Sphaerochitina |
Sphaerochitina nodulosa
|
Nd |
Nd |
|
Sphaerochitina |
Sphaerochitina pilosa
|
Nd |
Nd |
|
Sphaerochitina |
Sphaerochitina schwalbi
|
Nd |
Nd |
|
Sphaerochitina |
Sphaerochitina sphaerocephala
|
Nd |
Nd |
|
Sphaerochitina |
Sphaerochitina spinipes
|
Nd |
Nd |
|
Sphaerochitina |
Sphaerochitina valentini
|
Spain |
Ludlovian |
|
Spinachitina |
Spinachitina cervicornis
|
Nd |
Nd |
|
Spinachitina |
Spinachitina djalmai
|
Brazil(Para) |
Silurian |
|
Stephanochitina |
Stephanochitina africana
|
Nd |
Nd |
|
Stephanochitina |
Stephanochitina decora
|
Nd |
Nd |
|
Subulochitina |
Subulochitina
|
Nd |
Nd |
|
Subulochitina |
Subulochitina secunda
|
E.Germany |
Middle Ordovician |
|
Tanuchitina |
Tanuchitina bergstroemi
|
Nd |
Nd |
|
Tanuchitina |
Tanuchitina ontariensis
|
Nd |
Nd |
|
Tanuchitina |
Tanuchitina paraensis
|
Nd |
Nd |
|
Tanuchitina |
Tanuchitina proensinensis
|
Nd |
Nd |
|
Taugourdochitina |
Taugourdochitina
|
Nd |
Nd |
|