Mazon Creek Lungfish plate?

[connorp]

Had this concretion open today. I'm pretty confident it's something vertebrate. Maybe a lungfish plate? @jdp @RCFossils Thanks for any help.

 

[Mark Kmiecik]

Reminds me a bit of the proximal end of Lepidostrobophyllum mansfieldi cf. L. majus. The size is about right. I am not at all familiar with lungfish.

[siteseer]

I see why you're thinking maybe lungfish but that looks a little irregular and a little too big for a lungfish plate of that time.  I'd be happy to be wrong and looking forward to reading what Jdp, RCFossils, and others experienced with Mazon Creek think about it.

[RCFossils]

This is another odd one.

I am definitely not seeing this being lungfish material.

Without examining it in person, my best guess is a coprolite.

I have seen them preserved before from the River site with similar preservation.

[Runner64]

1 hour ago, RCFossils said:

I have seen them preserved before from the River site with similar preservation.

I haven’t seen one before, do you happen to have an image?

[sixgill pete]

@Nimravis

[Nimravis]

This is one odd looking concretion, and if I was shown the picture and took a bet that it was a MC concretion, I definitely would have lost that bet. I have no clue on this one.

[connorp]

22 minutes ago, Nimravis said:

This is one odd looking concretion, and if I was shown the picture and took a bet that it was a MC concretion, I definitely would have lost that bet. I have no clue on this one.

Definitely doesn't look much like one now. It was one of those frustrating river ones with tons of thin layers that just keeps flaking.

[jdp]

Agreed with others. I don't think this is lungfish.

[deutscheben]

Quite an interesting one. Those bits of black carbonized material would generally lead me to think it was plant material of some sort, but beyond that I don’t know.