Microancyratium |
Microancyratium olecranum
|
Nd |
Early Valanginian |
|
Microbaculidinium |
Microbaculidinium
|
Nd |
Nd |
|
Microbaculidinium |
Microbaculidinium aster
|
Nd |
Late Barremian |
|
Microbaculidinium |
Microbaculidinium cornutum
|
Nd |
Late Hauterivian |
|
Microbaculidinium |
Microbaculidinium filiatum
|
Nd |
Late Berriasian |
|
Microconcentrica |
Microconcentrica
|
Nd |
Nd |
|
Microconcentrica |
Microconcentrica aculeata
|
Nd |
Early Ordovician |
|
Microconcentrica |
Microconcentrica atava
|
Nd |
Early Cambrian |
|
Microconcentrica |
Microconcentrica cancellata
|
Nd |
Nd |
|
Microconcentrica |
Microconcentrica concellata
|
Nd |
Late Proterozoic |
|
Microconcentrica |
Microconcentrica cymata
|
Nd |
Nd |
|
Microconcentrica |
Microconcentrica cymata
|
Nd |
Late Proterozoic |
|
Microconcentrica |
Microconcentrica deimenica
|
Nd |
Middle Cambrian |
|
Microconcentrica |
Microconcentrica delicata
|
Nd |
Nd |
|
Microconcentrica |
Microconcentrica delicata
|
Nd |
Late Proterozoic |
|
Microconcentrica |
Microconcentrica incrustata
|
Nd |
Late Cambrian |
|
Microconcentrica |
Microconcentrica induplicata
|
Nd |
Late Sinian |
|