汝阳盆地是豫西地区的一个中—新生代断陷盆地,自2006年以来发现了一个以巨型蜥脚类恐龙为代表的恐龙动物群.本文描述了近期发现于汝阳盆地下白垩统郝岭组中的若干恐龙蛋蛋壳碎片.基于以下对蛋壳宏观形态和显微特征的分析,这些蛋壳碎片可以归入长形蛋科(Elongatoolithidae)的长形蛋属(Elongatoolithus):蛋壳外表面具分散瘤点状或线性脊状的纹饰;蛋壳自内而外分为锥体层和柱状层,二层之间的界线不清晰;锥体层中锥体排列紧密;柱状层中具波浪状的平行生长纹.这一发现代表了长形蛋属在早白垩世地层中的首次记录,进一步拓展了该蛋属的地史和古地理分布.由以往已知的化石关联推测,这些蛋壳可能与该层位中的窃蛋龙类如刘店洛阳龙(Luoyanggia liudianensis)等具有相关性,表明汝阳盆地在早白垩世晚期具有适宜该类恐龙生存与繁殖的环境.

为了加强自然资源档案管理,提高社会化服务工作能力,河南省自然资源厅档案主管部门,组织开展了档案管理工作情况调查.调查发现:档案安全保存基础设施不完善,档案管理工作经费逐年减少,档案信息化建设欠帐多,社会化利用程度低,档案管理服务经济社会发展的职能职责有待加强.思考建议:切实履行档案管理法定职能职责,把握建设新型自然资源档案信息智库为保护权益、管理决策、社会化咨询服务的正确导向,加快档案基础设施和信息智库成果建设,提高自然资源档案成果信息化利用程度和信息智库人员素质,促进自然资源事业可持续发展,努力为国家经济社会发展做出更大的贡献.

数字档案馆(室)建设是档案信息化工作的重要组成部分.河南省自然资源厅应以高质量发展为背景,以新《中华人民共和国档案法》和《"十四五"全国档案事业发展规划》为依据,在建设数字档案室中坚持高站位,即在政治站位层面须坚持党的领导、战略定位层面应融入国家战略、目标定位层面须坚持人民立场,创建高水平,包括高水平的平台建设、高水平的管理能力、高水平的服务能力,立在新格局,即推动建立档案数字治理新模式.

地质资料档案是在地质调查、矿产勘察和科研工作过程中直接形成的对国家和社会具有保存价值的各种文字、图片、声音、表格、标本等不同形式的历史记录.地质资料档案信息化建设,是指运用各种现代化信息管理的方法、技术与手段来加强对地质资料档案的管理(包括收、管、存、用)的通称.本文仅就新时代地质资料档案信息化建设存在的问题与对策进行深入探讨.

Tooth replacement rate is an important feature related to feeding mechanics and food choices for dinosaurs. However, only a few data points are available for sauropod dinosaurs, partially due to rarity of relevant fossil material. Four somphospondylan sauropod species have been recovered from the Lower Cretaceous Aptian–Albian Haoling Formation in the Ruyang Basin, Henan Province of central China, but no cranial material has been reported except for a single crown. Here we report the discovery of the rostral portion of a left dentary with replacement teeth in its first five alveoli. Comparative anatomical study shows the partial dentary can be assigned to a member of early diverging somphospondylans. The non-destructive tooth length-based approach to estimating tooth formation time and replacement rate is adopted here. The estimated tooth replacement rate is 76 days, faster than that of Brachiosaurus (83 days) and much lower than typical late diverging lithostrotian titanosaurians (20 days). Thus, this discovery adds an intermediate tooth replacement rate in the evolution of titanosauriform sauropods and supports the idea that evolution of tooth replacement rate is clade-specific. This discovery also provides more information to understand the Ruyang sauropod assemblage, which includes one of the most giant dinosaurs to have walked our Earth (Ruyangosaurus giganteus).

栾川地区脊椎动物化石赋存在上白垩统秋扒组的中下部,时代可能为坎潘期晚期,以小型兽脚类恐龙骨骼为主.化石点大多分布在潭头盆地北部边缘2 km的范围,搬运距离不远.栾川动物群的化石组合包括至少8种恐龙(其中已命名6种)、2种蜥蜴类、2种哺乳类及数量众多的恐龙蛋等,代表一典型晚白垩世动物群,称为栾川动物群.栾川动物群与中国南方的赣州盆地和蒙古Nemegt盆地晚白垩世恐龙动物群具有很高的相似性,均以兽脚类恐龙为主,兼有其他脊椎动物组合.栾川动物群的研究对了解东亚晚白垩世恐龙动物群的生态面貌、恐龙多样性演化,以及环境变化对恐龙迁徙和灭绝的影响等具有重要意义.

Most birds sit on their eggs during incubation, a behaviour that likely evolved among non-avian dinosaurs. Several 'brooding' specimens of smaller species of oviraptorosaurs and troodontids reveal these non-avian theropods sat on their eggs, although little is known of incubation behaviour in larger theropod species. Here we examine egg clutches over a large body size range of oviraptorosaurs in order to understand the potential effect of body size on incubation behaviour. Eggshell porosity indicates that the eggs of all oviraptorosaurs were exposed in the nest, similar to brooding birds. Although all oviraptorosaur clutches consist of radially arranged eggs in a ring configuration, clutch morphology varies in that the central opening is small or absent in the smallest species, becomes significantly larger in larger species, and occupies most of the nest area in giant species. Our results suggest that the smallest oviraptorosaurs probably sat directly on the eggs, whereas with increasing body size more weight was likely carried by the central opening, reducing or eliminating the load on the eggs and still potentially allowing for some contact during incubation in giant species. This adaptation, not seen in birds, appears to remove the body size constraints of incubation behaviour in giant oviraptorosaurs.