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I bought these from the internet and they are from the kemkem basins. They are fossil ribs, but it didn't say what they were from. Are they too small for dinosaur ribs? The biggest one is about two and a half inches.
I would appriciate any answers on this one.
it could be from an ice age mammal
It definietly isn't off an ice age mammal. It is a fossil and ice age fossils are a subfossil.