Trachydiacrodium |
Trachydiacrodium coarctatum
|
Nd |
Late Cambrian |
|
Trachydiacrodium |
Trachydiacrodium dentatum
|
Nd |
Nd |
|
Trachydiacrodium |
Trachydiacrodium involutivum
|
Nd |
Late Cambrian |
|
Trachydiacrodium |
Trachydiacrodium legiminiforme
|
Nd |
Late Cambrian |
Early Ordovician |
Trachydiacrodium |
Trachydiacrodium maximum
|
Nd |
Late Cambrian |
|
Trachydiacrodium |
Trachydiacrodium nanjiangense
|
Nd |
Sinian |
|
Trachydiacrodium |
Trachydiacrodium ovale
|
Nd |
Llanvirnian |
|
Trachydiacrodium |
Trachydiacrodium productum
|
Nd |
Late Cambrian |
|
Trachydiacrodium |
Trachydiacrodium scabratum
|
Nd |
Early Cambrian |
|
Trachydiacrodium |
Trachydiacrodium signatum
|
Nd |
Late Cambrian |
|
Trachyhystrichosphaera |
Trachyhystrichosphaera
|
Nd |
Nd |
|
Trachyhystrichosphaera |
Trachyhystrichosphaera aimika
|
Nd |
Late Riphean |
|
Trachyhystrichosphaera |
Trachyhystrichosphaera bothnica
|
Nd |
Late Precambrian |
|
Trachyhystrichosphaera |
Trachyhystrichosphaera magna
|
Nd |
Late Proterozoic |
Early Cambrian |
Trachyhystrichosphaera |
Trachyhystrichosphaera vidalii
|
Nd |
Late Precambrian |
|
Trachymarginata |
Trachymarginata aberrantis
|
Nd |
Nd |
|
Trachymarginata |
Trachymarginata crustosa
|
Nd |
Nd |
|