Is this an Orthocone Cephalopod?

[turtlefoot]

Hi all, 

 

I have been working pretty hard to learn and identify my fossils as I collect them.  I have one that I need confirmation on.  I believe that it is an Orthocone Cephalopod but if someone can either confirm this or tell me what it is if I am wrong, I would appreciate it.  This was found near Willow Springs, Missouri, USA.  If my studying is correct, it should be from the Ordovician Period and from the Jefferson City/Cotter Formations.  It measures a little over 57 mm long and at the widest point measures 22 mm across.  The attached image is horrible.  I cannot get any decent images with the lighting that I am using tonight.  If it isn't good enough, I will take better images tomorrow.

 

Thank you for your time and assistance.

Doug

[Rockwood]

I believe these features would be considered spreite, or menisci in a trace (ichno) fossil. 

[turtlefoot]

Thank You!  That is seriously cool to me.  I have never found anything like that before.  Something new for me to read up on tomorrow.  Thank you once again.