Cramerochitina |
Cramerochitina retracta
|
USSR(Estonian SSR) |
Middle Ordovician |
|
Cyathochitina |
Cyathochitina agrestis
|
Oklahoma |
Late Ordovician |
|
Cyathochitina |
Cyathochitina agrestis
|
Oklahoma |
Late Ordovician |
|
Cyathochitina |
Cyathochitina alata
|
Nd |
Nd |
|
Cyathochitina |
Cyathochitina baculiformis
|
Nd |
Nd |
|
Cyathochitina |
Cyathochitina brasilica
|
Nd |
Nd |
|
Cyathochitina |
Cyathochitina calix
|
Nd |
Nd |
|
Cyathochitina |
Cyathochitina campanulaeformis
|
Nd |
Nd |
|
Cyathochitina |
Cyathochitina caputoi
|
Nd |
Nd |
|
Cyathochitina |
Cyathochitina conica
|
Nd |
Nd |
|
Cyathochitina |
Cyathochitina dispar
|
Nd |
Nd |
|
Cyathochitina |
Cyathochitina djadoensis
|
Nigeria |
Late Ordovician |
|
Cyathochitina |
Cyathochitina effusa
|
France(Aquitaine) |
Llandeilian |
|
Cyathochitina |
Cyathochitina fistulosa
|
Algeria |
Ordovician |
Gothlandian |
Cyathochitina |
Cyathochitina fusiformis
|
Nigeria |
Late Ordovician |
|
Cyathochitina |
Cyathochitina granulata
|
France(Aquitaine) |
Llandeilian |
|
Cyathochitina |
Cyathochitina hyalophrys
|
Nd |
Nd |
|