From the collections of the American Museum of Natural History, I give you the sacrum and fused ilia of “ Apatosaurus ” minimus AMNH 675, as correctly identified by Steve P in a comment to the previous post: As Steve P rightly pointed out, AMNH 675 was designated as Brontosaurus sp. by Osborn (1904), and made the type of Apatosaurus minimus by Mook (1917). It’s been known for some time that whatever this is,