research paper published in Nature Communications. In order to investigate the preserved plumage of the specimen, Xu and colleagues made use of laser-stimulated fluorescence using a 405 nm laser. The genus name combines the name of a company that sponsored the research of this taxon, Jianianhua (), and the suffix long (), meaning "dragon". The specific name, tengi, honours Ms. Teng Fangfang who acquired the specimen and made it available for study. Description The type specimen of Jianianhualong measures approximately as preserved; since the back of the tail is missing, the animal would probably have been around long in life. Scaling from a femoral length of , Xu et al. found that it weighed . Despite its small size, the specimen was mature, as indicated by the fusion of the sutures in the vertebrae. Skull The skull of Jianianhualong is small and sub-triangular, with a short snout and a wide skull roof like Mei.The frontmost-preserved bone of the snout is the maxilla, the main body of which is taller than long. This contrasts Jianianhualong from all other members of the Troodontidae, along with the top margin of the bone forming a large angle of 45° with the bottom margin. The rear branch of the bone is also deep, like derived troodontids but unlike Sinovenator. Behind the maxilla, the indentation known as the antorbital fossa bears two large openings (the antorbital fenestra and the elongated, enlarged maxillary fenestra) that stretch from the top margin to the bottom margin of the fossa; Sinovenator, Sinornithoides, and Sinusonasus have one additional opening known as the promaxillary opening. The bar of bone separating the fenestrae is narrow, like in Sinovenator. The lacrimal bone, encircling the fossa from above and behind, has a long forward-projecting branch much like other troodontids. However, the descending branch of the bone is also nearly the same length, and the descending branch also bears a unique ridge on its front portion. The nasal bone is short and broad like Mei. The inner surface of the frontal suggests details about the braincase, including the widened olfactory tract and back of the cerebrum. Compared to Sinovenator, the forward branch of the postorbital bone is not as long. Overall, the lower jaw is subtriangular when viewed from the side, with a straight top margin and a curved bottom margin; it is not downturned, unlike Sinovenator. The dentary bone is long (occupying half of the