Pareodinia |
Pareodinia borealis
|
Alaska(North Slope) |
Kimmeridgian |
|
Pareodinia |
Pareodinia borealis
|
Canada(Arctic) |
Tithonian |
|
Pareodinia |
Pareodinia ceratophora
|
Alaska(North Slope) |
Neocomian |
|
Pareodinia |
Pareodinia dasyforma
|
Alaska(North Slope) |
Neocomian |
|
Pareodinia |
Pareodinia dasyforma
|
Canada(Arctic) |
Valanginian |
|
Pareodinia |
Pareodinia osmingtonensis
|
Canada(Arctic) |
Middle Tithonian |
Late Tithonian |
Phoberocysta |
Phoberocysta neocomica
|
Atlantic Coast Offshore |
Berriasian |
Valanginian |
Polysphaeridium |
Polysphaeridium sp
|
USA(Atlantic Coast.Pl.) |
Berriasian |
Valanginian |
Polysphaeridium |
Polysphaeridium sp
|
California |
Berriasian |
Valanginian |
Psaligonyaulax |
Psaligonyaulax apatela
|
Canada(Arctic) |
Hauterivian |
|
Pseudoceratium |
Pseudoceratium nudum
|
Alaska(North Slope) |
Neocomian |
|
Scriniodinium |
Scriniodinium attadalense
|
USA(Atlantic Coast.Pl.) |
Berriasian |
Valanginian |
Scriniodinium |
Scriniodinium attadalense
|
California |
Berriasian |
Valanginian |
Scriniodinium |
Scriniodinium crystallinum
|
Alaska(North Slope) |
Neocomian |
|