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