Carboniferous Pennsylavanian stigmaria identification

[ntloux]

I have 4 Pennsylvanian stigmaria specimens of which only one was specifically identified as a lepidodendron by the collector.  I am hopeful that others might have useful suggestions in terms of better identifying the others.  The 1st image is of a Pennsylvanian lepidodendron stigmaria specimen from Kentucky.  This is my nicest one because not only is it better identified, it also illustrates rootlets and buttons.

 

 

Image 2 is of another Pennsylvanian stigmaria from Clintonville, Pennsylvania.  This appears to be the most common type of stigmaria that I have seen.  Would anyone have suggestion/possibilities that would better characterize this specimen?

 

 

Images 3 and 4 are a Pennsylvanian stigmaria with a heavily degraded label.  Image 4 is a closeup of the specimen in image 3.  I was able to decipher parts of the label and it was apparently collected near Middlesboro, Kentucky.  The rootlet scars on this specimen are much less three dimensional that the rootlet scars on the specimen in image 2.  There may be a comment on the label about the rootlet scars having a spiral character.  Would anyone be better able to characterize this specimen?

 

 

 

 

Image 5 is of another Pennsylvanian stigmaria from Kentucky.  It has many similarities with the specimen depicted in image 2. 

 

 

I also have one very heavily weathered stigmaria from Oklahoma that is very similar to the ones depicted in images 2 and 5; I didn't think it was worth uploading an image.  Comments and suggestions about the others would be appreciated.

 

 

 

 

 

 

[Yoda]

@ntloux

Some really nice Stigmaria specimens 

[Tidgy's Dad]

That is lovely.