Ammonites diartianus d'Orbigny, 1850,Vascoceratidae du cénomanien supérieur de saint-calais (Sarthe)
Ammonites diartianus d'Orbigny is a Vascocerasoof late Cenomanian (Sciponoceras gracile Zone) age, occuring in both Sarthe (France) and southern England. It is the earliest vascoceratid known from France, and its recognition is of great significance, lending support to recent suggestions that t...
Main Authors: | Kennedy, W, Juignet, P |
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Format: | Journal article |
Language: | French |
Published: |
1977
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