Rhabdochitina |
Rhabdochitina truncata
|
Europe |
Late Caradocian |
Early Llandoverian |
Rhabdochitina |
Rhabdochitina virgata
|
Europe |
Late Caradocian |
Early Llandoverian |
Sphaerochitina |
Sphaerochitina acanthifera
|
Europe |
Ludlovian |
|
Sphaerochitina |
Sphaerochitina acanthifera
|
Africa(Sahara) |
Ludlovian |
|
Sphaerochitina |
Sphaerochitina collinsoni
|
Iowa |
Middle Devonian |
|
Sphaerochitina |
Sphaerochitina collinsoni
|
USA |
Eifelian |
Givetian |
Sphaerochitina |
Sphaerochitina collinsoni
|
USA |
Eifelian |
Givetian |
Sphaerochitina |
Sphaerochitina cuvillieri
|
Africa(Sahara) |
Frasnian |
Famennian |
Sphaerochitina |
Sphaerochitina fenestrata
|
Algeria |
Late Devonian |
|
Sphaerochitina |
Sphaerochitina fenestrata
|
Africa(Sahara) |
Famennian |
Famennian |
Sphaerochitina |
Sphaerochitina fungiformis
|
Algeria |
Early Devonian |
|
Sphaerochitina |
Sphaerochitina fungiformis
|
Europe |
Tremadocian |
Ludlovian |
Sphaerochitina |
Sphaerochitina longicollis
|
Africa(Sahara) |
Llandoverian |
|
Sphaerochitina |
Sphaerochitina longicollis
|
Europe |
Siegenian |
|
Sphaerochitina |
Sphaerochitina longicollis
|
Algeria |
Late Llandoverian |
|
Sphaerochitina |
Sphaerochitina nodulosa
|
Illinois |
Givetian |
|
Sphaerochitina |
Sphaerochitina nodulosa
|
USA |
Givetian |
|