“亚洲首例”，北京小学生意外发现！

Core Insights - The discovery of the first Jurassic amphibian footprint fossil in Asia fills a significant gap in the study of Jurassic amphibian trace fossils in China and Asia, providing valuable evidence for understanding the paleogeography, paleoecology, and biodiversity of North China approximately 160 million years ago [1][7] Group 1: Discovery and Significance - The fossil was discovered in the Mentougou District of Beijing, which has unique geological conditions that preserve rich fossil records [3] - The initial discovery was made by a primary school student, Ni Jingchen, who found a rock slab with distinct footprints while exploring with his parents [3][5] - The findings were published in the international journal "Ichnology," highlighting the importance of public participation in scientific discovery [7] Group 2: Fossil Characteristics - The fossil consists of two footprints preserved on the same rock slab, with one clear footprint measuring 1.5 cm in length and 1.3 cm in width, indicating a small-sized animal [5][6] - The second footprint is less clear, showing signs of five toes, measuring approximately 1.1 cm in length and 1.4 cm in width [5] Group 3: Research Methodology - The research team utilized photogrammetry and 3D modeling techniques to create high-precision digital models of the fossil, allowing for detailed morphological analysis [6] - The footprints are believed to belong to the same animal, likely an early salamander-like amphibian, based on their relative size, spacing, and alignment [6] Group 4: Ecological Context - This discovery marks the first scientific description of amphibian footprints in Jurassic strata in Asia, contrasting with previous records that primarily documented dinosaur and turtle footprints [7] - The fossil layer is part of the important coal-bearing strata in the Mentougou area, indicating that small amphibians existed in a lake-swamp environment alongside diverse plant life during the Middle Jurassic period [7]