Ammonites Brachiopods Rudist

[fifbrindacier]

Hi everybody, Dimitris sent me some nice stuff and I'd like your opinion about them. 

A cretaceous ammonite, maybe protetragonites

 

An Oxfordo-callovian one

 

Rynchonellids from the Trias of the Nechinska bara river

 

That rudist from the Maastritchian of Mont Ptoon, Grèce. 

 

[abyssunder]

I'm not sure I can see rudists there. 

[fifbrindacier]

I agree it might be something else, i don't see the three "columns" that can usually be seen when seen in cross-section. But i have doubts.

[Tidgy's Dad]

Rhynchonellids are often a nightmare to id, but i think those are Jurassic Lacunosella. 

[fifbrindacier]

Thank you very much Adam.

[abyssunder]

24 minutes ago, fifbrindacier said:

I agree it might be something else, i don't see the three "columns" that can usually be seen when seen in cross-section. But i have doubts.

Pictures 7,8,9 suggest rudist. I could bet on this. 

(not pictures 3,4)

I think, I receive tooo late the updates, or I' m too slow.

[fifbrindacier]

After talking to Dimitris about the ammonites i have rectifications to bring : they all come from the Zimevitsa plateau in Bulgaria and he said he collected them at the limit between Jurassic and Triassic layers. He hesitates between the Gintsi and the Radomir formations.

To me the first one looks like an Oppelid.

file:///C:/Users/acer/Downloads/Zimevitsa_GBGA_2014.pdf

http://www.bgd.bg/CONFERENCES/Geonauki_2014/Sbornik/pdf/26_Metodiev_GeoSci_2014.pdf

https://www.bgd.bg/CONFERENCES/Geonauki_2017/Sbornik/pdf/37_Metodiev_GeoSci_2017.pdf

http://www.bgd.bg/CONFERENCES/Geonauki_2015/Sbornik/pdf/48_Metodiev_GEOSCIENCES_2015.pdf