Pterospermella |
Pterospermella cerebella
|
Nd |
Late Gedinnian |
|
Pterospermella |
Pterospermella chiquitina
|
Nd |
Middle Siegenian |
Emsian |
Pterospermella |
Pterospermella circumstriata
|
Nd |
Emsian |
|
Pterospermella |
Pterospermella crameri
|
Nd |
Ordovician |
|
Pterospermella |
Pterospermella culumbiella
|
Nd |
Llandoverian |
|
Pterospermella |
Pterospermella danica
|
Nd |
Danian |
|
Pterospermella |
Pterospermella dichlidosis
|
Nd |
Late Gedinnian |
|
Pterospermella |
Pterospermella elliptica
|
Nd |
Early Ludlovian |
|
Pterospermella |
Pterospermella eruptio
|
Nd |
Early Famennian |
|
Pterospermella |
Pterospermella eurypteris
|
Nd |
Aptian |
|
Pterospermella |
Pterospermella flosdevonica
|
Nd |
Frasnian |
|
Pterospermella |
Pterospermella foveolata
|
Nd |
Ludlovian |
|
Pterospermella |
Pterospermella fragalis
|
Nd |
Wenlockian |
|
Pterospermella |
Pterospermella ginginensis
|
Nd |
Senonian |
|
Pterospermella |
Pterospermella goslarensis
|
Nd |
Early Jurassic |
|
Pterospermella |
Pterospermella granulata
|
Nd |
Late Llandoverian |
Ludlovian |
Pterospermella |
Pterospermella guapita
|
Nd |
Middle Siegenian |
Emsian |