Please help ID these fossiles

[PaleoOrdo]

I found several kinds of gastropods and two other uknown fossiles in the Kalvsjøen formation, late Ordovivcian at Hadeland in the Oslo field, which I like to share. The limestones in this formation are called 'the Gastropod limestones'. Can anyone please help ID some of these fossils. I guess some of the gastropods cannot be ID-ed, but I hope some of them can be at some level and the other unknown animals. Any help are appreciated.

The first rock (the first 3 pictures) has one strange fossile (to the left) and several small gastropods, some very small, which I could only see by taking several pictures from different angles and by using different light sources:

Enlarged left side:

Picture 3, the right side enlarged:

The next, rock no. 2, has a nice shape of the cross-section of a gastropod with 5 levels or spirals: 

It also has a strange very small fossil, near my finger.

Picture 4

Pict. 5

 Pic. 6-8, enlaged small fossile:

 

 

Rock 3, picture 9, another gastropod in cross section, size is about 2 cm broad:

Rock 4-5, picture 10-11, two very small and nice gastropods, which I did see only after I enlaged a picture I took of the rock with a microscope:

 

Edited May 17, 2022 by PaleoOrdo

[PaleoOrdo]

A few more gastropods from the same formation.

Picture 12, about 5 cm long:

Picture 13, the biggest I found of all the gastropods:

Picture 14-15, cross section of a gastropod?:

Finally, picture 16, a speciemen in a big rock I left in situ:

 

 

 

 

 

 

[Ludwigia]

I'm not at all familiar with your formation, so I'm afraid I can't help with ids. It's also quite difficult anyway, since these are all partials and cross sections without any defining ornamentation showing. I think your first strange fossil is another gastropod and the second just might be part of a trilobite. I would suggest you search for papers and articles about the fauna of this formation and make comparisons of the forms.

[PaleoOrdo]

22 hours ago, Ludwigia said:

I think your first strange fossil is another gastropod and the second just might be part of a trilobite. I would suggest you search for papers and articles about the fauna of this formation and make comparisons of the forms.

Thank you Ludigia, I will try do that. Hope you enjoyed the pictures.