the family Segnosauridae to contain this enigmatic taxon and tentatively considered this group to represent theropods. He noted that this new family was different from Therizinosauridae based on claw and antebrachium traits. Moreover, in the same year Perle and Rinchen Barsbold analyzed the pelvis structure of Segnosaurus and concluded that it was unusually different from those of "traditional" theropods. Based on these observations, they proposed that segnosaurids should be separated into a separate grouping, near the level of the main division infraorder Saurischia. Parallel to this, the newly and also described Nanshiungosaurus was assigned to the Titanosaurinae by Dong Zhiming based on the assumption it was a sauropod genus. In the following year, both Barsbold and Perle named the new theropod infraorder Segnosauria, containing the Segnosauridae. In this new paper they also described the new Erlikosaurus and Enigmosaurus (then unnamed) noting that segnosaurs were more similar to theropod dinosaurs and though some of their features resembled those of ornithischians and sauropods, these similarities were superficial and distinct when examined in detail. In 1982, Perle described a third specimen of the therizinosaurids Therizinosaurus. He referred this material to the genus based on the striking similarities with the specimens of Segnosaurus. Additionally, Perle acompared the forelimbs in these two taxa and concluded that they were characterized by elongated arms, possibly belonging to a single taxonomic group. However, based on osteological features, in 1984 Gregory S. Paul proposed that segnosaurs were no theropods but Late Cretaceous prosauropods and they represented a transitional form between prosauropods and ornithischians. For instance, segnosaurs resembled prosauropods in their skull and foot morphology and were also similar to ornithischians in their snout, pubis, and ankle. In 1988 he suggested a segnosaurian classification for the therizinosaurids Therizinosaurus. In a review article on the book The Dinosauria in 1990, Barsbold and Teresa Maryańska considered Segnosauria to be an enigmatic group of saurischians with a position subject to change. They however, disagreed with Therizinosaurus as a segnosaurian taxon since it was known from forelimb material; they corroborated the referred hindlimb material as segnosaurian though. Lastly, Barsbold and Maryańska noted the striking similarities between the pelvises of Nanshiungosaurus and Segnosaurus, such as the opisthopubic condition and large iliac blade. They concluded that the former was part of the Segnosauridae. With the description of the therizinosauroids Alxasaurus in 1993 by Dale A. Russell and Dong Zhiming, the affinities of the group were fairly