Striatotheca |
Striatotheca tenuistriata
|
E.Germany |
Late Llanvirnian |
|
Striatotheca |
Striatotheca transformata
|
E.Germany |
Late Arenigian |
|
Striatotheca |
Striatotheca transformata
|
E.Germany |
Early Llanvirnian |
|
Striatotheca |
Striatotheca trapeziformis
|
France |
Arenigian |
|
Striatotheca |
Striatotheca trapeziformis
|
E.Germany |
Late Arenigian |
|
Striatotheca |
Striatotheca trapeziformis
|
E.Germany |
Early Llanvirnian |
|
Striatotheca |
Striatotheca triangulata
|
Morocco |
Late Arenigian |
Early Llanvirnian |
Striatotheca |
Striatotheca triangulata
|
Spain |
Late Arenigian |
Early Llanvirnian |
Striatotheca |
Striatotheca triangulata
|
Tunisia |
Late Arenigian |
Early Llanvirnian |
Striatotheca |
Striatotheca trigonia
|
E.Germany |
Late Llanvirnian |
|
Sylvanidium |
Sylvanidium paucibrachium
|
Canada(Quebec) |
Late Ordovician |
|
Sylvanidium |
Sylvanidium paucibrachium
|
Oklahoma |
Late Ordovician |
|
Symplassosphaeridium |
Symplassosphaeridium cambriense
|
Czechoslovakia |
Middle Cambrian |
|
Tectitheca |
Tectitheca additionalis
|
E.Germany |
Late Arenigian |
|
Tectitheca |
Tectitheca additionalis
|
E.Germany |
Early Llanvirnian |
|
Tectitheca |
Tectitheca contracta
|
E.Germany |
Late Llanvirnian |
|
Tectitheca |
Tectitheca filigera
|
E.Germany |
Late Llanvirnian |
|