Sphaerochitina |
Sphaerochitina erecta
sp. nov. |
USSR(Ukrainian SSR) |
Late Ludlovian |
|
Sphaerochitina |
Sphaerochitina robusta
|
USSR(Ukrainian SSR) |
Late Ludlovian |
|
Sphaerochitina |
Sphaerochitina sphaerocephala
|
USSR(Ukrainian SSR) |
Late Ludlovian |
|
Sphaerochitina |
Sphaerochitina sphaerocephala
|
USSR(Ukrainian SSR) |
Late Ludlovian |
|
Trachelomonas |
Trachelomonas bacillifera
|
Nd |
Nd |
|
Trachelomonas |
Trachelomonas clavata
|
Nd |
Nd |
|
Trachelomonas |
Trachelomonas sp
|
Nd |
Nd |
|
Trachelomonas |
Trachelomonas subglobosa
|
Nd |
Nd |
|
Wetzeliella |
Wetzeliella articulata
|
USSR(Siberia) |
Late Eocene |
Early Oligocene |
Wetzeliella |
Wetzeliella clathrata
|
Belgium |
Late Eocene |
|