Ramochitina |
Ramochitina magnifica
|
Gondwanaland |
Emsian |
Early Eifelian |
Sagenachitina |
Sagenachitina oblonga
|
Nd |
Nd |
|
Sagenachitina |
Sagenachitina retifera
|
France(Normandie) |
Early Llanvirnian |
|
Siphonochitina |
Siphonochitina formosa
|
Baltic |
Early Llanvirnian |
|
Siphonochitina |
Siphonochitina formosa
|
Gondwanaland |
Early Llanvirnian |
|
Sphaerochitina |
Sphaerochitina gracqui
|
Nd |
Nd |
|
Sphaerochitina |
Sphaerochitina indecora
|
USSR(Estonian SSR) |
Late Wenlockian |
|
Sphaerochitina |
Sphaerochitina lycoperdoides
|
Baltic |
Late Homerian |
|
Sphaerochitina |
Sphaerochitina lycoperdoides
|
Gondwanaland |
Late Homerian |
|
Sphaerochitina |
Sphaerochitina macrostoma
|
Gondwanaland |
Famennian |
|
Sphaerochitina |
Sphaerochitina patula
|
Gondwanaland |
Early Pridolian |
|
Sphaerochitina |
Sphaerochitina sphaerocephala
|
Worldwide |
Late Ludfordian |
Pridolian |
Spinachitina |
Spinachitina cervicornis
|
Nd |
Harnagian |
Longvillian |
Spinachitina |
Spinachitina coronata
|
Nd |
Pushgillian |
Hirnantian |
Spinachitina |
Spinachitina fragilis
|
Baltic |
Early Rhuddanian |
|
Spinachitina |
Spinachitina fragilis
|
Gondwanaland |
Early Rhuddanian |
|
Spinachitina |
Spinachitina fragilis
|
Saudi Arabia |
Early Rhuddanian |
|