https://www.encyclopedia.com/plants-and-animals/zoology-and-veterinary-medicine/zoology-general/ammonoidea
*Ammonoidea (*ammonoids*; phylum Mollusca [1], class Cephalopoda [2])* Subclass of cephalopods which generally have planispirally [3] coiled, septate shells...
ammonoideaencyclopediacom