摘要
描述了内蒙古宁城下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。
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 Formation (Early Cretaceous), Net 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 unicapitate ribs, and phalangeal formula of 2-2-3-2 for manus and 2-2-3-3-2 for pes.
出处
《古脊椎动物学报》
CSCD
北大核心
2000年第2期100-103,161-164,共4页
Vertebrata Palasiatica
基金
中国科学院资源与生态环境研究"九五"重大项目!KZ951-B1-410
中国科学院创新工程重大项目!KZCX3-J-03
国家
