmiodinium grossii
|
Alaska |
Oxfordian |
Valanginian |
Stephanelytron |
Stephanelytron redcliffense
|
Alaska |
Oxfordian |
|
Suessia |
Suessia swabiana
|
Alaska |
Norian |
Rhaetian |