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English: Some examples of aptychi (right: oppeliid ammonite from Late Jurassic of Solnhofen, Germany; left: aptychi (recto and versus) from Late Jurassic of Lombardy, Italy), and conceptual scheme of their function.
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29 January 2009

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current22:27, 29 January 2009Thumbnail for version as of 22:27, 29 January 2009960 × 720 (616 KB)Antonov{{Information |Description={{en|1=Some examples of aptychi (right: oppeliid ammonite from Late Jurassic of Solnhofen, Germany; left: aptychi (recto and versus) from Late Jurassic of Lombardy, Italy), and conceptual scheme of their function.}} |Source=Oper

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