Rhabdochitina |
Rhabdochitina parvicolla
|
USSR(Yaroslav) |
Arenigian |
Middle Ordovician |
Rhabdochitina |
Rhabdochitina truncata
|
France(Aquitaine) |
Llandeilian |
|
Rhabdochitina |
Rhabdochitina virgata
|
France(Aquitaine) |
Llandeilian |
|
Sagenachitina |
Sagenachitina oblonga
|
Nd |
Nd |
|
Sagenachitina |
Sagenachitina striata
|
Nd |
Nd |
|
Sagenachitina |
Sagenachitina sylvanica
|
Oklahoma |
Late Ordovician |
|
Siphonochitina |
Siphonochitina clavata
|
Nd |
Nd |
|
Siphonochitina |
Siphonochitina formosa
|
Nd |
Nd |
|
Siphonochitina |
Siphonochitina pellucida
|
Nd |
Nd |
|
Siphonochitina |
Siphonochitina robusta
|
Nd |
Nd |
|
Siphonochitina |
Siphonochitina tenuicollis
|
Nd |
Nd |
|
Sphaerochitina |
Sphaerochitina acanthifera
|
Nd |
Nd |
|
Sphaerochitina |
Sphaerochitina actonica
|
Nd |
Nd |
|
Sphaerochitina |
Sphaerochitina amazonica
|
Brazil(Para) |
Early Gothlandian |
|
Sphaerochitina |
Sphaerochitina armillata
|
Algeria |
Early Devonian |
|
Sphaerochitina |
Sphaerochitina bifurcata
|
Illinois |
Early Devonian |
|
Sphaerochitina |
Sphaerochitina brevicollis
|
Algeria |
Ordovician |
|