Check the listing for details. SUPERB 7.5” Cretaceous Mortoniceras Sp.Texas Fossil Ammonite!CRAZY Oyster Party!. Condition: New. Listed at 79.00 USD. I found it September 1, 2025. It’s the nicely preserved example of this species with beautiful sutures and virtually all of the interior spikes/nodes preserved (I didn’t even break a single one off, amazingly).