ABSTRACT The Balnibarbiinae is one of eight subfamilies of the Olenidae, a diverse family of late Cambrian to Ordovician trilobites. Balnibarbiine species occur in a relatively continuous section of deeper-water sediments exposed along the northeastern coastline of Spitsbergen, Svalbard, as well as scattered deeper-water beds in central Nevada. Results of phylogenetic analyses of the subfamily using both parsimony and Bayesian methods are consistent with a previous hypothesis based on phyletic similarity and stratigraphic range. Cloacaspis Fortey, 1974, is supported as monophyletic, but the support for Balnibarbi Fortey, 1974, is weak, and the genus may be paraphyletic to Cloacaspis even with the reassignment of Balnibarbi ceryx Fortey, 1974, to Cloacaspis. New field collections and discovery of previously undescribed material in museum and survey collections provides the basis for emended descriptions of the genus Cloacaspis, as well as Cloacaspis tesselata Fortey and Droser, 1999, Cloacaspis ekphymosa Fortey, 1974, and Balnibarbi erugata Fortey, 1974, and expands the geographic range of the subfamily to Alaska.

中文翻译：

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三叶虫亚科Balnibarbiinae（Olenidae）的系统发育分析和修正

摘要 Balnibarbiinae 是 Olenidae 的八个亚科之一，Olenidae 是晚寒武纪到奥陶纪三叶虫的一个多样化科。Balnibarbiine 物种出现在斯瓦尔巴群岛斯匹次卑尔根东北海岸线暴露的深水沉积物的相对连续部分，以及内华达州中部分散的深水床。使用简约和贝叶斯方法对亚科进行系统发育分析的结果与先前基于系统相似性和地层范围的假设一致。Cloacaspis Fortey, 1974 被支持为单系，但对 Balnibarbi Fortey, 1974 的支持较弱，即使将 Balnibarbi ceryx Fortey, 1974 重新分配到 Cloacaspis，该属也可能与 Cloacaspis 并列。