Nautiloid (large) possibly Arturia

Quite a large Arturia. I'm thinking of cutting it down the middle and polishing both sides to show off those beautiful chambers. This is the largest Arturia I have found so far and one of the more complete ones.

From wikipedia:

Nautiloids are a large and diverse group of marine cephalopods (Mollusca) belonging to the subclass Nautiloidea that began in the Late Cambrian and are represented today by the living Nautilus and Allonautilus. Nautiloids flourished during the early Paleozoic era, where they constituted the main predatory animals, and developed an extraordinary diversity of shell shapes and forms. Some 2,500 species of fossil nautiloids are known, but only a handful of species survive to the present day.

 

Watch the video of it being found

Age: Miocene