biostudies-literatureShi XNational Natural Sciences Foundation of China1624https://www.ebi.ac.uk/biostudies/studies/S-EPMC9687590biostudies-literatureUnknown11(11)The extant <i>Keteleeria</i> is endemic to east and southeast Asia, while <i>Keteleeria</i>-like trees were widely distributed in the northern hemisphere in Earth's history. In this paper, we reported a novel wood fossil of <i>Keteleerioxylon changchunense</i> Shi, Sun, Meng et Yu sp. nov., collected from the middle part of the Yingcheng Formation, Yingcheng Coal Mine, Changchun City, Jilin Province, northeast China. The quantitative growth-ring analyses of <i>K. changchunense</i> indicate that it was evergreen with a leaf longevity of 1-3 years, which is consistent with the foliar retention of extant <i>Keteleeria</i>. Its high ring-markedness index (RMI) indicates that the climate seasonality was pronounced during the Early Albian period in the Songliao Basin, northeast China. The fossilBiologyEarly Cretaceous <i>Keteleerioxylon</i> Wood in the Songliao Basin, Northeast China, and Its Geographic and Environmental Implications.PMC9687590317001839205520141972012Meng FYu JSun YShi XLan ZfalseEarly Cretaceous <i>Keteleerioxylon</i> Wood in the Songliao Basin, Northeast China, and Its Geographic and Environmental Implications.The extant <i>Keteleeria</i> is endemic to east and southeast Asia, while <i>Keteleeria</i>-like trees were widely distributed in the northern hemisphere in Earth's history. In this paper, we reported a novel wood fossil of <i>Keteleerioxylon changchunense</i> Shi, Sun, Meng et Yu sp. nov., collected from the middle part of the Yingcheng Formation, Yingcheng Coal Mine, Changchun City, Jilin Province, northeast China. The quantitative growth-ring analyses of <i>K. changchunense</i> indicate that it was evergreen with a leaf longevity of 1-3 years, which is consistent with the foliar retention of extant <i>Keteleeria</i>. Its high ring-markedness index (RMI) indicates that the climate seasonality was pronounced during the Early Albian period in the Songliao Basin, northeast China. The fossil2022-01-01T00:00:00Z2022 Nov2025-04-05T10:57:38.541Z2025-04-05T10:57:38.541ZS-EPMC96875903635832510.3390/biology11111624