Tripartina |
Tripartina sp
|
USSR(Urals) |
Callovian |
Valanginian |
Tripartina |
Tripartina variabilis
|
USSR(Urals) |
Hettangian |
Toarcian |
Tripartina |
Tripartina variabilis
|
USSR(Urals) |
Early Bajocian |
|
Tripartina |
Tripartina variabilis
|
USSR(Urals) |
Late Bajocian |
|
Tripartina |
Tripartina velaria
|
USSR(Urals) |
Early Triassic |
|
Tripartina |
Tripartina velaria
|
USSR(Urals) |
Early Triassic |
|
Triquetrella |
Triquetrella angulosa
|
USSR(Urals) |
Bajocian |
|
Triquetrella |
Triquetrella cardiformis
|
USSR(Urals) |
Keuper |
|
Triquetrella |
Triquetrella colliculoides
|
USSR(Urals) |
Late Bajocian |
|
Triquetrella |
Triquetrella divaricata
|
USSR(Urals) |
Late Bajocian |
|
Triquetrella |
Triquetrella minuscula
|
USSR(Urals) |
Hettangian |
Toarcian |
Triquetrella |
Triquetrella trianguliformis
|
USSR(Urals) |
Aptian |
|
Tsugella |
Tsugella relativa
|
USSR(Urals) |
Aptian |
|
Tuberella |
Tuberella quadriformis
|
USSR(Urals) |
Aptian |
|
Tympanea |
Tympanea
|
USSR(Urals) |
Hettangian |
Toarcian |
Tympanea |
Tympanea gigantea
|
USSR(Urals) |
Bathonian |
|
Tympanea |
Tympanea obducta
|
USSR(Urals) |
Hettangian |
Toarcian |