It would appear that Alxasaurus also has narrower dorsal neural spines than Nanshiungosaurus brevispinus . Exactly where Nanshiungosaurus bohlini should be placed within the Segnosauria is hard to say. The presence of fused cervical ribs and low dorsal neural spines would suggest placement in the Therizinosauridae, while the presence of dorsal pleurocoels would argue against placement in the Therizinosauroidea. Thus, placement in the Therizinosauridae is slightly better supported. For now, I recommend assigning it to Segnosauria incertae sedis.
Several facts argue against such an assignment.
First, the presence of dorsal pleurocoels is distinctly more plesiomorphic than Nanshiungosaurus brevispinus , which shares the derived state with Alxasaurus and presumedly other therizinosaurids. Second, the cervical morphology is more similar to Segnosaurus and Erlikosaurus than Nanshiungosaurus brevispinus . Third, no shared derived characters have been found in both species besides more than ten cervical vertebrae and low dorsal neural spines, which are currently unknown in other therizinosaurids. No synapomorphies were suggested by Dong and Yu. Fourth, the temporal distance is rather great.