Sommerochitina |
Sommerochitina
|
|
Early Famennian |
|
Sommerochitina |
Sommerochitina langei
|
|
Early Famennian |
|
Spathachitina |
Spathachitina
|
Nd |
Nd |
|
Spathachitina |
Spathachitina cruzi
|
Nd |
Nd |
|
Sphaerochitina |
Sphaerochitina
|
Baltic |
Pridolian |
|
Sphaerochitina |
Sphaerochitina sphaerocephala
|
Baltic |
Pridolian |
|
Spinachitina |
Spinachitina
|
Estonia |
Early Caradocian |
|
Spinachitina |
Spinachitina cervicornis
|
Estonia |
Early Caradocian |
|
Steneyochitina |
Steneyochitina
|
Nd |
Nd |
|
Steneyochitina |
Steneyochitina ovatoelongata
|
Nd |
Nd |
|
Stephanochitina |
Stephanochitina
|
Nd |
Nd |
|
Stephanochitina |
Stephanochitina africana
|
Nd |
Nd |
|
Striatolagenochitina |
Striatolagenochitina
|
Nd |
Nd |
|
Striatolagenochitina |
Striatolagenochitina clava
|
Nd |
Nd |
|
Subulochitina |
Subulochitina
|
Nd |
Nd |
|
Subulochitina |
Subulochitina secunda
|
Nd |
Nd |
|
Tanuchitina |
Tanuchitina
|
Canada(Ontario) |
Middle Ordovician |
|