Acanthotriletes |
Acanthotriletes crassus
|
USSR(Leningrad) |
Early Gothlandian |
|
Lophotriletes |
Lophotriletes crassus
|
USSR(Leningrad) |
Early Gothlandian |
|
Acanthodiacrodium |
Acanthodiacrodium echinatum
|
USSR(Leningrad) |
Early Gothlandian |
|
Azonomonoletes |
Azonomonoletes echinatus
|
USSR(Leningrad) |
Early Gothlandian |
|
Baltisphaeridium |
Baltisphaeridium arrectum
|
USSR(Pre-Baltic) |
Early Ordovician |
Middle Ordovician |
Hystrichosphaeridium |
Hystrichosphaeridium arrectum
|
USSR(Pre-Baltic) |
Early Ordovician |
Middle Ordovician |
Leiopsophosphaera |
Leiopsophosphaera conglutinata
|
USSR(Pre-Baltic) |
Proterozoic |
Middle Ordovician |
Protoleiosphaeridium |
Protoleiosphaeridium conglutinatum
|
USSR(Pre-Baltic) |
Proterozoic |
Middle Ordovician |
Latoporata |
Latoporata crispata
|
USSR(Pre-Baltic) |
Middle Cambrian |
|
Archaeohystrichosphaeridium |
Archaeohystrichosphaeridium crispatum
|
USSR(Pre-Baltic) |
Middle Cambrian |
|
Multiplicisphaeridium |
Multiplicisphaeridium cristatum
|
USSR(Pre-Baltic) |
Middle Cambrian |
|
Veryhachium |
Veryhachium cuneidentatum
|
USSR(Pre-Baltic) |
Middle Cambrian |
|
Archaeohystrichosphaeridium |
Archaeohystrichosphaeridium cuneidentatum
|
USSR(Pre-Baltic) |
Middle Cambrian |
|
Baltisphaeridium |
Baltisphaeridium mickwitzi
|
USSR(Pre-Baltic) |
Late Cambrian |
|
Archaeohystrichosphaeridium |
Archaeohystrichosphaeridium mickwitzii
|
USSR(Pre-Baltic) |
Late Cambrian |
|
Trachysphaeridium |
Trachysphaeridium minutissimum
|
USSR(Pre-Baltic) |
Early Cambrian |
|
Leioligotriletes |
Leioligotriletes minutissimus
|
USSR(Pre-Baltic) |
Early Cambrian |
|