Acanthochitina |
Acanthochitina barbata
|
Nd |
Nd |
|
Acanthochitina |
Acanthochitina merga
|
Oklahoma |
Late Ordovician |
|
Acanthochitina |
Acanthochitina secunda
|
E.Germany |
Middle Ordovician |
|
Aleurichitina |
Aleurichitina
|
Nd |
Nd |
|
Aleurichitina |
Aleurichitina erincea
|
Nd |
Nd |
|
Aleurichitina |
Aleurichitina holosphaerica
|
Baltic |
Ordovician |
Silurian |
Aleurichitina |
Aleurichitina juglandiformis
|
Sweden |
Caradocian |
|
Alpenachitina |
Alpenachitina bifurcata
|
Nd |
Nd |
|
Alpenachitina |
Alpenachitina eisenacki
|
Nd |
Nd |
|
Alpenachitina |
Alpenachitina ramosi
|
Brazil(Goias) |
Early Devonian |
|
Amphorachitina |
Amphorachitina bohemica
|
Czechoslovakia |
Silurian |
|
Amphorachitina |
Amphorachitina conifunda
|
Nd |
Nd |
|
Amphorachitina |
Amphorachitina elongata
|
Nd |
Nd |
|
Amphorachitina |
Amphorachitina inflata
|
Nd |
Nd |
|
Amphorachitina |
Amphorachitina irregularis
sp. nov. |
Nd |
Nd |
|
Amphorachitina |
Amphorachitina veligera
|
Africa(Sahara) |
Arenigian |
Llandeilian |
Ampullachitina |
Ampullachitina erichseni
|
Brazil(Para) |
Silurian |
Devonian |