Palaeobiogeograhic relationships of Early Carboniferous ammonoid assemblages in North America

早石炭世（密西西比世）是一个主要构造板块形态发生重大变化的时期。Variscan造山运动导致了陆架的分离和随后的氨类群落的地方化。因此，Subvariscan王国（欧洲西北部和中欧）可以明显地与Prototethian王国（南欧、北非、南乌拉尔）区分开来。然而，对北美的动物省进行的调查要少得多。在拟议的项目中，将对美国中部大陆（阿肯色州、俄克拉荷马、德克萨斯州）的Ouchita前陆盆地与美国西部（加利福尼亚州、内华达州、犹他州）的鹿角前陆盆地进行组合比较。这两个地区的氨类动物群将在全球范围内进行研究。该项目的目标是定量分析菊石的生物地理格局和中石炭世适应性辐射的时间。

The Early Carboniferous (Mississippian) is a time that is characterised by significant changes in the configuration of the main tectonic plates. The Variscan Orogeny led to the separation of shelves and subsequent provincialism of ammonoid communities. Therefore, a Subvariscan Realm (Northwestern and Central Europe) of can clearly be distinguished from a Prototethian Realm (South Europe, North Africa, South Urals). Faunal provinces in North America, however, are much less well investigated. Within the proposed project, a comparison of the assemblages present in the Ouchita Foreland Basin of the American Midcontinent (Arkansas, Oklahoma, Texas) with the Antler Foreland Basin of the Western United States (California, Nevada, Utah) will be carried out. The ammonoid faunas of these two areas will be investigated in a global context. The goal of the project is the quantitative analysis of the biogeographic patterns and the timing of the mid-Carboniferous adaptive radiation of the ammonoids.