Integration of Siluro-Devonian nautiloid biogeography and the paleogeography of Gondwana, Laurentia and peri- Gondwanide terranes

关于劳伦特超大陆位置的认识 关于冈瓦纳和冈瓦纳周边的岩石，如 阿莫里察，伊比利亚和阿瓦隆尼亚，是至关重要的， 正确理解和量化地球动力学事件 在古生代。 不幸的是古地磁数据库 志留纪-泥盆纪的大陆曾经是冈瓦纳的一部分， 不完整，对古地理的限制很少 模型 其结果是出现了几个 有争议的古地理模型， 这一时期的诠释。 一种约束或 测试这种重建是通过与井进行比较来进行的。 解释和强大的地理模式。 一个主要团体 海洋无脊椎动物，鹦鹉螺头足类动物， 特别适合这项任务。 的很大一部分 鹦鹉螺的演化发生在志留纪-泥盆纪， 地理数据库很大， 合理的努力，分析技术可用于 提供卓越品质的模式， 鹦鹉螺类头足类动物的分布现在已知已经 特别是通过障碍物来控制 用正确的方法很容易识别的大小。

Knowledge of the posotion of the supercontinent of Laurentia with respect to Gondwana and peri-Gondwanide terranes, such as Armorica, Iberia and Avalonia, is of paramount importance for the proper understanding and quantification of geodynamic events during the Paleozoic. Unfortunately, the paleomagnetic database for the Silurian-Devonian of continents once part of Gondwana is incomplete and provides few constraints on paleogeographic models. The result has been the appearance of several controversial paleogeographic models with very different interpretations for this period. One means of constraining or testing such reconstructions is through comparison with well interpreted and robust biogeographic patterns. One major group of marine invertebrates, the nautiloid cephalopods, is particularly well suited to this task. A significant portion of nautiloid evolution occurred during the Silurian-Devonian, the biogeographic database is large and can be made much better with reasonable effort, analytical techniques are available to provide patterns of exceptional quality, and the spatial distributions of nautiloid cephalopods are now known to have been particularly well controlled by barriers to dispersal of the magnitude easily recognized with proper methods.