Pirumella |
Pirumella lepidota
|
Nd |
Aptian |
Early Albian |
Pirumella |
Pirumella loeblichii
|
Nd |
Late Aptian |
Middle Albian |
Pirumella |
Pirumella longiporosa
|
Nd |
Albian |
Cenomanian |
Pirumella |
Pirumella loricata
|
Nd |
Albian |
|
Pirumella |
Pirumella mcnightii
|
Nd |
Tithonian |
|
Pirumella |
Pirumella miniaperta
|
Nd |
Albian |
|
Pirumella |
Pirumella multistrata
|
Nd |
Valanginian |
Barremian |
Pirumella |
Pirumella parva
|
Nd |
Danian |
Early Pleistocene |
Pirumella |
Pirumella patriciagreeleyae
|
Nd |
Barremian |
Albian |
Pirumella |
Pirumella patriciagreeleyae
|
Nd |
Early Barremian |
|
Pirumella |
Pirumella patriciagreeleyae
|
Nd |
Barremian |
Albian |
Pirumella |
Pirumella pinguis
|
Nd |
Early Oxfordian |
Middle Oxfordian |
Pirumella |
Pirumella piriformis
|
Nd |
Tithonian |
|
Pirumella |
Pirumella porosa
|
Nd |
Albian |
Cenomanian |
Pirumella |
Pirumella porosa
|
Nd |
Late Albian |
Cenomanian |
Pirumella |
Pirumella porosa
|
Nd |
Albian |
Cenomanian |
Pirumella |
Pirumella quiltyi
|
Nd |
Albian |
|