Sphaerochitina |
Sphaerochitina pilosa
|
Illinois |
Givetian |
|
Sphaerochitina |
Sphaerochitina pilosa
|
Europe |
Frasnian |
|
Sphaerochitina |
Sphaerochitina prussica
|
Europe |
Tremadocian |
Caradocian |
Sphaerochitina |
Sphaerochitina schwalbi
|
Illinois |
Givetian |
|
Sphaerochitina |
Sphaerochitina schwalbi
|
USA |
Givetian |
|
Sphaerochitina |
Sphaerochitina sphaerocephala
|
Europe |
Wenlockian |
Emsian |
Sphaerochitina |
Sphaerochitina sphaerocephala
|
Africa(Sahara) |
Gedinnian |
|
Sphaerochitina |
Sphaerochitina sphaerocephala
|
Africa(Sahara) |
Eifelian |
Famennian |
Spinachitina |
Spinachitina alata
|
Algeria |
Gothlandian |
|
Spinachitina |
Spinachitina conica
|
France(Aquitaine) |
Llandeilian |
|
Spinachitina |
Spinachitina cylindrica
|
Algeria |
Ordovician |
Gothlandian |
Spinachitina |
Spinachitina dispar
|
France(Aquitaine) |
Llandeilian |
|
Spinachitina |
Spinachitina elenitae
|
Spain |
Late Llandoverian |
Ludlovian |
Spinachitina |
Spinachitina fistulosa
|
Algeria |
Ordovician |
Gothlandian |
Spinachitina |
Spinachitina granulata
|
France(Aquitaine) |
Llandeilian |
|
Spinachitina |
Spinachitina hyalophrys
|
Ohio |
Late Ordovician |
|
Spinachitina |
Spinachitina hymenophora
|
France(Aquitaine) |
Llandeilian |
|