On some type ammonites from the Gulf Coast Cretaceous

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  • 米国湾岸地域白堅系アンモナイトのタイプ標本
  • 米国湾岸地域白堊系アンモナイトのタイプ標本
  • ベイコク ワンガン チイキ ハクアケイ アンモナイト ノ タイプ ヒョウホン

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Notes are given, with necessary revision, on the selected sixteen species of the Gulf Coast Cretaceous ammonites on the basis of my study of their type-specimens. The specific names〔with revied ones in square bracket〕are indicated at the heading of the notes (1)-(16). The interregional significance of the Gulf Coast ammonites is discussed in conclusion.

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