Acanthodiacrodium |
Acanthodiacrodium minimum
|
Algeria |
Tremadocian |
|
Priscotheca |
Priscotheca minima
|
Algeria |
Tremadocian |
|
Acanthodiacrodium |
Acanthodiacrodium raium
|
Algeria |
Tremadocian |
|
Priscotheca |
Priscotheca raia
|
Algeria |
Tremadocian |
|
Eupoikilofusa |
Eupoikilofusa squama
|
Algeria |
Tremadocian |
|
Leiofusa |
Leiofusa squama
|
Algeria |
Tremadocian |
|
Goniosphaeridium |
Goniosphaeridium spinosum
|
Algeria |
Late Ordovician |
|
Polygonium |
Polygonium spinosum
|
Algeria |
Late Ordovician |
|
Micrhystridium |
Micrhystridium gracile
|
Argentina(Santiago) |
Late Gothlandian |
|
Polygonium |
Polygonium gracile
|
Argentina(Santiago) |
Late Gothlandian |
|
Baltisphaeridium |
Baltisphaeridium sedecimspinosum
|
Argentina(Santiago) |
Late Gothlandian |
|
Dictyotidium |
Dictyotidium reticulatum
|
Baltic |
Ordovician |
|
Leiosphaera |
Leiosphaera reticulata
|
Baltic |
Ordovician |
|
Comasphaeridium |
Comasphaeridium campoae
|
Belgium |
Tournaisian |
|
Micrhystridium |
Micrhystridium campoae
|
Belgium |
Tournaisian |
|
Gorgonisphaeridium |
Gorgonisphaeridium echinodermum
|
Belgium |
Tarannon |
|
Baltisphaeridium |
Baltisphaeridium echinodermum
|
Belgium |
Tarannon |
|