内蒙古宁城道虎沟地区首次发现中侏罗世蝌蚪化石

中国中生代的两栖类化石十分稀少,已报道的有尾两栖类仅见产于河北丰宁县凤山炮樟沟晚侏罗世的东方塘螈(Laccotriton subsolanus)、凤山中华螈(Sinerpeton fengshanensis)、辽宁葫芦岛市水口子早白垩世的钟健辽西螈(Liaoxitriton zhongjiani)、内蒙古宁城道虎沟地区中侏罗世的天义初螈(Chunerpeton tianyiensis)和奇异热河螈(Jeholotriton paradoxus),以及辽西早白垩世热河生物群中的无尾两栖类葛氏辽蟾(Liaobatrachus grabaui)、三燕丽蟾(Callobatrachus sanyanensis)北票中蟾(Mesophryne beipiaoensis)。本文记述了一件采自内蒙古宁城道虎沟地区中侏罗世的蝌蚪化石,这在中国乃至亚洲尚属首次报道,不仅填补了中国中侏罗世无尾两栖类化石分布的空白,而且进一步丰富了燕辽生物群的内容,对早期蛙类的地理分布、形态发生、生存环境等研究具有重要的科学价值。

Discovery of a Middle Jurassic Fossil Tadpole from Daohugou Region, Ningcheng, Inner Mongolia, China

Mesozoic fossil amphibians are very rare in China, to name a few, Late Jurassic Laccotriton subsolanus, and Sinerpeton fengshanensis from the Fengshan area, Fengning County, Hebei Province, Early Cretaceous Liaoxitriton zhongjiani from Shuikouzi, Huludao, Liaoning Province, Middle Jurassic Chunerpeton tianyiensis and Jeholotriton paradoxus (Caudata) from the Daohugou area, Ningcheng, Inner Mongolia, and Early Cretaceous Liaobatrachus grahaui, Callobatrachus sanyanensis (Salientia) and Mesophryne beipiaoensis from the Jehol Biota in western Liaoning. This paper reports for the first time a fossil tadpole (Salientia) from the Middle Jurassic in the Daohugou area, Ningcheng, Inner Mongolia. It not only fills in the gap of the distribution of the Anura Amphibians in the Middle Jurassic in China, but also enriches the content of the Yanliao Biota. Therefore, it is of great value for studying the geographic distribution, the morphogeny and the living conditions of early frogs.