1. In 2014 Grulke published " HETEROMORPH : The rarest fossil ammonites. 2. Studies have found that the andromorph only mates half as often as the heteromorph . 3. Grulke is credited with putting heteromorph ammonites in the public eye in recent years. 4. It is a small heteromorph ammonite with almost circular cross-section of the shell. 5. "Crioceras ramoseptum " is a heteromorph that comes from the Aptian of Dagestan. 6. The outer, mature whorl separates from the coil but hooks back quickly, referred to as a heteromorph . 7. "Uhligia ", named by Koenen, 1904, has the general form characteristic of heteromorph ancyloceratids. 8. ""'Anisoceras " "'is a heteromorph ammonite belonging to the turrilitacean family Anisoceratidae. 9. "' Anisoceratidae "'is an extinct family of heteromorph ammonites which belong to the Ancyloceratina superfamily Turrilitaceae. 10. Baculitids are a kind of heteromorph ammonite characterized by a straight adult shaft, often preceded by a small coiled juvenile portion.
