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Lechriaspis
''Lechriaspis'' is an extinct genus of poraspid heterostracan agnathan known from the Early Devonian of northern Utah, western United States. ==Discovery== ''Lechriaspis'' is known only from the holotype specimen. It was collected from the Grassy Flat Member of the Water Canyon Formation of northern Utah, which dates to the Emsian stage of the late Early Devonian. The specimen shows evidence of puncture wounds indicating predation by a eurypterid. ''Lechriaspis'' and ''Poraspis thomasi'' represent the first true members of the Cyathaspida to be described from the Devonian of the western United States.〔
抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)』 ■ウィキペディアで「Lechriaspis」の詳細全文を読む
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