Bursachitina |
Bursachitina sp
|
Africa(Sahara) |
Silurian |
Devonian |
Bursachitina |
Bursachitina sp
|
Africa(Sahara) |
Silurian |
Devonian |
Bursachitina |
Bursachitina sp
|
Africa(Sahara) |
Silurian |
Devonian |
Bursachitina |
Bursachitina sp
|
Africa(Sahara) |
Silurian |
Devonian |
Bursachitina |
Bursachitina sp
|
Africa(Sahara) |
Silurian |
Devonian |
Bursachitina |
Bursachitina sp
|
Africa(Sahara) |
Silurian |
Devonian |
Bursachitina |
Bursachitina urna
|
Europe |
Caradocian |
Ludlovian |
Bursachitina |
Bursachitina urna
|
Africa(Sahara) |
Arenigian |
Caradocian |
Bursachitina |
Bursachitina urna
|
Czechoslovakia |
Pridolian |
|
Calpichitina |
Calpichitina minor
|
Europe |
Arenigian |
Caradocian |
Calpichitina |
Calpichitina minor
|
Baltic |
Llandeilian |
|
Calpichitina |
Calpichitina scabiosa
|
USA |
Caradocian |
|
Chitinozoa |
Chitinozoa sp
|
Africa(Sahara) |
Gothlandian |
|
Clathrochitina |
Clathrochitina aquitanica
|
Africa(Sahara) |
Arenigian |
Caradocian |
Clathrochitina |
Clathrochitina carmenchui
|
Africa(Sahara) |
Arenigian |
Caradocian |
Clathrochitina |
Clathrochitina clathrata
|
Europe |
Wenlockian |
|
Clathrochitina |
Clathrochitina eisenacki
|
Europe |
Caradocian |
|