Abstract: A new diapsid reptile is named and described on the basis of a well—preserved skeleton from the Late Jurassic / Early Cretaceous Yixian Formation, Liaoning Province, northeastern China. The specimen represents an unusually long—necked diapsid, which shows specialized adaptations to an aquatic life style in a lacustrine environment. Morphological characters, such as the small skull with a pointed snout, needle—like teeth, and a long neck, strongly indicate a piscivorous diet of the animal. This discovery documents the. first known long—necked reptile from the Mesozoic lake deposits of northeastern China.

摘要： 初步记述了采自辽西凌源地区晚侏罗世~早白垩世义县组一新的双弓类水生爬行动物化石材料，并确立其为一新属新种—凌源潜龙(Hyphalosaurus lingyuanensis gen. et sp. nov.)。化石产于凌源大王杖子乡范杖子村义县组含火山灰的灰白色湖相页岩中，与狼鳍鱼(Lycoptera)共生。 凌源潜龙的正模是一具几乎完整、保存完好的化石骨架，包括近乎完整的头骨、下颌骨和头后骨骼，仅尾椎有少量丢失，标本上主要显露腹面骨骼(中国科学院古脊椎动物与古人类研究所标本编号V11705)。其与