Acheroraptor tempertyorum was described in 2013 from the late Maastrichtian deposits of the Hell Creek Formation. The implication of this to collectors is significant and I'm not sure its fully appreciated. There also appears to be lots of confusion on what is being offered for sale on Ebay and by online Dealers, so I would like to offer my understanding of what is going on with these small theropod teeth, from a collectors point of view. The study that described this species concluded that