Good evening everyone!
I checked the flint vertebrate collection at home, prepared two ribs by needle and look for possible ID in the internet.
The both ribs are 7-8 mm length, curved and quite short that lets me to think they are lumbar or last thoracic (around pelvic girdle).
I know that fishes also have ribs but they are not so rounded in the cross section and much less curved I think, fish ribs are even very narrow.
I would say that the feature of flet rib edges could origin from cynodont reptiles (their ribs even have leaf like bodies).
I am also very unsure about lizard identification because their ribs are rounded in cross section and narrow in all the length.
Please suggest any ideas, all help will be appreciated!
Best Regards
Domas