the National Geographic Magazine where the embryonic skeleton was nicknamed as Baby Louie in honor of Louis Psihoyos, who was the photographer for that article. In 2001 the specimen was acquired by the Indianapolis Children’s Museum, where it was publicly exhibited for about 12 years. Even though the original intention of the museum was to repatriate the specimen to China, it was not until 2013 where agreements and documentation became finalized. Nearly 20 years after its initial discovery, in December 2013 the specimen was finally repatriated to China, permanently resting at the Henan Geological Museum. Despite the return of Baby Louie to China, the whereabouts of its exact locality of excavation remained unknown. In 2015 paleotonlogists Hanyong Pu, Philip J. Currie, Junchang Lü, Eva B. Koppelhus, and Songhai Jia in company of Mr. Zhang Fengchen—who participated in the initial discovery of the specimen—, reexamined the purported type locality of excavation, corresponding to the Heimaogou of the Xixia County in outcrops assigned to the Late Cretaceous Gaogou Formation (Xixia Basin). The team found eggshell fragments that are otherwise identical to those observed on the eggs associated with Baby Louie, effectively establishing the locality of provenance. Finally in 2017, the entire specimen was formally described by Pu and colleagues, naming the new genus and type species Beibeilong sinensis. Baby Louie was assigned the specimen number HGM 41HIII1219 and designated as the holotype specimen for the taxon, represented by a partial semi-articulated embryonic oviraptorosaur skeleton on top of an associated partial nest of 6-8 Macroelongatoolithus eggs. They noted that preserved eggs are only a small section/block of what would have been the original nest. The generic name, Beibeilong, is derived from the Chinese Pinyin beibei (baby) and long (dragon), meaning "baby dragon". The specific name, sinensis, refers to its country of discovery, China (prefix Sino). With the formal naming and description of Beibeilong the team reported that remains attributed to a second embryo were found protruding from inside one of the eggs. Description Beibeilong was one of the largest oviraptorosaurs extrapolated from the large Macroelongatoolithus eggs associated with the holotype embryo, measuring as much as long. It had an estimated adult length of about , with a body mass around or . The dimensions of Beibeilong were only surpassed or approached by the closely related Gigantoraptor. Skull The skull of Beibeilong, like most caenagnathids, was edentulous (toothless) as it lacked alveoli (tooth sockets).