Hystrichosphaeridium |
Hystrichosphaeridium laevigatum
|
Nd |
Wenlockian |
Ludlovian |
Hystrichosphaeridium |
Hystrichosphaeridium williereae
|
Nd |
Llandoverian |
|
Hystrichosphaeridium |
Hystrichosphaeridium wimanii
|
Nd |
Tremadocian |
Ashgillian |
Multiplicisphaeridium |
Multiplicisphaeridium alloiteauii
|
Nd |
Tremadocian |
Givetian |
Multiplicisphaeridium |
Multiplicisphaeridium andrewsii
|
Nd |
Frasnian |
|
Multiplicisphaeridium |
Multiplicisphaeridium arbusculiferum
|
Nd |
Llandoverian |
Ludlovian |
Multiplicisphaeridium |
Multiplicisphaeridium asturiae
|
Nd |
Wenlockian |
Gedinnian |
Multiplicisphaeridium |
Multiplicisphaeridium barbarum
|
Nd |
Tremadocian |
Arenigian |
Multiplicisphaeridium |
Multiplicisphaeridium belmonte
|
Nd |
Ludlovian |
Gedinnian |
Multiplicisphaeridium |
Multiplicisphaeridium bifurcatum
|
Nd |
Llanvirnian |
Llandeilian |
Multiplicisphaeridium |
Multiplicisphaeridium bikidium
|
Nd |
Ludlovian |
|
Multiplicisphaeridium |
Multiplicisphaeridium birminghamense
|
Nd |
Late Llandoverian |
Wenlockian |
Multiplicisphaeridium |
Multiplicisphaeridium bonitum
|
Nd |
Ludlovian |
Siegenian |
Multiplicisphaeridium |
Multiplicisphaeridium borracherosum
|
Nd |
Late Llandoverian |
Ludlovian |
Multiplicisphaeridium |
Multiplicisphaeridium brazodesnudum
|
Nd |
Wenlockian |
Ludlovian |
Multiplicisphaeridium |
Multiplicisphaeridium brevifurcatum
|
Nd |
Early Llandoverian |
Ludlovian |
Multiplicisphaeridium |
Multiplicisphaeridium canadense
|
Nd |
Potsdamian |
|