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I urge caution to all collectors buying or trading from dealers, diggers or fellow collectors. Most collectors, diggers or dealers are honest and trustworthy but not all have a firm handle on identification and I'm seeing this situation worsening not improving. Its not easy even for paleontologists who are trained. I include collectors because like myself, have over the years, been sold misidentified material. So dont trust anything you see offered to you and get it verified. Here is just a sampling of a few items I've run across. Provenance is very important in identification ALWAYS request Formation, State or Province and very important County or Town if in the States or City/Area if Alberta. I see lots of genus/species names being assigned to Ceratopsian or Hadrosaurian bones. Other than Edmontosaurus from the Hell Creek or Lance formations its extremely difficult to assign names to any post cranial material from these families. There are just to many named or yet to be named species from Campanian deposits of formations like Aguja of Texas and the Judith River & Two Med Formations of Montana not to mention Canada. Theropod teeth especially Jurassic ones are very hard to distinguish between one another, photos are just not adequate to validate them. Serration counts and dimensions are needed to try to properly assign them. So request it from the seller. Some real life examples: Very nice Metatarsal listed as a Lambeosaurus from the Hell Creek Fm, Jordan, Montana. Species does not even exist in the HC. Its Edmontosaurus This beautiful vertebra is being listed as a caudal of a Carcharodontosaurus sp., a great collector piece. The description states that the ball and socket indicated how far the tail could swing. Unfortunately the seller is looking at the wrong end of the dinosaur. To me it looks like a cervical vertebra of a Spinosaurid. I did advise the seller a few days ago and he did say a change would be made and the listing has been corrected. Here is a photo of a Sigilmassasaurus for you skeptics This type of tooth from the Kem Kem is an indeterminate Abelisaurid not a RAPTOR, not a Dromaeosaur, not a Deltadromeus Very nice femur being listed as Pachycephalosaurus, its Thescelosaurus .. Very nice rooted tooth being listed as Torosaurus, its a Ceratopsian tooth. There is no way to distinguish Torosaurus teeth from all the other large bodied ceratopsian in the Hell Creek Fm other that if it was found with an identifiable skull. This claw was sold as Troodon from the Judith River, to me it looks like Caenagnathidae This is being listed as a first phalange Toe bone of a tyrannosaur Daspletosaurus. Its a metatarsal of an indeterminate Tyrannosaurid either Daspletosaurus or Gorgosaurus. Unless it was found with some Daspleto diagnostic material, difficult to tell them apart. Seller was advised a long time ago, no changes made. A Daspletosaurus tooth is listed from the Judith River Fm...beautiful tooth but one cannot distinguish teeth between teeth of Tyrannosaurids and Daspletosaurus sp. although assumed to be present its yet to be described from JR deposits