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Species Marginotruncana sigali Reichel 1950


Discussion / Comments:
Caron (1985):
Like M. renzi, M. schneegansi and M. sinuosa, M. sigali has a biconvex test but differs from these in its roughly pustulose keels merging into a single one in the last whorl. As is the case in all Marginotruncana species, the double keel on the early whorls remains visible in thin section.
Systematics:

5
 Classis Foraminifera
  Familia Globotruncanidae
   Genus Helvetoglobotruncana
    Species Helvetoglobotruncana praehelvetica
     Species Marginotruncana sigali
Synonym list:
Caron (1985):
1950 Globotruncana (Globotruncana) sigali Reichel. - Reichel : p.610 figs 5a-c
1985 Marginotruncana sigali Reichel. - Caron : 63, 64 figs 27.7-8
References:

Reichel,M. (1950):
Observations sur les Globotruncana du grisement de la Breggia (Tessin) . Ecoglae geologicae Helvetiae Vol. 42 p. 596-617

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