Goniosphaeridium |
Goniosphaeridium uncinatum
|
Belgium |
Llanvirnian |
|
Goniosphaeridium |
Goniosphaeridium uncinatum
|
England |
Tremadocian |
|
Goniosphaeridium |
Goniosphaeridium uncinatum
|
USSR(Estonian SSR) |
Early Ordovician |
|
Goniosphaeridium |
Goniosphaeridium uncinatum
|
Spain |
Early Gothlandian |
|
Gorgonisphaeridium |
Gorgonisphaeridium succinum
|
Nd |
Nd |
|
Gorgonisphaeridium |
Gorgonisphaeridium winslowiae
|
Nd |
Nd |
|
Gracilisphaeridium |
Gracilisphaeridium encantador
|
Ohio |
Late Llandoverian |
|
Gracilisphaeridium |
Gracilisphaeridium encantador
|
Kentucky |
Late Llandoverian |
|
Hemibaltisphaeridium |
Hemibaltisphaeridium dedosmuertos
|
Spain |
Ludlovian |
Early Gedinnian |
Hystrichosphaeridium |
Hystrichosphaeridium astarte
|
W.Germany |
Late Givetian |
|
Hystrichosphaeridium |
Hystrichosphaeridium brevifurcatum
|
Ohio |
Wenlockian |
|
Hystrichosphaeridium |
Hystrichosphaeridium coniferum
|
W.Germany |
Late Givetian |
|
Hystrichosphaeridium |
Hystrichosphaeridium cristatum
|
Nd |
Nd |
|
Hystrichosphaeridium |
Hystrichosphaeridium denticulatum
|
Nd |
Nd |
|
Hystrichosphaeridium |
Hystrichosphaeridium denticulatum
|
Nd |
Nd |
|
Hystrichosphaeridium |
Hystrichosphaeridium eisenackii
|
Nd |
Nd |
|
Hystrichosphaeridium |
Hystrichosphaeridium erraticum
|
Nd |
Nd |
|