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Stylonuridae : ウィキペディア英語版
Stylonuridae

Stylonuridae are an extinct family of prehistoric eurypterids within the Superfamily Stylonuroidea.
==Description==
''Stylonuridae'', which lived from the Ordovician to Lower Permian periods, were small to very large forms with scales developing into tubercules and knobs. The prosoma (head) exhibited variable shape, with arcuate compound eyes located subcentrally, or anteriorly. Their abdomens were slender. Their walking legs were long and powerful, sometimes characterized by spines. Most genera did not have swimming legs.〔 1955. Merostomata. ''Treatise on Invertebrate Paleontology, Part P Arthropoda 2, Chelicerata'', P: 36.〕

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
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