Dear Peter,

there are heteromorphic ceratites (Triassic), heteromorphic ammonines
(mostly mid-Jurassic) and the most commonly known late Cretaceous
ancyloceratites like Turrilites, Scaphites, Baculites etc. Heteromorphic
Ammonites or Ancyloceratidae should do the job on Google

Best wishes,
Sven

> Hey all extinct Cephalopod experts,
>
> I was mentioning today to a work colleague that not all ammonites
> were planospiral, but that some were very strangely shaped indeed.
> Now I can't remember any names to Google to show him. Can someone
> please tell me some? Especially the strangely twisting ones.
>
> Thanks,
> Peter
>
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Dr. Sven Nielsen
Institut für Geowissenschaften
-Paläontologie-
Christian-Albrechts-Universität Kiel
Ludewig-Meyn-Str. 10
24118 Kiel
Germany

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