Archaeohystrichosphaeridium |
Archaeohystrichosphaeridium cuneidentatum
|
USSR(Pre-Baltic) |
Middle Cambrian |
|
Archaeohystrichosphaeridium |
Archaeohystrichosphaeridium mickwitzii
|
USSR(Russian Platform) |
Early Ordovician |
|
Archaeohystrichosphaeridium |
Archaeohystrichosphaeridium mickwitzii
|
USSR(Pre-Baltic) |
Late Cambrian |
|
Archaeohystrichosphaeridium |
Archaeohystrichosphaeridium minor
|
USSR(Russian Platform) |
Tremadocian |
|
Archaeohystrichosphaeridium |
Archaeohystrichosphaeridium minor
|
England(Staffordshire) |
Cambrian |
|
Archaeohystrichosphaeridium |
Archaeohystrichosphaeridium oblongum
|
USSR(Russian Platform) |
Tremadocian |
Llanvirnian |
Archaeohystrichosphaeridium |
Archaeohystrichosphaeridium oblongum
|
USSR(Pre-Baltic) |
Early Cambrian |
|
Archaeohystrichosphaeridium |
Archaeohystrichosphaeridium panderi
|
USSR(Russian Platform) |
Tremadocian |
Early Gothlandian |
Archaeohystrichosphaeridium |
Archaeohystrichosphaeridium pentagonum
|
USSR(Russian Platform) |
Tremadocian |
|
Archaeohystrichosphaeridium |
Archaeohystrichosphaeridium pentagonum
|
USSR(Pre-Baltic) |
Late Cambrian |
|
Archaeohystrichosphaeridium |
Archaeohystrichosphaeridium pungens
|
USSR(Russian Platform) |
Ordovician |
|
Archaeohystrichosphaeridium |
Archaeohystrichosphaeridium pungens
|
USSR(Pre-Baltic) |
Middle Cambrian |
Late Cambrian |
Archaeohystrichosphaeridium |
Archaeohystrichosphaeridium unguisum
|
USSR(Russian Platform) |
Ordovician |
|
Archaeohystrichosphaeridium |
Archaeohystrichosphaeridium unguisum
|
USSR(Pre-Baltic) |
Late Cambrian |
|
Azonomonoletes |
Azonomonoletes echinatus
|
USSR(Russian Platform) |
Tremadocian |
|
Azonomonoletes |
Azonomonoletes echinatus
|
USSR(Leningrad) |
Early Gothlandian |
|
Azonomonoletes |
Azonomonoletes parvimammus
|
USSR(Russian Platform) |
Tremadocian |
|