Comasphaeridium |
Comasphaeridium taleum
|
Nd |
Late Devonian |
|
Comasphaeridium |
Comasphaeridium tonsum
|
Nd |
Early Arenigian |
|
Comasphaeridium |
Comasphaeridium velvetum
|
Nd |
Early Cambrian |
|
Comasphaeridium |
Comasphaeridium vozmedianum
|
Nd |
Nd |
|
Comasphaeridium |
Comasphaeridium whitei
|
Nd |
Senonian |
|
Comasphaeridium |
Comasphaeridium williereae
|
Nd |
Early Gothlandian |
|
Comasphaeridium |
Comasphaeridium williereae
|
Nd |
Silurian |
|
Comasphaeridium |
Comasphaeridium woodii
sp. nov. |
Tennessee |
Early Cambrian |
|
Comptaluta |
Comptaluta
|
Nd |
Nd |
|
Comptaluta |
Comptaluta alisoniae
|
Nd |
Late Ordovician |
|
Comptaluta |
Comptaluta pirellum
|
Nd |
Llandeilian |
|
Conaticystis |
Conaticystis
|
Nd |
Nd |
|
Conaticystis |
Conaticystis densiconatus
|
Nd |
Early Valanginian |
|
Conaticystis |
Conaticystis orbis
|
Nd |
Early Valanginian |
|
Concentricystes |
Concentricystes
|
Nd |
Nd |
|
Concentricystes |
Concentricystes
|
Nd |
Nd |
|
Concentricystes |
Concentricystes circulus
|
W.Germany(Baden) |
Pliocene |
|