 The specific name referred to their hypothesis based on these specimens that nearly all Morrison diplodocid species are either growth stages or represent sexual dimorphism among members of the genus "Amphicoelias", but this analysis has been met with skepticism and the publication itself has been disclaimed by its lead author, explaining that it is "obviously a drafted manuscript complete with typos, etc., and not a final paper.In fact, no printing or distribution has been attempted".Osborn and Mook, in 1921, provisionally synonymized "A. fragillimus" with "A. altus", while sinking "A. latus" into "Camarasaurus supremus", and suggesting also that "A. fragillimus" is just a very large individual of "A. altus", a position that most subsequent studies, including McIntosh 1998, Foster (2007), and Woodruff and Foster (2015) have agreed with.