Pterospermella |
Pterospermella pertonensis
|
Nd |
Ludlovian |
|
Pterospermella |
Pterospermella pluriparietes
|
Nd |
Portlandian |
|
Pterospermella |
Pterospermella prisca
|
Nd |
Kazanian |
|
Pterospermella |
Pterospermella pterina
|
Nd |
Miocene |
|
Pterospermella |
Pterospermella radiata
|
Nd |
Late Devonian |
|
Pterospermella |
Pterospermella rajada
|
Nd |
Emsian |
|
Pterospermella |
Pterospermella reticulata
|
Nd |
Late Gedinnian |
|
Pterospermella |
Pterospermella scrubosa
|
Nd |
Silurian |
|
Pterospermella |
Pterospermella simica
|
Nd |
Late Riphean |
|
Pterospermella |
Pterospermella sinica
|
Nd |
Devonian |
|
Pterospermella |
Pterospermella solida
|
Nd |
Early Cambrian |
|
Pterospermella |
Pterospermella solis
|
Nd |
Late Devonian |
|
Pterospermella |
Pterospermella spinosa
|
Nd |
Senonian |
|
Pterospermella |
Pterospermella tenellula
|
Nd |
Frasnian |
|
Pterospermella |
Pterospermella timofeevii
|
Nd |
Couvinian |
|
Pterospermella |
Pterospermella tranvikensis
|
Nd |
Ordovician |
|
Pterospermella |
Pterospermella typicaus
|
Nd |
Cambrian |
|