Celtiberium |
Celtiberium dedalinum
|
Spain |
Middle Cambrian |
Ordovician |
Celtiberium |
Celtiberium geminum
|
Spain |
Middle Cambrian |
|
Chalaziosphaeridium |
Chalaziosphaeridium
|
Nd |
Nd |
|
Chalaziosphaeridium |
Chalaziosphaeridium avitum
|
Indiana |
Late Ordovician |
|
Chalaziosphaeridium |
Chalaziosphaeridium delicatum
|
China(Kirin) |
Early Ordovician |
|
Chalaziosphaeridium |
Chalaziosphaeridium dilatostellum
|
Ohio |
Late Ordovician |
|
Chalaziosphaeridium |
Chalaziosphaeridium estoniense
sp. nov. |
USSR(Estonian SSR) |
Silurian |
|
Chalaziosphaeridium |
Chalaziosphaeridium granosum
|
China(Kirin) |
Early Ordovician |
|
Chalaziosphaeridium |
Chalaziosphaeridium granulatum
|
USSR(Estonian SSR) |
Late Ordovician |
|
Chalaziosphaeridium |
Chalaziosphaeridium oligoprojectum
|
England |
Wenlockian |
|
Chalaziosphaeridium |
Chalaziosphaeridium tenuum
|
Argentina |
Wenlockian |
|
Chlamydophorella |
Chlamydophorella nyei
|
Australia(Queensland) |
Late Cretaceous |
|
Chlamydophorella |
Chlamydophorella suemegensis
|
Hungary |
Early Cretaceous |
|
Comasphaeridium |
Comasphaeridium
|
Nd |
Nd |
|
Comasphaeridium |
Comasphaeridium acum
|
Belgium |
Wenlockian |
|
Comasphaeridium |
Comasphaeridium agglutinatum
|
Poland |
Middle Cambrian |
|
Comasphaeridium |
Comasphaeridium apodasmios
|
Ohio |
Late Devonian |
|