Genus Trachysphaeridium
- Species total:
- 122
- Age range:
- 4100 - 54.5 MA (obsolete dating)
- IRMNG:
- find
Name | From | To | Age range |
---|---|---|---|
Trachysphaeridium universalum | Cambrian | Downtonian |
|
Trachysphaeridium minutissimum | Cambrian | Silurian |
|
Trachysphaeridium asperatum | Cambrian | Silurian |
|
Trachysphaeridium induratum | Early Cambrian | Early Cambrian |
|
Trachysphaeridium adischevii | Early Cambrian | Early Cambrian |
|
Trachysphaeridium rugellosum | Ordovician | Ludlovian |
|
Trachysphaeridium variabile | Early Tremadocian | Early Tremadocian |
|
Trachysphaeridium textuplicatum | Ordovician | Silurian |
|
Trachysphaeridium sp.1 Comb.,1967 | Early Tremadocian | Early Tremadocian |
|
Trachysphaeridium undulatum | Late Tremadocian | Late Tremadocian |
|
Trachysphaeridium plicatum | Late Ordovician | Ludlovian |
|
Trachysphaeridium tschapomicus | Late Caradocian | Ashgillian |
|
Trachysphaeridium pellucidum | Late Caradocian | Ludlovian |
|
Trachysphaeridium inversalum | Llandoverian | Wenlockian |
|
Trachysphaeridium leptodermum | Middle Llandoverian | Middle Devonian |
|
Trachysphaeridium phalanxum | Late Llandoverian | Late Llandoverian |
|
Trachysphaeridium formosum | Wenlockian | Ludlovian |
|