Acanthochitina |
Acanthochitina barbata
|
USSR(Estonian SSR) |
Ashgillian |
|
Ancyrochitina |
Ancyrochitina ancyrea
|
Baltic |
Ordovician |
|
Ancyrochitina |
Ancyrochitina ancyrea
|
Finland |
Caradocian |
|
Ancyrochitina |
Ancyrochitina barbata
|
E.Germany(Potsdam) |
Ordovician |
|
Ancyrochitina |
Ancyrochitina multiradiata
|
USSR(Estonian SSR) |
Caradocian |
|
Ancyrochitina |
Ancyrochitina multiradiata
|
Finland |
Caradocian |
|
Angochitina |
Angochitina capillata
|
USSR(Estonian SSR) |
Ashgillian |
|
Angochitina |
Angochitina capillata
|
E.Germany(Potsdam) |
Ordovician |
|
Angochitina |
Angochitina capillata
|
Sweden |
Early Ordovician |
Middle Ordovician |
Angochitina |
Angochitina capillata
|
Finland |
Caradocian |
|
Angochitina |
Angochitina capillata
|
E.Germany(Potsdam) |
Ordovician |
|
Bacisphaeridium |
Bacisphaeridium bacifer
|
USSR(Estonian SSR) |
Caradocian |
Ashgillian |
Baltisphaeridium |
Baltisphaeridium bacifer
|
Finland |
Caradocian |
|
Baltisphaeridium |
Baltisphaeridium bacifer
|
E.Germany(Potsdam) |
Ordovician |
|
Baltisphaeridium |
Baltisphaeridium cylindrosum
|
Sweden |
Middle Ordovician |
|
Baltisphaeridium |
Baltisphaeridium cylindrosum
|
E.Germany(Potsdam) |
Ordovician |
|
Baltisphaeridium |
Baltisphaeridium digitatum
|
Baltic |
Late Ordovician |
Early Gothlandian |