Devonian (Givetian) Ammonoid ID Help

[Fischcrazy]

I collected these last weekend from the Millboro Shale (Devonian: Givetian) in Highland County, Virginia, USA. I cant seem to identify these and not familiar with Ammonoid taxobases, not sure where to start. I did go through House, M.R., 1962, Observations on the Ammonoid Succession of the North American Devonian. House does cover the Millboro Shale but only lists occurrences of Sobolewia virginiana, Tornoceras uniangulare, Maenioceras sp.

 

I dont have access to the Treatise part K so any help IDing these would be amazing!

[Fossildude19]

Possibly helpful Link to Paper.

 

@fossilcrazy  @ScottBlooded

[ScottBlooded]

What beautiful finds! I’m afraid my knowledge on this is narrow and limited, I work primarily in an early/mid Devonian formation (Needmore) in the vicinity of Winchester VA. I started finding a lot of ammonoids very similar in shape to yours here but notably lacking the defined ridges (also not nearly as well preserved as yours, very jealous). When I asked the community here, the overwhelming consensus was that they were goniatites of some sort. Unfortunately I never got too much further than that on my own, got a little sidetracked. But I would also love to know more and still find them all the time, this is one I found just the other day.

[fossilcrazy]

You can rule out Tornoceras uniangulare. I can't help with region/formation specific species, but Manticoceras looks like the right family line.