Abstract: Based on well—preserved impressions of articulated skeletons, a new urodele, Jeholotriton paradoxus gen. et sp. nov., is described from the lower part of the Yixian Fomation (Early Cretaceous), Nei Mongol, China. The discovery of' Jeholotriton documents the third Mesozoic salamander from China. Jeholotriton differs from other early caudates in having an anteromedially directed ramus of pterygoid that connects to the skull table rather than the maxilla. It is also characterized by having widely separated vomers, longitudinal vomerine tooth row, large nasals with no anterior notch, frontal with no anterolateral extension, short and incomplete maxillary arcade with no quadratojugal, prominent alary process of premaxilla, short maxilla, fused and dentigerous coronoid--prearticular, 17 presacrals, amphicoelous vertebrae, short transverse processes of the vertebrae, proximally expanded unicapitace ribs, and phalangeal formula of 2—2—3—2 for manus and 2—2—3 3—2 for pes.

摘要： 描述了内蒙古宁城白垩统义县组下部一新的有尾两栖类:奇异热河螈(新属、新种) Jeholotriton paradoxus gen. et sp. nov。标本保存了完好的相关节的骨架印痕，头骨中的翼骨具有一个不与上颌骨相连，而与头骨中部相连的前内侧突，这使它区别于其他早期有尾类。