Platysoma |
Platysoma microphyllum
|
Nd |
Nd |
|
Gleicheniidites |
Gleicheniidites senonicus
|
North America |
Middle Jurassic |
Oligocene |
Pyramidella |
Pyramidella triquetra
|
North America |
Middle Jurassic |
|
Pyramidella |
Pyramidella gyrinoides
|
North America |
Middle Jurassic |
|
Gleichenia |
Gleichenia stellata
|
North America |
Middle Jurassic |
|
Leiotriletes |
Leiotriletes orientalis
|
North America |
Middle Jurassic |
Early Tertiary |
Alsophila |
Alsophila arcuata
|
North America |
Middle Jurassic |
Early Tertiary |
Gleichenia |
Gleichenia angulata
|
North America |
Middle Jurassic |
Early Tertiary |
Gleichenia |
Gleichenia circinidites
|
North America |
Middle Jurassic |
Early Tertiary |
Concavisporites |
Concavisporites acutus
|
North America |
Middle Jurassic |
Early Tertiary |
Concavisporites |
Concavisporites arugulatus
|
North America |
Middle Jurassic |
Early Tertiary |
Concavisporites |
Concavisporites obtusangulus
|
North America |
Middle Jurassic |
Early Tertiary |
Gleicheniidites |
Gleicheniidites senonicus
|
North America |
Middle Jurassic |
Early Tertiary |
Gleicheniidites |
Gleicheniidites communa
|
North America |
Middle Jurassic |
Early Tertiary |
Leiotriletes |
Leiotriletes arcadoformis
|
North America |
Middle Jurassic |
Early Tertiary |
Gleicheniidites |
Gleicheniidites toriconcavus
|
North America |
Middle Jurassic |
Early Tertiary |
Gleicheniidites |
Gleicheniidites toriconcavus
|
North America |
Middle Jurassic |
Early Tertiary |