Genus Bisaccate forms
- Species total:
- 14
- Age range:
- 360 - 1.8 MA (obsolete dating)
- IRMNG:
- find
| Name | From | To | Age range |
|---|---|---|---|
| Bisaccate forms | Late Devonian | Late Tertiary |
|
| Bisaccate forms nonstriate | Early Permian | Early Permian |
|
| Bisaccate forms sp | Late Pennsylvanian | Virgilian |
|
| Bisaccate forms sp.1 | Virgilian | Virgilian |
|
| Bisaccate forms sp.2 | Virgilian | Virgilian |
|
| Bisaccate forms sp.3 | Virgilian | Virgilian |
|
| Bisaccate forms sp.4 | Virgilian | Virgilian |
|
| Bisaccate forms sp.A | Allegheny | Allegheny |
|
| Bisaccate forms sp.B | Allegheny | Allegheny |
|
| Bisaccate forms sp.C | Allegheny | Allegheny |
|
| Bisaccate forms sp.D | Allegheny | Allegheny |
|
| Bisaccate forms striate | Sakmarian | Oxfordian |
|
| Bisaccate forms type 1 | Late Pennsylvanian | Late Pennsylvanian |
|
| Bisaccate forms type 2 | Late Pennsylvanian | Late Pennsylvanian |
|