Marginotruncana renzi Gandolfi 1942 from: Caron, M. (1985): Cretaceous planktic foraminifera. In: Plankton stratigraphy Eds: Bolli, H.M.Saunders, J.B.Perch-Nielsen, K. p. 17–86 | . |
Notice: This catalogue page may contain unedited data.
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Species Marginotruncana renzi Gandolfi 1942 |
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| Discussion / Comments: |
Caron (1985):
It may be difficult to separate M. renzi from M. sigali, M.
schneegansi or M. sinuosa. Typically, M. renzi has a iconvex, fairly low trochospiral test, with 5-6 chambers forming the last whorl and increasing slowly in size. The two closely spaced keels merge into a single one on the last or the last few chambers. Sutures are curved and raised in both spiral and umbilical sides. M. renzi differs from M. sigali in its double keel, from M. schneegansi in its raised umbilical sutures and from M. sinuosa in its petaloid-shaped chambers on the spiral side. For a more complete diagnosis and remarks on the status of M. renzi reference is made to Robaszynski & Caron, 1979,
vol. 2, p. 133. |
| Systematics: |
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Classis Foraminifera
Familia Globotruncanidae
Genus Marginotruncana
Species Marginotruncana renzi
Species Marginotruncana sigali
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| Synonym list: |
Caron (1985):
1942 Globotruncana renzi Gandolfi. - Gandolfi : 124-125 pl 3 fig 1 pl 4 fig 16 No holotype was designated by Gandolfi, 'holotype' written on his
original slide refers to the specimen illustrated in his pl 3, fig. 1
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| References: |
Gandolfi,R. (1942):
Ricerche micropaleontologiche e stratigraphiche sulla Scaglia e sul Flysch cretacici dei dintorni di Balerna (Canton Ticino) . Rivista Italiana di PaleontologiaMemoria 4 p. 1-160
Robaszynski,F. and Caron,M. (1979):
Atlas de Foraminiferes planctoniques du Cretace moyen. Part 2 . Cahiers de Micropaléontologie Vol. 2 p. 1-185
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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