Trachysphaeridium |
Trachysphaeridium textuplicatum
|
Nd |
Late Ordovician |
|
Trachysphaeridium |
Trachysphaeridium timofeevii
|
Nd |
Late Riphean |
Vendian |
Trachysphaeridium |
Trachysphaeridium undulatum
|
Nd |
Nd |
|
Trachysphaeridium |
Trachysphaeridium uspenskyi
|
USSR(Urals) |
Silurian |
Middle Devonian |
Trachysphaeridium |
Trachysphaeridium uspenskyi
|
Nd |
Early Ordovician |
Middle Ordovician |
Trachysphaeridium |
Trachysphaeridium uspenskyi
|
Nd |
Early Ordovician |
Middle Ordovician |
Trachysphaeridium |
Trachysphaeridium vetternii
|
Nd |
Riphean |
|
Trachysphaeridium |
Trachysphaeridium vidalii
|
Nd |
Nd |
|
Trachysphaeridium |
Trachysphaeridium wangjiawanense
|
Nd |
Sinian |
|
Trachysphaeridium |
Trachysphaeridium yimenense
|
Nd |
Late Precambrian |
|
Trachysphaeridium |
Trachysphaeridium yunnanense
|
Nd |
Late Precambrian |
|
Trachytriletes |
Trachytriletes
|
Nd |
Nd |
|
Trachytriletes |
Trachytriletes ancoraeformis
|
Nd |
Early Hauterivian |
|
Trachytriletes |
Trachytriletes angiopteroides
|
Nd |
Jurassic |
Cretaceous |
Trachytriletes |
Trachytriletes arcticus
|
Nd |
Devonian |
|
Trachytriletes |
Trachytriletes asper
|
Nd |
Late Namurian |
|
Trachytriletes |
Trachytriletes asperatus
|
Nd |
Carboniferous |
|