Siwalikiathyrites |
Siwalikiathyrites
|
Nd |
Nd |
|
Spegazzinites |
Spegazzinites
|
Nd |
Miocene |
Pleistocene |
Spirotremesporites |
Spirotremesporites
|
Washington |
Neogene |
|
Spirotremesporites |
Spirotremesporites
|
Nd |
Middle Eocene |
Pleistocene |
Sporormiella |
Sporormiella
|
Alaska |
Miocene |
|
Striadiporites |
Striadiporites
|
Washington |
Miocene |
|
Striadiporites |
Striadiporites
|
Nd |
Middle Eocene |
Pleistocene |
Striadiporites |
Striadiporites californicus
|
Nd |
Nd |
|
Stromiopeltis |
Stromiopeltis
|
Nd |
Nd |
|
Tetraploa |
Tetraploa
|
Wisconsin |
Pliocene |
Pleistocene |
Tetraploa |
Tetraploa
|
Texas |
Wisconsian |
|
Tribolites |
Tribolites
|
Nd |
Middle Eocene |
|
Tribolites |
Tribolites
|
Wyoming |
Eocene |
|
Tricellaesporonites |
Tricellaesporonites
|
Nd |
Middle Eocene |
|
Trichopeltinites |
Trichopeltinites
|
Nd |
Middle Cretaceous |
Pleistocene |
Trichothyrites |
Trichothyrites
|
Nd |
Paleocene |
Pleistocene |
Trihyphaecites |
Trihyphaecites
|
USA(Mid-Continent) |
Mississippian |
|