Ruixinia is an extinct genus of somphospondylan sauropod dinosaur from the Early Cretaceous (Barremian) Yixian Formation of China. The genus contains a single species, Ruixinia zhangi, known from a partial articulated skeleton. This specimen preserves the most complete series of caudal vertebrae known from any Asian titanosauriform.
Ruixinia is an extinct genus of somphospondylan sauropod dinosaur from the Early Cretaceous (Barremian) Yixian Formation of China. The genus contains a single species, Ruixinia zhangi, known from a partial articulated skeleton. This specimen preserves the most complete series of caudal vertebrae known from any Asian titanosauriform.
==Discovery and naming== The Ruixinia holotype specimen, ELDM EL-J009, was found in sediments of the Yixian Formation in Beipiao, Liaoning Province, northeastern China. This locality is dated to the Barremian age of the Early Cretaceous period. The fossil material consists of a partial articulated skeleton including cervical (neck), dorsal (back), and sacral vertebrae, caudal (tail) vertebrae and associated chevrons, dorsal ribs, and a left ilium, pubis, femur, tibia, astragalus, metatarsal V, and possible pedal phalanx. At the time of its description, the fossil material was still partially embedded in matrix, with only the left side of the bones prepared.
Discovered by embedding cosine similarity (sentence-transformers MiniLM, 384-dim).