Asperatopsophosphaera |
Asperatopsophosphaera umishanensis
|
Nd |
Middle Sinian |
|
Asperatopsophosphaera |
Asperatopsophosphaera umishanensis
|
Nd |
Early Sinian |
Middle Sinian |
Assamialetes |
Assamialetes
|
Nd |
Nd |
|
Assamialetes |
Assamialetes crassimurus
|
Nd |
Early Eocene |
|
Assamialetes |
Assamialetes dubius
|
India(Assam) |
Early Eocene |
Middle Eocene |
Assamialetes |
Assamialetes emendatus
|
Nd |
Early Eocene |
|
Assamialetes |
Assamialetes giganteus
|
China(Shensi) |
Kungurian |
|
Assamialetes |
Assamialetes macroluminus
|
Nd |
Paleocene |
Early Eocene |
Assamialetes |
Assamialetes reticulatus
|
Nd |
Middle Eocene |
Late Eocene |
Assamialetes |
Assamialetes taiwanensis
|
Nd |
Late Miocene |
|
Asteriscus |
Asteriscus
|
Nd |
Nd |
|
Asteriscus |
Asteriscus irregularis
|
Nd |
Early Cambrian |
|
Athabascaella |
Athabascaella
|
Nd |
Nd |
|
Athabascaella |
Athabascaella penika
|
Nd |
Tremadocian |
Early Arenigian |
Athabascaella |
Athabascaella playfordii
|
Nd |
Late Tremadocian |
|
Athabascaella |
Athabascaella rossii
|
Nd |
Late Tremadocian |
|
Attritasporites |
Attritasporites
|
Nd |
Nd |
|