Pterospermopsimorpha |
Pterospermopsimorpha pileiformis
|
USSR(Yakut ASSR) |
|
|
Pterospermopsis |
Pterospermopsis danica
|
W.Germany |
Cretaceous |
|
Pterospermopsis |
Pterospermopsis flosdevonica
|
Belgium |
Devonian |
|
Pulvinosphaeridium |
Pulvinosphaeridium pulvinellum
|
Baltic |
Silurian |
|
Quadraditum |
Quadraditum fantasticum
|
Spain |
Silurian |
|
Quisquilites |
Quisquilites buckhornensis
|
Oklahoma |
Devonian |
|
Retisphaeridium |
Retisphaeridium dichamerum
|
Canada |
Cambrian |
|
Schismatosphaeridium |
Schismatosphaeridium perforatum
|
Netherlands |
Middle Gothlandian |
|
Sol |
Sol radians
|
Spain |
Silurian |
|
Staplinium |
Staplinium hexaeder
|
Canada |
Late Triassic |
|
Stictosphaeridium |
Stictosphaeridium sinapticuliferum
|
USSR |
Late Precambrian |
|
Trachydiacrodium |
Trachydiacrodium productum
|
Baltic |
Late Cambrian |
|
Trachysphaeridium |
Trachysphaeridium attenuatum
|
USSR(Vologda) |
Ordovician |
|
Trematosphaeridium |
Trematosphaeridium holtedahlii
|
USSR |
Late Precambrian |
|
Triangulina |
Triangulina alargada
|
Spain |
Silurian |
|
Trichosphaeridium |
Trichosphaeridium annolovaense
|
Baltic |
Middle Cambrian |
|
Turuchanica |
Turuchanica alara
|
Baltic |
Late Precambrian |
|