Alethopteris
Photographed by Michael A. Klimetz
[Frond Impression in Siltstone]

Pennsylvanian

PENNSYLVANIA
Photographed by Michael A. Klimetz
Alethoperis serlii

[Frond Impressions in Shale]

Pennsylvanian

St. Clair
PENNSYLVANIA
Alethoperis decurrens

[Frond Impression in Siltstone]

Carboniferous-Westphalian

Upper Silesia
POLAND
Photographed by Michael A. Klimetz
Photographed by Michael P. Klimetz

Alethoperis serlii

[Pyrophyllitized Frond Impressions in Shale]

Pennsylvanian

St. Clair
PENNSYLVANIA
Photographed by Michael P. Klimetz

Alethoperis serlii

[Pyrophyllitized Frond Impressions in Shale]

Pennsylvanian

St. Clair
PENNSYLVANIA
Photographed by Michael P. Klimetz

Alethoperis grandini

Stranger Formation - Tonganoxie Sandstone Member
Pennsylvanian - Virgilian

Franklin County
KANSAS
Photographed by Michael P. Klimetz

Alethoperis grandini

Stranger Formation - Tonganoxie Sandstone Member
Pennsylvanian - Virgilian

Franklin County
KANSAS
Photographed by Michael P. Klimetz

Alethoperis grandini

Stranger Formation - Tonganoxie Sandstone Member
Pennsylvanian - Virgilian

Franklin County
KANSAS
Photographed by Michael P. Klimetz

Alethoperis grandini

Stranger Formation - Tonganoxie Sandstone Member
Pennsylvanian - Virgilian

Franklin County
KANSAS
Photographed by Michael P. Klimetz

Alethoperis grandini

Stranger Formation - Tonganoxie Sandstone Member
Pennsylvanian - Virgilian

Franklin County
KANSAS
Photographed by Michael P. Klimetz

Alethoperis serlii

Llewellyn Formation
Pennsylvanian

Schyulkill County
PENNSYLVANIA
Photographed by Michael P. Klimetz

Alethoperis serlii

Llewellyn Formation
Pennsylvanian

Schyulkill County
PENNSYLVANIA
​Photographed by Michael P. Klimetz

Alethoperis serlii

Llewellyn Formation
Pennsylvanian

Schyulkill County
PENNSYLVANIA
​​Photographed by Michael P. Klimetz

Alethoperis serlii

Llewellyn Formation
Pennsylvanian

Schyulkill County
PENNSYLVANIA
​Photographed by Michael P. Klimetz

Alethoperis serlii

Llewellyn Formation
Pennsylvanian

Schyulkill County
PENNSYLVANIA
Collected by Michael A. Klimetz

Photographed by Michael P. Klimetz

Alethoperis serlii

Llewellyn Formation
Pennsylvanian

St. Claire

Schyulkill County
PENNSYLVANIA
Collected by Michael A. Klimetz

Photographed by Michael P. Klimetz

Alethoperis serlii

Llewellyn Formation
Pennsylvanian

St. Claire

Schyulkill County
PENNSYLVANIA
Collected by Michael A. Klimetz

Photographed by Michael P. Klimetz

Alethoperis serlii

Llewellyn Formation
Pennsylvanian

St. Claire

Schyulkill County
PENNSYLVANIA
Collected by Michael A. Klimetz

Photographed by Michael P. Klimetz

Alethoperis serlii

Llewellyn Formation
Pennsylvanian

St. Claire

Schyulkill County
PENNSYLVANIA
Collected by Michael A. Klimetz

Photographed by Michael P. Klimetz

Alethoperis serlii

Llewellyn Formation
Pennsylvanian

St. Claire

Schyulkill County
PENNSYLVANIA