Arthropod predation

[Kato]

Hi, I'm cataloging some finds and would like to learn more about how to identify predation. In the dozens of specimens I have of cordaite leaves from this particular formation, only two have properties suggestive of predation of some sort. The rest are either undamaged or show signs of splitting in the leaves.

 

How do I identify predation? What are the sources of predation? Arthropods? Microconchids? I've searched on google but not found any satisfactory information.

 

Any guidance appreciated! 

 

Thanks, Kato

 

 

I can't find the other half of this split pair currently but the other half is the mirror image of this. I'm thinking this is just missing parts of the leaf due to natural decay processes before preservation.

 

 

[rocket]

might be insects. Do not know which one is doing but when I compare it with modern ones, might be

[Fossildude19]

I would lean more toward preservation issues/ how the rock split rather than trace fossil or insect predation here.

[Kato]

Thanks rocket and Tim.