Nautiloid? And what species would it be? (Solved also No soft tissue)

[Samurai]

Timer period: Pennsylvanian

Location: Missouri

Formation: Not exactly sure.

Found in an abandoned rock pile containing limestone from the Iola Limestone

Still it is a possibility it came from limestone from the Upper Winterset limestone.

 

Hello! I found this nautiloid a long time ago and it was too heavy for me to carry the chunk of limestone that contained it, but before I left I got a few pictures of the specimen! Once I observed the photo a few weeks later I had the biggest regret of my life as it might contain an impression of soft tissue! 

 

I don't know If my mind is playing tricks on me but I think it might contain soft tissue. The thought is driving me crazy since I am always doubtful when I find fossils like these and due to my own lack of experience. Can anyone confirm if it does contain soft tissue?

 

 

 

 

 

Is this a tentacle? or my imagination?

 

 

 

 

Here are photos I edited in photoshop in order to see if I can make the features more visible

(Above) Added more saturation and darkened

(above) Added saturation and brightened the image

 

I would like to note I have returned to the area but I have had no luck in finding it again and these are the clearest images I could obtain and I apologize for the blurriness

 

 

Here are the images in their natural file size and some additional images:

https://imgur.com/a/80wzODc

 

If possible I would also love to know its species but I find that unlikely since it is bisected and poorly preserved shell wise.

[Top Trilo]

I don’t know what species it would be but I think the “soft tissue” is part of the shell that has eroded away and left the faint imprint. That would be my guess let’s see what others make of it

[Samurai]

20 minutes ago, Top Trilo said:

I don’t know what species it would be but I think the “soft tissue” is part of the shell that has eroded away and left the faint imprint. That would be my guess let’s see what others make of it

I thought it might be a faint imprint but I just wanted to make sure of what it could possibly be, thank you for responding.

[Fossildude19]

Looks like the cross section/extension of the shell, ... maybe the living chamber? 

[Ludwigia]

I agree with the others. Not seeing any soft tissue at any rate. Soft tissue is usually preserved, and nota bene, very rarely, in an anoxic environment in dark shales or marls. Limestone is always built where there is plenty of oxygen in the water.

[oilshale]

46 minutes ago, Ludwigia said:

I agree with the others. Not seeing any soft tissue at any rate. Soft tissue is usually preserved, and nota bene, very rarely, in an anoxic environment in dark shales or marls. Limestone is always built where there is plenty of oxygen in the water.

 

I agree with Ludwigia, normally soft tissue preservation occurs only in black shales and marl formed under anoxic conditions.  But there are rare exceptions to the rule. The lithographic limestones of Solnhofen are calcareous, but sometimes show soft tissue preservation (as imprints).

 

But here it looks like the remains of a weathered shell.

[jpc]

2 hours ago, Fossildude19 said:

Looks like the cross section/extension of the shell, ... maybe the living chamber? 

yup.