Bulbochitina |
Bulbochitina
|
Nd |
Nd |
|
Bursachitina |
Bursachitina
|
Nd |
Nd |
|
Calpichitina |
Calpichitina
|
Canada(Eastern) |
Late Ordovician |
|
Calpichitina |
Calpichitina lata
|
Kentucky |
Ordovician |
|
Calpichitina |
Calpichitina lata
|
Ohio |
Ordovician |
|
Calpichitina |
Calpichitina lenticularis
|
Nd |
Nd |
|
Cingulochitina |
Cingulochitina
|
Nd |
Nd |
|
Cladochitina |
Cladochitina
|
Nd |
Nd |
|
Clathrochitina |
Clathrochitina
|
Nd |
Nd |
|
Clathrochitina |
Clathrochitina concinna
|
Nd |
Nd |
|
Conochitina |
Conochitina
|
Missouri |
Ashgillian |
|
Conochitina |
Conochitina capitata
|
Nd |
Nd |
|
Conochitina |
Conochitina clavaherculi
|
Nd |
Nd |
|
Conochitina |
Conochitina dolosa
|
Nd |
Nd |
|
Conochitina |
Conochitina elegans
|
Nd |
Nd |
|
Conochitina |
Conochitina minnesotensis
|
Nd |
Nd |
|
Conochitina |
Conochitina pachycephala
|
Nd |
Nd |
|