Hyolithes (English spelling)
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A fossil genus that belongs to the order Pteropoda of the class Gastropoda of the phylum Mollusca. However, its classification is uncertain. The shell is conical or horn-conical, and the opening has a lid with a concentric pattern. It flourished from the Cambrian to the Permian. Source: Encyclopaedia Britannica Concise Encyclopedia About Encyclopaedia Britannica Concise Encyclopedia Information |
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軟体動物門腹足綱翼足目とされている化石属。しかし，分類上の位置は確かでない。殻は円錐または角円錐形，殻口は同心円状の模様のあるふたをもつ。カンブリア紀からペルム紀に栄えた。
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