摘要
In this paper, the authors analyze global brachiopod occurrences, based on the revision of published information, for the early and late Rhuddanian, the basal stage of the Silurian immediately following the end Ordovician mass extinction.The dataset consists of 137 occurrences,72 genera,and 13 localities in the early Rhuddanian (survival interval), and 272 occurrences,91 genera,and 26 localities in the late Rhuddanian (early recovery interval).The data are analyzed using Cluster Analysis,Nonmetric Multidimensional Scaling and Minimum Spanning Tree methods using the Yule’s Y coefficient and the RC coefficient (probabilistic index of similarity). The results display palaeolatitudinal distribution patterns for brachiopod survival and recovery.