Hystrichosphaeridium |
Hystrichosphaeridium longispinosum
|
Spain |
Early Gothlandian |
Middle Gothlandian |
Hystrichosphaeridium |
Hystrichosphaeridium longispinosum
|
Belgium |
Late Llandoverian |
Early Wenlockian |
Hystrichosphaeridium |
Hystrichosphaeridium longispinosum
|
Libya |
Early Gothlandian |
|
Hystrichosphaeridium |
Hystrichosphaeridium polygonale
|
Sweden |
Late Llandoverian |
|
Hystrichosphaeridium |
Hystrichosphaeridium polygonale
|
Sweden |
Early Llandoverian |
|
Hystrichosphaeridium |
Hystrichosphaeridium polygonale
|
Nd |
Ordovician |
|
Hystrichosphaeridium |
Hystrichosphaeridium polygonale
|
England |
Wenlockian |
Ludlovian |
Hystrichosphaeridium |
Hystrichosphaeridium polygonale
|
Canada(NWT,Franklin) |
Ashgillian |
Wenlockian |
Hystrichosphaeridium |
Hystrichosphaeridium ramusculosum
|
Worldwide |
Early Llandoverian |
Gedinnian |
Hystrichosphaeridium |
Hystrichosphaeridium sp. Eise.,1938
sp. nov. |
Kentucky |
Nd |
|
Hystrichosphaeridium |
Hystrichosphaeridium sp. Eise.,1938
sp. nov. |
England |
Wenlockian |
|
Hystrichosphaeridium |
Hystrichosphaeridium sp. Eise.,1951
sp. nov. |
Saudi Arabia |
Early Gothlandian |
|
Hystrichosphaeridium |
Hystrichosphaeridium sp. Eise.,1951
sp. nov. |
Ohio |
Tarannon |
|
Hystrichosphaeridium |
Hystrichosphaeridium sp. Eise.,1951
sp. nov. |
Spain |
Early Gothlandian |
Middle Gothlandian |
Hystrichosphaeridium |
Hystrichosphaeridium sp. Eise.,1951
sp. nov. |
Belgium |
Late Llandoverian |
Early Wenlockian |
Hystrichosphaeridium |
Hystrichosphaeridium sp. Eise.,1951
sp. nov. |
Libya |
Early Gothlandian |
|
Leiofusa |
Leiofusa algerensis
sp. nov. |
Ohio |
Nd |
|