Hystrichosphaeridium |
Hystrichosphaeridium williereae
|
Nd |
Silurian |
|
Hystrichosphaeridium |
Hystrichosphaeridium wimanii
|
Nd |
Llandoverian |
|
Hystrichosphaeridium |
Hystrichosphaeridium zonale
|
Nd |
Early Ordovician |
|
Hystrichotriangulatum |
Hystrichotriangulatum
|
Nd |
Nd |
|
Hystrichotriangulatum |
Hystrichotriangulatum convexum
|
Nd |
Early Ordovician |
|
Iberosphaeridium |
Iberosphaeridium
|
Nd |
Nd |
|
Iberosphaeridium |
Iberosphaeridium almadraba
|
Nd |
Late Ludlovian |
Early Gedinnian |
Impletosphaeridium |
Impletosphaeridium
|
Nd |
Nd |
|
Impletosphaeridium |
Impletosphaeridium primordiale
|
Nd |
Ordovician |
|
Impluviculus |
Impluviculus
|
Nd |
Nd |
|
Impluviculus |
Impluviculus campidanus
|
Nd |
Late Cambrian |
Early Ordovician |
Impluviculus |
Impluviculus cleae
|
Nd |
Tremadocian |
|
Impluviculus |
Impluviculus lenticularis
|
Nd |
Tremadocian |
|
Impluviculus |
Impluviculus milonii
|
Nd |
Tremadocian |
|
Impluviculus |
Impluviculus robustus
|
Nd |
Tremadocian |
|
Impluviculus |
Impluviculus stellaris
|
Nd |
Tremadocian |
|
Impluviculus |
Impluviculus stellus
|
Nd |
Tremadocian |
|