Dorsennidium |
Dorsennidium vesiculospinum
|
Sweden(Gotland) |
Late Ordovician |
|
Dorsennidium |
Dorsennidium vesiculospinum
|
Sweden(Gotland) |
Late Ordovician |
|
Dorsennidium |
Dorsennidium vesiculospinum
|
Sweden(Gotland) |
Late Ordovician |
|
Frankea |
Frankea liujingense
|
USSR(Baltic) |
Late Cretaceous |
|
Frankea |
Frankea liujingense
|
China(Kwangsi) |
Early Devonian |
|
Hystrichotriangulatum |
Hystrichotriangulatum
|
Nd |
Nd |
|
Impluviculus |
Impluviculus
|
Nd |
Nd |
|
Multiplicisphaeridium |
Multiplicisphaeridium cruciatum
|
USSR(Baltic) |
Late Cretaceous |
|
Simsangia |
Simsangia
|
Nd |
Nd |
|
Tetraveryhachium |
Tetraveryhachium
|
France |
Wenlockian |
|
Veryhachium |
Veryhachium andamanicum
|
Nd |
Nd |
|
Veryhachium |
Veryhachium antiquum
|
Nd |
Nd |
|
Veryhachium |
Veryhachium arasanicum
|
Nd |
Nd |
|
Veryhachium |
Veryhachium arcatum
|
Nd |
Nd |
|
Veryhachium |
Veryhachium asfalum
|
USSR |
Silurian |
|
Veryhachium |
Veryhachium asymmetrospinosum
|
USSR(Estonian SSR) |
Middle Ordovician |
|
Veryhachium |
Veryhachium augustum
|
Nd |
Nd |
|