Synorisporites |
Synorisporites tripapillatus
|
England(Herefordshire) |
Early Downtonian |
|
Synorisporites |
Synorisporites tripapillatus
|
England(Worcestershire) |
Early Downtonian |
|
Synorisporites |
Synorisporites tripapillatus
|
Nd |
Early Pridolian |
|
Synorisporites |
Synorisporites verrucatus
|
Nd |
Wenlockian |
Pridolian |
Synorisporites |
Synorisporites verrucatus
|
England |
Early Downtonian |
|
Tasmanites |
Tasmanites avelinoi
|
Libya |
Late Llandoverian |
Early Devonian |
Tetrahedraletes |
Tetrahedraletes
|
Nd |
Nd |
|
Tetrahedraletes |
Tetrahedraletes medinensis
|
Scotland |
Sheinwoodian |
Homerian |
Tetrahedraletes |
Tetrahedraletes medinensis
|
England |
Early Gedinnian |
|
Tetrahedraletes |
Tetrahedraletes medinensis
|
Nd |
Caradocian |
Early Pridolian |
Tetraletes |
Tetraletes variabilis
|
Libya |
Late Ludfordian |
|
Tritonialetes |
Tritonialetes
|
Nd |
Nd |
|
Velatitetras |
Velatitetras
|
Nd |
Nd |
|
Velatitetras |
Velatitetras laevigata
|
Nd |
Nd |
|
Velatitetras |
Velatitetras reticulata
|
Nd |
Caradocian |
Early Gedinnian |
Velatitetras |
Velatitetras retimembrana
|
Nd |
Caradocian |
Gedinnian |
Velatitetras |
Velatitetras rugulata
|
Wales |
Llandoverian |
|