Help with Ammonite ID

[Sagebrush Steve]

I am hoping someone can help ID this ammonite I bought at a recent gem fair in Santa Rosa.  The seller said it was a pyritized ammonite from France but didn't know anything more about it.  (He had bought it from a seller from Romania and language was a barrier.)  My best guess it is it is a microconch specimen from the Harpoceras genus but the growth lines aren't as sharply sickle shaped as the textbook examples I have seen.  (Would you call these ribs "falcate" or "falcoid"?  They look somewhere in between to me.)  Also note the repeating squiggly lines running along the sides.  Are these suture lines or are they artifacts of the pyritization (?) process?  Thanks for your help!

 

[ynot]

Welcome to  !

 

I can not help with the identity but those are suture lines.

Nice pictures!!

Others will be along to help.

 

Tony

[abyssunder]

Maybe a hildoceratid Pseudogrammoceras, possibly Pseudogrammoceras fallaciosum ? http://www.ammonites.fr/Fiches/0225.htm

                                                      http://viewsofthemahantango.blogspot.ro/2015/04/pseudogrammoceras-fallaciosum-ammonite.html

 

[Sagebrush Steve]

Yes, I think you've got it.  That was another possibility I had considered but hadn't found a good example photo.  Your photo does a great job of showing the suture lines, and they look nearly identical to the ones in my specimen.  Thanks for the help!