Tetrahedraletes |
Tetrahedraletes medinensis
sp. nov. |
England(Shropshire) |
Early Wenlockian |
|
Tetrahedraletes |
Tetrahedraletes medinensis
sp. nov. |
Wales(Dyfed) |
Early Rhuddanian |
|
Tetrahedraletes |
Tetrahedraletes medinensis
|
Wales(Dyfed) |
Hirnantian |
Early Telychian |
Tetrahedraletes |
Tetrahedraletes sp. Rich.,1988
sp. nov. |
Nd |
Nd |
|
Velatitetras |
Velatitetras
|
Wales(Dyfed) |
Late Rhuddanian |
|
Velatitetras |
Velatitetras laevigata
sp. nov. |
Wales(Dyfed) |
Late Rhuddanian |
|
Velatitetras |
Velatitetras laevigata
|
Wales(Dyfed) |
Hirnantian |
Rhuddanian |
Velatitetras |
Velatitetras reticulata
sp. nov. |
Wales(Dyfed) |
Rhuddanian |
|
Velatitetras |
Velatitetras reticulata
|
Wales(Dyfed) |
Hirnantian |
Aeronian |
Velatitetras |
Velatitetras rugulata
sp. nov. |
Wales(Dyfed) |
Early Rhuddanian |
|
Velatitetras |
Velatitetras sp.A Burg.,1991
sp. nov. |
Wales(Dyfed) |
Early Rhuddanian |
|