Uniporata |
Uniporata villosa
|
Nd |
Ordovician |
|
Uranidium |
Uranidium
|
Nd |
Nd |
|
Uranidium |
Uranidium semicalvum
|
Nd |
Ashgillian |
|
Valeria |
Valeria
|
Nd |
Nd |
|
Valeria |
Valeria granulata
|
Norway |
Late Riphean |
|
Valeria |
Valeria lophostriata
|
Nd |
Middle Riphean |
|
Valeria |
Valeria sinica
|
USSR(Krasnoyarsk Kray) |
Riphean |
|
Valeria |
Valeria tschapomica
|
USSR(Murmansk) |
Riphean |
|
Valvimorpha |
Valvimorpha
|
Nd |
Nd |
|
Valvimorpha |
Valvimorpha multicornis
|
Nd |
Middle Proterozoic |
|
Valvimorpha |
Valvimorpha semisphaerica
|
Nd |
Middle Proterozoic |
|
Valvimorpha |
Valvimorpha tricornis
|
Nd |
Middle Proterozoic |
|
Valvimorpha |
Valvimorpha unicornis
|
Nd |
Middle Proterozoic |
|
Vandalosphaeridium |
Vandalosphaeridium
|
Nd |
Nd |
|
Vandalosphaeridium |
Vandalosphaeridium reticulatum
|
Nd |
Vendian |
|
Vandalosphaeridium |
Vandalosphaeridium varangeri
|
Nd |
Early Vendian |
|
Vandalosphaeridium |
Vandalosphaeridium walcottii
|
Nd |
Late Riphean |
Early Vendian |