Ovum |
Ovum hispidum
|
Baltic |
Ashgillian |
Llandoverian |
Peteinosphaeridium |
Peteinosphaeridium bergstroemii
|
Baltic |
Middle Ordovician |
Late Ordovician |
Peteinosphaeridium |
Peteinosphaeridium nudum
|
Sweden |
Middle Ordovician |
Late Ordovician |
Peteinosphaeridium |
Peteinosphaeridium nudum
|
USSR(Estonian SSR) |
Middle Ordovician |
Late Ordovician |
Peteinosphaeridium |
Peteinosphaeridium trifurcatum
|
Sweden |
Middle Ordovician |
Late Ordovician |
Peteinosphaeridium |
Peteinosphaeridium trifurcatum
|
USSR(Estonian SSR) |
Middle Ordovician |
Late Ordovician |
Veryhachium |
Veryhachium balticum
|
Baltic |
Middle Ordovician |
Late Ordovician |
Veryhachium |
Veryhachium oligospinosum
|
Baltic |
Middle Ordovician |
Late Ordovician |
Veryhachium |
Veryhachium polygonale
|
Baltic |
Middle Ordovician |
Late Ordovician |