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lance formation teeth


gturner333

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I found these two going through some Lance formation (late cretaceous) matrix from Wyoming. The first (2 views) is a mammal tooth 1.9mm long and I am just showing it because I am proud of it. The 2nd, 4 views, looks like a mammal molar on one side (the side with the wavy lines similar to a rodent molar), but not necessarily on the other sides. I arbitrarily named two sides top and bottom but they may not be that. Any idea what the 2nd fossil is?

The hash marks are 1mm. Thanks.

mammal tooth 4 1900um top.jpg

mammal tooth 4 1900um side 1.jpg

mammal tooth 5 atop.jpg

mammal tooth 5 bot.jpg

mammal tooth 5 side 2.jpg

mammal tooth 5 side 1.jpg

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the second one looks like a partial molar of a multituberculate called Meniscoessus.  it is the biggest Lancian multi and has crescent shaped cusps.  The first one is definitely a partial upper molar of either a eutherian or a marsupial.    I think that is what I am seeing.  (No rodents back then.)  Good finds.

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