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Species Helvetoglobotruncana praehelvetica Trujillo 1960



Discussion / Comments:
Caron (1985):
The species shows the same plano-convex profile but differs from H. helvetica in the absence of a true keel in the last whorl.
Systematics:

5
 Classis Foraminifera
  Familia Globotruncanidae
   Genus Helvetoglobotruncana
    Species Helvetoglobotruncana praehelvetica
Synonym list:
Caron (1985):
1960 Rugoglobigerina praehelvetica Trujillo. - Trujillo : p.340 pl 49 fig 6
1985 Helvetoglobotruncana praehelvetica Trujillo. - Caron : 68, 69 figs 30.9-10
References:

Trujillo,E.F. (1960):
Upper Cretaceous formaninifera from near Reding, California . Journal of Paleontology Vol. 34 p. 290-346

Caron,M. (1985):
Cretaceous planktic foraminifera.
In: Plankton stratigraphy Eds: Bolli, H.M.Saunders, J.B.Perch-Nielsen, K. p. 17–86

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Taxon relations
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Ranking (experimental)