Tryannus |
Tryannus
|
Nd |
Nd |
|
Tubulifera |
Tubulifera
|
Nd |
Nd |
|
Tubulifera |
Tubulifera heterosolenia
|
Nd |
Landenian |
|
Tubulospina |
Tubulospina
|
Nd |
Nd |
|
Tubulospina |
Tubulospina circinata
|
Nd |
Cenomanian |
|
Tubulospina |
Tubulospina oblongata
|
Nd |
Cenomanian |
|
Tunisphaeridium |
Tunisphaeridium
|
Nd |
Nd |
|
Tunisphaeridium |
Tunisphaeridium caudatum
|
Nd |
Wenlockian |
|
Tunisphaeridium |
Tunisphaeridium concentricum
|
Nd |
Wenlockian |
|
Tunisphaeridium |
Tunisphaeridium eisenackii
|
Nd |
Ashgillian |
|
Tunisphaeridium |
Tunisphaeridium eligmosum
|
Nd |
Arenigian |
|
Tunisphaeridium |
Tunisphaeridium evittii
|
Nd |
Wenlockian |
|
Tunisphaeridium |
Tunisphaeridium flaccidum
|
Nd |
Frasnian |
|
Tunisphaeridium |
Tunisphaeridium minutum
|
Nd |
Ludlovian |
|
Tunisphaeridium |
Tunisphaeridium pactile
|
Nd |
Late Ordovician |
|
Tunisphaeridium |
Tunisphaeridium parvum
|
Nd |
Wenlockian |
|
Tunisphaeridium |
Tunisphaeridium tentaculaferum
|
Nd |
Silurian |
|