Paleontologists who examined the fossil became suspicious after they noticed that the bones connecting the tail to the body were missing and that the rock slab showed signs of being reworked.
Fossiili uurinud paleontoloogidel tekkisid kahtlused siis, kui nad märkasid, et fossiilil puuduvad luud, mis peaksid saba kehaga ühendama, ning et kaljutahvlil on näha ümbertöötlemise jälgi.