Gorgonisphaeridium |
Gorgonisphaeridium parvispinosum
|
USSR(Estonian SSR) |
Early Ordovician |
|
Gorgonisphaeridium |
Gorgonisphaeridium winslowiae
|
Canada(Alberta) |
Early Mississippian |
|
Guttatisphaeridium |
Guttatisphaeridium
|
Nd |
Nd |
|
Heliosphaeridium |
Heliosphaeridium
|
Nd |
Nd |
|
Heliosphaeridium |
Heliosphaeridium coniferum
|
England |
Early Cambrian |
|
Heliosphaeridium |
Heliosphaeridium dissimilare
|
Poland |
Early Cambrian |
|
Heliosphaeridium |
Heliosphaeridium longum
|
Poland |
Early Cambrian |
|
Heliosphaeridium |
Heliosphaeridium lubomlense
|
USSR(Ukrainian SSR) |
Early Cambrian |
|
Heliosphaeridium |
Heliosphaeridium notatum
|
Poland |
Early Cambrian |
|
Heliosphaeridium |
Heliosphaeridium obscurum
|
Poland |
Middle Cambrian |
|
Heliosphaeridium |
Heliosphaeridium radzynicum
|
USSR |
Early Cambrian |
|
Kallosphaeridium |
Kallosphaeridium aspersum
|
China(Hopei) |
Oligocene |
|
Kallosphaeridium |
Kallosphaeridium brevibarbatum
|
Belgium |
Early Eocene |
|
Kallosphaeridium |
Kallosphaeridium reticulodum
|
China |
Late Oligocene |
|
Lecithodinium |
Lecithodinium
|
Atlantic Coast Offshore |
Late Jurassic |
Cenomanian |
Lecithodinium |
Lecithodinium accretum
|
Atlantic Ocean |
Early Cretaceous |
|
Lecithodinium |
Lecithodinium chondrosum
|
Atlantic Ocean |
Cretaceous |
|