Leiosphaeridia |
Leiosphaeridia wimanii
|
Sweden |
Vendian |
|
Protoleiosphaeridium |
Protoleiosphaeridium wimanii
|
Sweden |
Vendian |
|
Baltisphaeridium |
Baltisphaeridium ohioense
|
USA |
Late Devonian |
|
Hystrichosphaeridium |
Hystrichosphaeridium ohioense
|
USA |
Late Devonian |
|
Tasmanites |
Tasmanites primigenus
|
USSR |
Ordovician |
|
Leiosphaeridia |
Leiosphaeridia disca
|
USSR |
Late Silurian |
|
Baltisphaeridium |
Baltisphaeridium tschunense
|
USSR |
Middle Ordovician |
|
Hystrichosphaeridium |
Hystrichosphaeridium tshunense
|
USSR |
Middle Ordovician |
|
Leiosphaeridium |
Leiosphaeridium discum
|
USSR |
Late Silurian |
|
Perisaccus |
Perisaccus primigenus
|
USSR |
Ordovician |
|
Leiosphaeridia |
Leiosphaeridia communis
|
USSR(Baltic) |
Late Ordovician |
|
Leiosphaeridia |
Leiosphaeridia trivialis
|
USSR(Baltic) |
Late Ordovician |
|
Baltisphaeridium |
Baltisphaeridium hystrichoreticulatum
|
USSR(Baltic) |
Early Gothlandian |
|
Baltisphaeridium |
Baltisphaeridium conspersum
|
USSR(Baltic) |
Late Cambrian |
|
Baltisphaeridium |
Baltisphaeridium excisum
|
USSR(Baltic) |
Late Cambrian |
|
Baltisphaeridium |
Baltisphaeridium scaber
|
USSR(Baltic) |
Late Cambrian |
|
Leiosphaeridia |
Leiosphaeridia punctulosa
|
USSR(Baltic) |
Late Ordovician |
|