Tectitheca |
Tectitheca spinifera
|
E.Germany |
Late Llanvirnian |
|
Tectitheca |
Tectitheca valida
|
E.Germany |
Late Llanvirnian |
|
Trachydiacrodium |
Trachydiacrodium ovale
|
E.Germany |
Late Llanvirnian |
|
Trematosphaeridium |
Trematosphaeridium inspissatum
|
India |
Cambrian |
|
Triangulina |
Triangulina alargada
|
Africa(Sahara) |
Emsian |
|
Triangulina |
Triangulina alargada
|
Spain |
Emsian |
|
Triangulina |
Triangulina alargada
|
Canada(Ontario) |
Givetian |
|
Triangulina |
Triangulina alargada
|
Romania |
Gedinnian |
|
Triangulina |
Triangulina alargada
|
Spain |
Silurian |
Devonian |
Triangulina |
Triangulina alargada
|
Brazil |
Devonian |
|
Triangulina |
Triangulina alargada
|
France |
Ludlovian |
|
Triangulina |
Triangulina alargada
|
Romania |
Siegenian |
|
Triangulina |
Triangulina alargada
|
Libya |
Silurian |
|
Triangulina |
Triangulina alargada
|
Florida |
Llandoverian |
Wenlockian |
Triangulina |
Triangulina alargada
|
Kentucky |
Llandoverian |
Wenlockian |
Tunisphaeridium |
Tunisphaeridium eligmosum
|
Czechoslovakia |
Arenigian |
|
Tytthodiscus |
Tytthodiscus californiensis
|
California |
Eocene |
Late Neogene |