Gastropod ID

[minnbuckeye]

This gastropod was found in a block of matrix from Graf, Iowa that I split open last week. I have never bumped into this type of gastropod from there before. Research has left me stumped. Suggestions are welcomed! Elgin member, Lower Maquoketa formation, Ordovician. 

 

Thanks for the help

 

Mike

 

[Tidgy's Dad]

Very nice, but no idea I'm afraid. 

[Bronzviking]

Can we get a closer look with less of the matrix and a top view?

[minnbuckeye]

@Bronzviking, hopefully these pics will help. 

 

 

 

 

[minnbuckeye]

I am guessing a type of Trochonema or Cyclonema

[Bronzviking]

Thanks for the good pics! The Cyclonema has more spirals or ridges around the whorls than your specimen. The Trochonema seems like a closer match, but without the apex it is hard to confirm for sure. Here is other posts for comparison and info.

Hope this helps.