Pterospermella |
Pterospermella flosdevonica
|
Belgium |
Frasnian |
|
Pterospermella |
Pterospermella flosdevonica
|
Spain |
Early Devonian |
|
Pterospermella |
Pterospermella flosdevonica
|
Spain |
Late Gothlandian |
|
Pterospermella |
Pterospermella ginginensis
|
Australia(W.Australia) |
Senonian |
|
Pterospermella |
Pterospermella ginginensis
|
California |
Danian |
|
Pterospermella |
Pterospermella goslarensis
|
E.Germany |
Liassic |
|
Pterospermella |
Pterospermella guapita
|
Spain |
Middle Siegenian |
Emsian |
Pterospermella |
Pterospermella hartii
|
Belgium |
Ypresian |
|
Pterospermella |
Pterospermella hartii
|
England(Yorkshire) |
Oxfordian |
|
Pterospermella |
Pterospermella heliantoides
|
Belgium |
Ypresian |
|
Pterospermella |
Pterospermella heol
sp. nov. |
Tunisia |
Devonian |
|
Pterospermella |
Pterospermella hermosita
|
Spain |
Emsian |
|
Pterospermella |
Pterospermella hermosita
|
France(Ille-et-Vilaine) |
Ludlovian |
|
Pterospermella |
Pterospermella hermosita
|
Africa(Sahara) |
Emsian |
|
Pterospermella |
Pterospermella hermosita
|
Africa(Sahara) |
Givetian |
|
Pterospermella |
Pterospermella macroptera
|
E.Germany |
Portlandian |
|
Pterospermella |
Pterospermella martinii
|
Spain |
Ludlovian |
|