Abstract: Some Tinosaurus fossils were collected from the Quaternary caves of Luonan County，Shaanxi Province, which are well-preserved row of teeth and dentary. The dentary is stronger and has the vertical grooves between teeth on external side of ramus caused by wear of opposing upper teeth. The teeth are reducing in size from back to front. It is the first report of Tinosaurus in the Quintenary and made the record of this genus extended from early Tertiary to the Quaternary The specimens from the area show the characters of Tinosaurus well, and compared with other species of the genera they show some differences. So we record it as a new species: T. luonanensis sp. nov.

摘要： 在陕西洛南张坪洞穴的第四系中采得一些响蜥类(Tinosaurus)化石，有保存相当完好的上下齿骨和齿列，这是响蜥在第四纪的首次报道，使该属化石的地史分布从早第三纪延伸到第四纪。新材料下颌骨较粗壮，但个体很小，有齿间沟，同时兼具亚洲种及北美种的某些特征，因此建立一新种Tinosaurus luonanensis sp. nov.。