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spores on leave?


blackmoth

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a friend of mine found this in a Pennsylvanian shale near baijing. The leave, of which the width is about 1cm(which could serve as a scale)  is not well preserved and possibly of cordaites, which is very common there.  We've never seen the grains like this before, of which a wild guess is some aqua-plant's spores. They are not pits as may be taken looking at the second pic.

any ideas?

 

 

5aa9e95e1e17228c58d20c0dfd646bc.thumb.jpg.466e8958bd7fe6d7e5332390f9ad021f.jpg4e49ed1cbe3cef3b6074a6c11deff67.thumb.jpg.ffe64533bc9713604bbde27ed3b7b926.jpg

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This might be some form of oviposition, which would be quite egg-citing! I know the phenomenon has been reported for cordaites before. Wil look up the literature reference tonight for proper comparisons.

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Searching for green in the dark grey.

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26 minutes ago, paleoflor said:

This might be some form of oviposition, which would be quite egg-citing! I know the phenomenon has been reported for cordaites before. Wil look up the literature reference tonight for proper comparisons.

That's what I thought as well

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7 hours ago, Rockwood said:

The critter might have had (made) a lot of gall ?

Might be... I'm still learning about all the possible traces of insect-plant interactions. Nevertheless, the images shown here closely resemble some of the structures described in Laass and Hauschke (2019). Coincidentally, I recently mentioned this paper in another thread. The paper describes oviposition on Cordaites from the Carboniferous of Germany.

 

 

Direct link to paper: https://www.sciencedirect.com/science/article/abs/pii/S003101821930241X

Some links to the images:

https://images.app.goo.gl/rguWrCSM9ymVZR4eA

https://images.app.goo.gl/vUMzyrSziRDBw67V8

https://images.app.goo.gl/sfu5CA2gayLAauoRA

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Searching for green in the dark grey.

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  • 2 weeks later...
On 2020/2/20 at 2:53 PM, paleoflor said:

This might be some form of oviposition, which would be quite egg-citing! I know the phenomenon has been reported for cordaites before. Wil look up the literature reference tonight for proper comparisons.

In the North American Coal measures, remains of stems and leaves of large size, like those of the Cordaites, are often dotted with small, convex, round or oval protuberences, which, breaking through the tissue and deranging its regular conformation, seem to represent small Fungi like species of Spheria.--- BY LEO LESQUEREUX in his SECOND GEOLOGICAL SURVEY OF PENNSYLVANIA - REPORT OF PROGRESS
P. DESCRIPTION OF THE COAL FLORA OF PENNSYLVANIA
AND OF THE
CARBONIFEROUS FORMATION THROUGHOUT THE UNITED STATES  in 1879

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