Abstract The distributional patterns of the species of the mollusc subclass Vetigastropoda were analysed using the panbiogeographical method of track analysis. We analysed distributional data of 434 species and 72 genera of the world obtained from specialized literature and records in 12 malacological collections. We constructed the individual tracks for the species analysed and superimposed them, applying a parsimony analysis of endemicity with progressive character elimination. We identified 26 generalized tracks, extending in the Pacific Ocean (14), Indian Ocean (six), Atlantic Ocean (four), Mediterranean Sea (one) and Atlantic–Pacific Oceans (one). The generalized tracks show the complex relationships of the mollusc biota, representing geographical and phylogenetic boundaries of taxa with diverse geographical affinities. Five panbiogeographical nodes were identified by the intersection of two or more generalized tracks. Our analysis offers an approximation for understanding the distributional patterns of vetigastropod species worldwide from the perspective of evolutionary or historical biogeography. The results obtained for the Vetigastropoda coincide completely or in part with those previously presented for other taxa. The generalized tracks support hypotheses of primary biogeographical homology that might be corroborated by evidence from other different, phylogenetically unrelated taxa.

中文翻译：

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Vetigastropoda（软体动物）在世界各地的分布模式：轨迹分析

摘要 采用轨迹分析的泛生物地理学方法分析了软体动物亚纲Vetigaastropoda的分布格局。我们分析了世界上 434 个物种和 72 个属的分布数据，这些数据来自 12 个动物学收藏的专业文献和记录。我们为分析的物种构建了单独的轨迹并将它们叠加起来，应用了对地方性的简约分析，并逐步消除了特征。我们确定了 26 条广义轨道，延伸至太平洋（14）、印度洋（6）、大西洋（4）、地中海（1）和大西洋-太平洋（1）。概括的轨迹显示了软体动物生物群的复杂关系，代表了具有不同地理亲和力的分类群的地理和系统发育边界。五个泛生物地理节点由两个或多个广义轨迹的交叉点确定。我们的分析为从进化或历史生物地理学的角度理解全球 vetigastropod 物种的分布模式提供了近似值。Vetigastropoda 获得的结果与之前为其他分类群提出的结果完全或部分一致。广义的轨道支持主要生物地理同源性的假设，这些假设可能被其他不同的、系统发育不相关的分类群的证据所证实。Vetigastropoda 获得的结果与之前为其他分类群提出的结果完全或部分一致。广义的轨道支持主要生物地理同源性的假设，这些假设可能被其他不同的、系统发育不相关的分类群的证据所证实。Vetigastropoda 获得的结果与之前为其他分类群提出的结果完全或部分一致。广义的轨道支持主要生物地理同源性的假设，这些假设可能被其他不同的、系统发育不相关的分类群的证据所证实。