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Ptychoparia
}} ''Ptychoparia'' is a genus of ptychopariid trilobites: the genus is the type genus of the family Ptychopariidae Fossils of the various species are found in Middle Cambrian-aged marine strata of Eurasia and North America, about 513 ± 0.3 to 499 ± 1.7 million years ago. ==Distribution== Fossils have been found in Middle Cambrian marine strata of the Czech Republic, India, Mexico, Norway, South Korea, the United Kingdom, United States (Montana, New York).
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「Ptychoparia」の詳細全文を読む
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