Trachydiacrodium |
Trachydiacrodium ovale
|
Nd |
Late Llanvirnian |
|
Trematosphaeridium |
Trematosphaeridium inspissatum
|
Nd |
Georgian |
Potsdamian |
Triangulina |
Triangulina alargada
|
Nd |
Gedinnian |
Givetian |
Tunisphaeridium |
Tunisphaeridium eligmosum
|
Nd |
Arenigian |
|
Umbellasphaeridium |
Umbellasphaeridium saharicum
|
Nd |
Couvinian |
Strunian |
Veryhachium |
Veryhachium bernardinae
|
Nd |
Middle Siegenian |
Emsian |
Veryhachium |
Veryhachium brevicorne
|
Nd |
Late Llanvirnian |
|
Veryhachium |
Veryhachium bromidense
|
Nd |
Early Caradocian |
|
Veryhachium |
Veryhachium bulbiferum
|
Nd |
Llandoverian |
Ludlovian |
Veryhachium |
Veryhachium calandrae
|
Nd |
Tremadocian |
Ashgillian |
Veryhachium |
Veryhachium celestum
|
Nd |
Arenigian |
Ludlovian |
Veryhachium |
Veryhachium ceratioides
|
Nd |
Late Emsian |
Frasnian |
Veryhachium |
Veryhachium delmeri
|
Nd |
Llandoverian |
Ludlovian |
Veryhachium |
Veryhachium distractum
|
Nd |
Siegenian |
Strunian |
Veryhachium |
Veryhachium downiei
|
Nd |
Tremadocian |
Frasnian |
Veryhachium |
Veryhachium downiei
|
Nd |
Llandoverian |
Ludlovian |
Veryhachium |
Veryhachium elongatum
|
Nd |
Wenlockian |
|