This study reports newly discovered marine reptile fossils in Longshetiao area, Ceheng County, northwestern margin of the Nanpanjiang Basin.The fossil fragments are exposed as scattered pieces within the clastic limestone belonging to the upper part of the Loulou Formation, Early Triassic, which demonstrating typical heterochthonous burial. Conclusions: The Neogondolella jubata and Chiosella timorensis were collected from argillaceous limestone overlying the fossil- bearing strata, indicates these fossils belong to the Spathian substage of the Olenician stage, contemporaneous with those marine reptile fossils found at Zhebao and Wangmo area. Based on the fossil burial patterns and the geological evidence that the clastic limestone and slip- deformation were widespread in the upper part of the Loulou Formation around the Laizishan anticline, this study proposes that the transportation and burial of Early Triassic marine reptile in the northwestern margin of the Nanpanjiang Basin may be closely related to storm events triggered by earthquakes. This finding holds significant implications for deeper understanding the marine ecological recovery, deciphering fossil burial mechanisms and reconstructing paleogeographic contexts during the late Early Triassic.