The putative xiphosuran Kiaeria Størmer, 1934, from the Late Silurian (Ludlow) of Ringerike, Norway, is redescribed from the holotype and only known specimen as a chasmataspidid chelicerate arthropod. Morphological features such as the presence of a fused buckler of three opisthosomal segments clearly indicate a chasmataspidid affinity, while the size of Kiaeria, along with the occurrence of a raised axial region and expanded anterior articulation, suggest a close phylogenetic relationship to the Ordovician Chasmataspis. As such, Kiaeria represents the first indication that the Chasmataspis-type chasmataspidid morphology persisted alongside the radiation of diploaspidids. This is also only the third chasmataspidid species recorded from the Silurian.

中文翻译：

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对假定的剑叶磷光素KiaeriaStørmer的蛇麻石亲和力，1934年

推定的剑磷磷素KiaeriaStørmer，1934，来自挪威Ringerike的志留纪晚期（Ludlow），是从整型描述的，并且仅是标本为蛇纹石化的节肢动物节肢动物。三个opisthosomal段的融合圆盾的存在清楚地表明一个chasmataspidid的亲和力，而大小形态特征，例如Kiaeria，具有一个发生沿凸起轴向区域和膨胀前关节运动，建议奥陶纪密切的亲缘关系Chasmataspis。这样，Kiaeria表示所述第一指示，所述Chasmataspis型双壳类动物的形态与双齿类动物的辐射一起持续存在。这也只是志留纪记录的第三种披孢类动物。