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出典:Wikipedia
出典:『Wikipedia』 (2011/03/06 20:16 UTC 版)
Ampyx (meaning around two) is a genus of Asaphid Ordovician-Silurian trilobites. They are characterized by three extended spines on the head-shield. Species include Ampyx linleyensis (Lanvirn-Caradoc series).
ampyx (trilobite)