NEW RAPTOR HAND! This is the partial hand of a raptor dinosaur that we collected from our super-site "Jack's bonebed" in 2024. It does not look quite right to be from the troodontid raptor that we have been collecting from this site, so we think it is from another skeleton that we have only just identified coming out of the same bed - a parrot-mimic oviraptorid (technically a Caenagnathid). We have a few tentative pieces of this skeleton so far, but it's looking really promising!
What's especially cool about this specimen is that it contains the "semi-lunate carpal" (meaning: half-moon wrist bone, outlined in red). This strange little bone was really important in the "birds are dinosaurs" debate: when the raptor bends its wrist, the twisted shape of the semi-lunate carpal means the arm folds like the wing of a bird. Super cool!
I purposely left a bit of matrix between the bones for stability. The bone is fairly crunchy and cracked so there was a little Apoxie gap filling plus the tiny cracks in the bones had to be meticulously cleaned grain by grain. All work done under a compound lens microscope between 12-50x magnification.
From US Public Lands administered by the Bureau of Land Management - Montana/Dakotas
