Helosphaeridium |
Helosphaeridium echiniforme
|
Nd |
Llandoverian |
|
Helosphaeridium |
Helosphaeridium guttatum
|
Nd |
Frasnian |
|
Helosphaeridium |
Helosphaeridium latispinosum
|
Nd |
Ludlovian |
|
Helosphaeridium |
Helosphaeridium malvernense
|
Nd |
Wenlockian |
|
Helosphaeridium |
Helosphaeridium microclavatum
|
Nd |
Frasnian |
|
Helosphaeridium |
Helosphaeridium pseudodictyum
|
Nd |
Wenlockian |
Ludlovian |
Helosphaeridium |
Helosphaeridium rarum
|
Nd |
Arenigian |
|
Hemibaltisphaeridium |
Hemibaltisphaeridium
|
Nd |
Nd |
|
Hemibaltisphaeridium |
Hemibaltisphaeridium dedosmuertos
|
Nd |
Ludlovian |
|
Hemideunffia |
Hemideunffia
|
Nd |
Nd |
|
Hemideunffia |
Hemideunffia trifurcata
|
Nd |
Wenlockian |
|
Hemisphaerium |
Hemisphaerium
|
Nd |
Nd |
|
Hemisphaerium |
Hemisphaerium germanum
|
Nd |
Early Carboniferous |
|
Hemisphaerium |
Hemisphaerium inominatum
|
Nd |
Early Carboniferous |
|
Hemisphaerium |
Hemisphaerium novum
|
Nd |
Early Carboniferous |
|
Hemisphaerium |
Hemisphaerium punctatum
|
Nd |
Early Gondwana |
|
Hemisphaerium |
Hemisphaerium signum
|
Nd |
Early Carboniferous |
|