The fossil lower beaks of Uluciala rotundata

This file set includes the 3D models and image datasets of Uluciala rotundata lower beaks used in the publication "The oldest sepioid cephalopod from the Cretaceous discovered by Digital fossil-mining with zero-shot learning AI".The 3D models were reconstructed in Amira 3D v2023.2. (Thermo Fisher Scientific, Inc.) based on label data generated from the cross-sectional images of Cretaceous carbonate concretions, which were obtained by a grinding tomography system (Ezaki et al. 2023; Iba et al. 2025; Ikegami et al. 2025: Paleobiology Lab, Department of Earth and Planetary Sciences, Hokkaido University). The cross-sectional images were cropped and then labelled by using Decoupled video segmentation approach (DEVA: Cheng et al. 2023).Institutional abbreviationsNMNS: National Museum of Nature and Science, Tokyo.ReferencesCheng, H. K., Oh, S. W., Price, B., Schwing, A. & Lee, J.-Y. Tracking anything with decoupled video segmentation. in Proc. IEEE/CVF Int. Conf. Comput. Vis. 1316–1326 (IEEE, 2023).Ezaki, Y. et al. Three-dimensional reconstruction of the in situ mode of life of the Cambrian coral Cambroctoconus: asexual reproduction and colony growth in immediate response to cryptic habitats. Pap. Palaeontol. 9, e1497 (2023).Iba, Y. et al. Nature visible only digitally. Patterns 6, 101210 (2025).Ikegami, S., Takeda, Y., Mutterlose, J., & Iba, Y. Origin and radiation of squids revealed by digital fossil-mining. Science 388, 1406–1409 (2025).本数据集套件包含发表于论文《基于零样本学习AI的数字化石发掘发现的白垩纪最古老乌贼形头足类》中所用的圆突乌鲁契亚（Uluciala rotundata）下喙的三维模型与图像数据集。 本数据集的三维模型基于白垩纪碳酸盐结核的横断面图像生成的标注数据，由赛默飞世尔科技公司的Amira 3D v2023.2重建。上述横断面图像由北海道大学地球与行星科学系古生物学实验室的研磨断层扫描系统获取（Ezaki等，2023；Iba等，2025；Ikegami等，2025）。 横断面图像先经过裁剪，再采用解耦视频分割方法（DEVA，Cheng等，2023）进行标注。 机构缩写：NMNS：东京国立自然科学博物馆（National Museum of Nature and Science, Tokyo） 参考文献： 1. Cheng, H. K., Oh, S. W., Price, B., Schwing, A. & Lee, J.-Y. 基于解耦视频分割的任意目标跟踪. 载于《IEEE/CVF国际计算机视觉大会论文集》, 1316–1326 (IEEE, 2023). 2. Ezaki, Y. 等. 寒武纪珊瑚Cambroctoconus原位生活模式的三维重建：对隐蔽生境的即时响应下的无性繁殖与群落生长. 《古生物学论文》9, e1497 (2023). 3. Iba, Y. 等. 仅可通过数字方式观测的自然. 《Patterns》6, 101210 (2025). 4. Ikegami, S., Takeda, Y., Mutterlose, J., & Iba, Y. 数字化石发掘揭示的鱿鱼起源与辐射演化. 《Science》388, 1406–1409 (2025).