Gastropod or Cephalopod?

#1
a while ago i took this piece of fossil brachiopod/bryozoan hash and soaked it in vinegar to see if it was silica replaced or not, and i found these 2mm wide thingys in the process. im not sure if theyre gastropods, cephalopods, or something else entirely. has anyone seen fossils like these before?
 

Attachments

Members online

No members online now.