Hystrichosphaeridium |
Hystrichosphaeridium sylhetii
|
Nd |
Eocene |
|
Hystrichosphaeridium |
Hystrichosphaeridium toyetae
|
Nd |
Middle Siegenian |
Emsian |
Hystrichosphaeridium |
Hystrichosphaeridium trifurcatum
|
Nd |
Ordovician |
|
Hystrichosphaeridium |
Hystrichosphaeridium trifurcatum
|
Nd |
Late Givetian |
|
Hystrichosphaeridium |
Hystrichosphaeridium trifurcatum
|
Nd |
Late Givetian |
|
Hystrichosphaeridium |
Hystrichosphaeridium trifurcatum
|
Nd |
Ordovician |
|
Hystrichosphaeridium |
Hystrichosphaeridium triplicativum
|
Nd |
Early Ordovician |
|
Hystrichosphaeridium |
Hystrichosphaeridium trispiculare
|
Nd |
Arenigian |
Caradocian |
Hystrichosphaeridium |
Hystrichosphaeridium trispinosum
|
Nd |
Silurian |
|
Hystrichosphaeridium |
Hystrichosphaeridium trisulcum
|
Nd |
Nd |
|
Hystrichosphaeridium |
Hystrichosphaeridium tshunense
|
Nd |
Middle Ordovician |
|
Hystrichosphaeridium |
Hystrichosphaeridium tuberatum
|
Nd |
Early Ordovician |
|
Hystrichosphaeridium |
Hystrichosphaeridium tuberosum
|
Nd |
Late Givetian |
|
Hystrichosphaeridium |
Hystrichosphaeridium veliferum
|
Nd |
Tremadocian |
|
Hystrichosphaeridium |
Hystrichosphaeridium venustum
|
W.Germany(Bavaria) |
Late Givetian |
|
Hystrichosphaeridium |
Hystrichosphaeridium viticulosum
|
Nd |
Middle Ordovician |
|
Hystrichosphaeridium |
Hystrichosphaeridium vitile
|
Nd |
Middle Ordovician |
|