Analysis of seventy published papers dealing with Mexican Upper Cretaceous rudists, together with consultation of the newest geological maps covering the areas with mentioned rudist fossil localities, evidenced that: a) several among the Turonian-Maastrichtian species mentioned are junior synonymies, nomen nudum, insufficiently described, or have untraceable types. According to modern standards, around sixty species seem acceptable, Antillocaprinidae (12), Hippuritidae (11), Plagioptychidae (9), and Radiolitidae (27). Only three species (Turonian) are common with Eurasia. All the Santonian-Maastrichtian rudists (54) are exclusively American species, either ascribed to Eurasian (9) or to American (21) genera. b) Research on rudists helped to improve the stratigraphy in some areas, and to point out or clear up some geological issues in others. c) The restudy of the geology in some areas, of some rudist collections in museums, and of some rudist groups, are much necessary and must be undertaken.

分析了涉及墨西哥上白垩统的七十篇已发表论文，并咨询了涵盖上述提到的白垩纪化石的地区的最新地质图，这表明：a）所提到的土伦-马斯特里赫特物种中有几种是低级同义词，即诺曼·努登姆（nomen nudum），描述不足或类型无法追踪。根据现代标准，大约有六十个物种似乎可以接受，其中cap螨科（12），H科（11），斜纹科（9）和and科（27）。欧亚大陆只有三种（突厥人）是常见的。所有的Santonian-Maastrichtian护航员（54）都是美国物种，归因于欧亚（9）或美国（21）属。b）对红土学家的研究有助于改善某些地区的地层，并指出或清除其他地区的某些地质问题。c）对某些地区的地质学，博物馆中的一些红帽收藏家以及某些红帽团体进行重新研究是非常必要的，必须进行。