Hystrichosphaeridium |
Hystrichosphaeridium oligofurcatum
|
Nd |
Late Llandoverian |
|
Hystrichosphaeridium |
Hystrichosphaeridium oligospinosum
|
Nd |
Silurian |
|
Hystrichosphaeridium |
Hystrichosphaeridium ordovicum
|
Nd |
Early Ordovician |
|
Hystrichosphaeridium |
Hystrichosphaeridium pateum
|
Nd |
Early Ordovician |
|
Hystrichosphaeridium |
Hystrichosphaeridium patriarchum
|
Nd |
Nd |
|
Hystrichosphaeridium |
Hystrichosphaeridium picorricum
|
Nd |
Middle Siegenian |
Emsian |
Hystrichosphaeridium |
Hystrichosphaeridium piriferum
|
Nd |
Late Llandoverian |
|
Hystrichosphaeridium |
Hystrichosphaeridium polygonale
|
Nd |
Silurian |
|
Hystrichosphaeridium |
Hystrichosphaeridium polyradiatum
|
USSR(Russian Platform) |
Middle Ordovician |
|
Hystrichosphaeridium |
Hystrichosphaeridium pterophorum
|
Nd |
Late Cretaceous |
|
Hystrichosphaeridium |
Hystrichosphaeridium pumile
|
Nd |
Late Cretaceous |
|
Hystrichosphaeridium |
Hystrichosphaeridium quadridactylites
|
Nd |
Frasnian |
|
Hystrichosphaeridium |
Hystrichosphaeridium quadriradiatum
|
Nd |
Early Ordovician |
|
Hystrichosphaeridium |
Hystrichosphaeridium ramusculosum
|
Nd |
Silurian |
|
Hystrichosphaeridium |
Hystrichosphaeridium ramusculosum
|
Canada |
Middle Devonian |
|
Hystrichosphaeridium |
Hystrichosphaeridium ramusculosum
|
Nd |
Silurian |
|
Hystrichosphaeridium |
Hystrichosphaeridium rigens
|
Nd |
Early Ordovician |
|