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Phytophilaspis
Extinct genus of trilobites From Wikipedia, the free encyclopedia
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Phytophilaspis is a phosphatized[2] genus of trilobite-like arthropod with eyes, found in association with algal remains.[1] It dwelt in well-lit, shallow waters.[3]

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Description
Phytophilaspis has several features in common with trilobites, including: tripartite division of the dorsal shield; presence of prominent pygidium; large eyes, situated on the pleural area of the cephalon; facial sutures, and shape of the hypostome. However, it differs from trilobites in many ways, including a reduced thorax, thoracic pleura fused to each other and to the cephalon and pygidium, facial sutures not crossing the eyes, and weak original mineralization of the cuticle.[1] Because of these differences, Phytophilaspis was originally assigned to the Artiopodan subclass Concilliterga, in an undetermined order and family.[1] It was later considered by Bergström and Hou as a xandarellid, along with Cindarella, Xandarella and Sinoburius.[4] A position that was supported in subsequent studies.[5]
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