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Glyptoxoceras sp. from: Kennedy, W.J.. (1986): The ammonite fauna of the Calcaire Baculites (Upper Maastrichtian) of the Cotentin Peninsula (Manche, France) . Palaeontology Vol. 29(1) p. 25-83
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Species Glyptoxoceras sp.



Diagnosis / Definition:
Kennedy (1986):
Description. The specimen is a fragment only, 145 mmlong with maximum whorl height of5 mm. Whorl seetion compressed oval (Wb:Wh = 0,8) with rib index 3O~35. Ribs coarse and distant, strongly prorsiradiate on flanks, passing straight across venter but flexed forwards and convex on dorsum. Sutures not seen.
Discussion / Comments:
Kennedy (1986):
Discussion. This enigmatic, straight, coarse1y ribbed fragment is referred to Glyptoxoceras by comparison with coarse-ribbed species such as G. largesulcatum (Forbes, 1846a). It could conceivably be a Phylloptychoceras Spath, 1953, but those specimens of this genus I have studied are ornamented by broad bulges rather than the c1early differentiated ribs of the present form. Glyptoxoceras species occur in the Upper Maastrichtian ofKunraed in the Maastricht area, and the present occurrence is not unexpected.
Systematics:

39
 Ordo Ammonoidea
  Subordo Ancyloceratina
   Familia Diplomoceratidae
    Subfamilia Diplomoceratinae
     Genus Glyptoxoceras
      Species Glyptoxoceras sp.
Synonym list:
Kennedy (1986):
1986 Glyptoxoceras sp. . - Kennedy : p.50
References:

Kennedy,W.J.. (1986):
The ammonite fauna of the Calcaire Baculites (Upper Maastrichtian) of the Cotentin Peninsula (Manche, France) . Palaeontology Vol. 29(1) p. 25-83

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