Need help to identify ammonite

[relaxken]

Hi, I got this ammonite from my friend but we can't identify it. Could anyone help to tell which genus it is?

 

[Architeuthoceras]

Nice fossil! It looks like some kind of Stephanoceratid to me, but without size information and some kind of provenance that would just be a WAG. Try to find out where it came from and what geologic formation/age it was found in, a lot of ammonites look the same as others (homeomorphs) so it could be any one of thousands

 

[relaxken]

Thanks Kevin! I had a similar feeling its super family is Stephanoceratoidea. Its size is around 4cm. I don't know its origin as it's bought from a market. I am an amateur ammonite collector. I find it's so hard to tell the difference between some genus sometimes. Any books or resources to recommend ?

 

[relaxken]

I feel the most similar looking I found from google is Otoites in Otoitidae family under Stephanoceratoidea. From the items I found Internet, they have similar sizes.

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https://www.catawiki.com/en/l/21703135-a-fine-fossil-ammonite-otoites-contractus-4-0-cm-on-matrix-calcit-replacement.

 

[Architeuthoceras]

Looks like you're on the good track... Keep looking for good provenance to verify your determinations.
Happy Collecting