In 2005, Kenneth Carpenter et al. described a new small theropod, Tanycolagreus, whose skeleton was found in Bone Cabin Quarry only a few hundred yards from AMNH 587.
Kenneth Carpenter et al su 2005. godine opisali jednog novog malenog teropoda, Tanycolagreusa, čiji skelet je pronađen u kamenolomu Bone Cabin samo nekoliko stotina jardi od AMNH 587.