Gorgonisphaeridium |
Gorgonisphaeridium echinodermum
|
Belgium |
Tarannon |
|
Guttatisphaeridium |
Guttatisphaeridium
|
Ohio |
Late Devonian |
Early Mississippian |
Guttatisphaeridium |
Guttatisphaeridium pandum
|
Ohio |
Famennian |
|
Leiofusa |
Leiofusa muelleri
|
Brazil(Maranhao) |
Silurian |
|
Leiofusa |
Leiofusa oblonga
|
Germany |
Ordovician |
|
Leiofusa |
Leiofusa squama
|
Algeria |
Tremadocian |
|
Leiosphaera |
Leiosphaera reticulata
|
Baltic |
Ordovician |
|
Leiosphaeridia |
Leiosphaeridia granulosa
|
Canada(Alberta) |
Late Devonian |
|
Leiosphaeridia |
Leiosphaeridia minuta
|
Canada(Alberta) |
Late Devonian |
|
Leiosphaeridia |
Leiosphaeridia papillata
|
Canada(Alberta) |
Late Devonian |
|
Leiosphaeridia |
Leiosphaeridia pristina
|
India(Uttar Pradesh) |
Cambrian |
|
Leiovalia |
Leiovalia muelleri
|
Brazil(Maranhao) |
Silurian |
|
Leiovalia |
Leiovalia oblonga
|
Germany |
Ordovician |
|
Melikeriopalla |
Melikeriopalla amydra
|
Indiana |
Late Wenlockian |
|
Micrhystridium |
Micrhystridium
|
Ohio |
Late Devonian |
Early Mississippian |
Micrhystridium |
Micrhystridium asymmetricum
|
Ohio |
Frasnian |
|
Micrhystridium |
Micrhystridium asymmetricum
|
Ohio |
Late Devonian |
Early Mississippian |