Perotrilites |
Perotrilites bifurcatus
|
Iowa |
Givetian |
|
Perotrilites |
Perotrilites bifurcatus
|
Canada(Arctic) |
Givetian |
|
Perotrilites |
Perotrilites conatus
|
W.Germany |
Eifelian |
|
Perotrilites |
Perotrilites conatus
|
Canada(Arctic) |
Givetian |
|
Perotrilites |
Perotrilites ergatus
|
Spitsbergen |
Emsian |
|
Perotrilites |
Perotrilites eximius
|
Spitsbergen |
Emsian |
|
Perotrilites |
Perotrilites pannuceus
|
Spitsbergen |
Emsian |
|
Phyllothecotriletes |
Phyllothecotriletes rotundus
|
Belgium |
Early Givetian |
|
Procoronaspora |
Procoronaspora ambigua
|
Germany |
Early Emsian |
|
Pseudosporochnus |
Pseudosporochnus nodosus
|
Belgium |
Early Givetian |
|
Punctatisporites |
Punctatisporites confossus
|
W.Germany |
Eifelian |
|
Punctatisporites |
Punctatisporites glaber
|
Spitsbergen |
Late Downtonian |
Dittonian |
Punctatisporites |
Punctatisporites laevigatus
|
Spitsbergen |
Late Downtonian |
Dittonian |
Radiaspora |
Radiaspora
|
Australia |
Frasnian |
|
Radiizonates |
Radiizonates spinosus
|
France(Maine-et-Loire) |
Middle Siegenian |
Late Siegenian |
Reticulatisporites |
Reticulatisporites emsiensis
|
Algeria |
Siegenian |
|
Reticulatisporites |
Reticulatisporites emsiensis
|
Spitsbergen |
Emsian |
|