Acanthochitina |
Acanthochitina barbata
|
Europe |
Late Caradocian |
Early Ashgillian |
Acanthochitina |
Acanthochitina barbata
|
North America |
Late Caradocian |
Early Ashgillian |
Alpenachitina |
Alpenachitina eisenacki
|
North America |
Eifelian |
Frasnian |
Alpenachitina |
Alpenachitina eisenacki
|
South America |
Eifelian |
Frasnian |
Amphorachitina |
Amphorachitina conifundus
|
Africa |
Tremadocian |
|
Ancyrochitina |
Ancyrochitina aequoris
|
North America |
Middle Givetian |
Early Frasnian |
Ancyrochitina |
Ancyrochitina alaticornis
|
Europe |
Middle Caradocian |
Late Caradocian |
Ancyrochitina |
Ancyrochitina ancyrea
|
Europe |
Late Llandoverian |
Middle Pridolian |
Ancyrochitina |
Ancyrochitina ansarviensis
|
Europe |
Early Ludlovian |
|
Ancyrochitina |
Ancyrochitina bulmani
|
Europe |
Early Caradocian |
Middle Caradocian |
Ancyrochitina |
Ancyrochitina cornigera
|
North America |
Givetian |
|
Ancyrochitina |
Ancyrochitina desmea
|
Europe |
Wenlockian |
|
Ancyrochitina |
Ancyrochitina gutnica
|
Europe |
Wenlockian |
|
Ancyrochitina |
Ancyrochitina hamiltonensis
|
North America |
Givetian |
|
Ancyrochitina |
Ancyrochitina langei
|
Africa |
Middle Pragian |
Late Givetian |
Ancyrochitina |
Ancyrochitina langei
|
South America |
Middle Pragian |
Late Frasnian |
Ancyrochitina |
Ancyrochitina merga
|
North America |
Early Ashgillian |
Middle Ashgillian |