Urochitina |
Urochitina
|
Bolivia |
Late Devonian |
|
Belonechitina |
Belonechitina
|
Canada |
Late Ordovician |
|
Angochitina |
Angochitina
|
Canada(Alberta) |
Late Devonian |
|
Calpichitina |
Calpichitina
|
Canada(Eastern) |
Late Ordovician |
|
Cyathochitina |
Cyathochitina kuckersiana
|
Canada(Eastern) |
Late Ordovician |
|
Desmochitina |
Desmochitina minor
|
Canada(Eastern) |
Late Ordovician |
|
Hercochitina |
Hercochitina
|
Canada(Eastern) |
Late Ordovician |
|
Hercochitina |
Hercochitina crickmayi
|
Canada(Eastern) |
Late Ordovician |
|
Plectochitina |
Plectochitina
|
Canada(Ontario) |
Early Silurian |
|
Spinachitina |
Spinachitina maennili
|
Canada(Ontario) |
Llandoverian |
|
Angochitina |
Angochitina sp
|
Canada(Ontario) |
Early Silurian |
|
Cyathochitina |
Cyathochitina campanulaeformis
|
Canada(Ontario) |
Late Ordovician |
|
Cyathochitina |
Cyathochitina calix
|
Estonia |
Middle Ordovician |
|
Cutichitina |
Cutichitina
|
Florida |
Llanvirnian |
|
Acanthochitina |
Acanthochitina cancellata
|
Kentucky |
Late Ordovician |
|
Belonechitina |
Belonechitina micracantha
|
Kentucky |
Ordovician |
|
Calpichitina |
Calpichitina lata
|
Kentucky |
Ordovician |
|