Liaoxiornis is a dubious genus of enantiornithean bird. The only named species is Liaoxiornis delicatus, described by Hou and Chen in 1999. Because the species was named for a hatchling specimen, it cannot be matched with adult specimens, and so it is impossible to determine which, if any, birds from the same rocks represent adults of this species. Luis Chiappe and colleagues therefore regarded it as a nomen vanum ("empty name") or at least a nomen dubium, and recommended that use of the name be abandoned. thumb|left|Fossil of Liaoxiornis delicatus, at Museo di Storia Naturale di Venezia, Veni
Liaoxiornis is a dubious genus of enantiornithean bird. The only named species is Liaoxiornis delicatus, described by Hou and Chen in 1999. Because the species was named for a hatchling specimen, it cannot be matched with adult specimens, and so it is impossible to determine which, if any, birds from the same rocks represent adults of this species. Luis Chiappe and colleagues therefore regarded it as a nomen vanum ("empty name") or at least a nomen dubium, and recommended that use of the name be abandoned. thumb|left|Fossil of Liaoxiornis delicatus, at Museo di Storia Naturale di Venezia, Venice thumb|left|Another fossil of Liaoxiornis delicatus, at Museo Geominero de Madrid
==History== In 1999, Hou and Chen of the Nanjing Institute of Paleontology and Geology briefly described a specimen of very small bird obtained by the museum and named it Liaoxiornis delicatus. One month later, another specimen, obtained by the National Geological Museum of China (Beijing), was named by Li and Li as Lingyuanornis parvus. Soon afterwards, it was found that both museums had obtained different slabs of exactly the same specimen; because Liaoxiornis delicatus was named slightly earlier, that name takes precedence.
Discovered by embedding cosine similarity (sentence-transformers MiniLM, 384-dim).