Cyathochitina |
Cyathochitina campanulaeformis
|
Canada(Arctic) |
Late Ordovician |
|
Cyathochitina |
Cyathochitina campanulaeformis
|
Nevada |
Early Silurian |
|
Cyathochitina |
Cyathochitina caputoi
|
Canada(Arctic) |
Late Ordovician |
|
Cyathochitina |
Cyathochitina caputoi
|
Nevada |
Late Ordovician |
Early Silurian |
Cyathochitina |
Cyathochitina kuckersiana
|
Canada(Arctic) |
Late Ordovician |
|
Desmochitina |
Desmochitina minor
|
Nevada |
Late Ordovician |
|
Eisenackitina |
Eisenackitina dolioliformis
|
Nevada |
Early Silurian |
|
Eisenackitina |
Eisenackitina ripae
sp. nov. |
Nevada |
Late Ordovician |
|
Eisenackitina |
Eisenackitina ripae
|
Canada(Arctic) |
Late Ordovician |
|
Eisenackitina |
Eisenackitina sp
|
Nevada |
Late Ordovician |
|
Eisenackitina |
Eisenackitina sp.1 Souf.& Acha.,2000
sp. nov. |
Nevada |
Late Ordovician |
|
Hercochitina |
Hercochitina crickmayi
|
Nevada |
Late Ordovician |
|
Hercochitina |
Hercochitina lindsayensis
|
Nevada |
Late Ordovician |
|
Hercochitina |
Hercochitina lindsayensis
|
Canada(Arctic) |
Late Ordovician |
|
Hercochitina |
Hercochitina minuta
|
Nevada |
Late Ordovician |
|
Hercochitina |
Hercochitina normalis
|
Nevada |
Late Ordovician |
|
Kalochitina |
Kalochitina multispinata
|
Nevada |
Late Ordovician |
|