Pachydiscus (Pachydiscus) Kennedy 1986 from: Kennedy, W.J.. (1986): The ammonite fauna of the Calcaire à Baculites (Upper Maastrichtian) of the Cotentin Peninsula (Manche, France) . Palaeontology Vol. 29(1) p. 25-83 . |
Notice: This catalogue page may contain unedited data.
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Species Pachydiscus (Pachydiscus) Kennedy 1986 |
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Diagnosis / Definition: |
Kennedy (1986):
Material. The original ofSeunes (1890a, pI. 3 (2), fig. 4), from Fresville; EMP unregistered.
Discussion. This slowly expanding juvenile P. (Pachydiscus) with depressed whorl section and numerous low, narrow, alternately long and short ribs differs from all other specimens from the Calcaire a Baculites. Seunes referred it to Ammonites colligatus without hesitation, comparing it to Binkhorst's (1861) pis. 7 and 8a; Binkhorst's figures show several species of pachydiscid, and the present specimen is certainly not conspecific with those mentioned by Seunes. It is left in open nomenclature at this time.
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Systematics: |
39 Ordo Ammonoidea
Subordo Ammonitina
Superfamilia Desmocerataceae
Familia Pachydiscidae
Genus Pachydiscus
Species Pachydiscus (Pachydiscus) jacquoti
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Synonym list: |
Kennedy (1986):
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References: |
Seunes,J.. (1890): Contribution a l'etude des cephalopodes du Cretace Superieur de France. 1. Ammonites du Calcaire ä Baculites du Cotentin. . Mém. Soc. geol. Fr. Paleont. 1, Mém. Vol. 2 p. 1-7
Kennedy,W.J.. (1986): The ammonite fauna of the Calcaire à Baculites (Upper Maastrichtian) of the Cotentin Peninsula (Manche, France) . Palaeontology Vol. 29(1) p. 25-83
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