Guembelitria cenomana Keller 1935 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 Guembelitria cenomana Keller 1935 |
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Discussion / Comments: |
Caron (1985):
The species differs from G. cretacea only in its low apertural
arch.
Kroon & Nederbragt (1990):
The test is covered by pore mounds, that are
concentrated on the chambers of the last whorls. The aperture is a broad, low arc with lip and toothplate. The type descriptions of G. cenomana, G. harrisi and G. kegeli are nearly identical as far as the shape of the test is concerned and we consider G. cenomana the senior synonym. G. graysonensis is a form with terminal multiserial growth.
Guembelitria cenomana has been described from Upper Albian to Lower Turonian sediments, in North and South America and Russia. We found it in sample 1K291 from Cenomanian sediments in West Tunisia (see also Postuma, 1971) and in Eocene (?) samples T25 and T90 from Tanimbar, Indonesia, which contain reworked, small-sized Cretaceous foraminifera only [for details, see De Smet et al., submitted (a) ]. |
Systematics: |
5 Classis Foraminifera
Familia Heterohelicidae
29 Subordo Globigerinina
Superfamilia Heterohelicicea
Familia Guembelitriidae
Genus Guembelitria
Species Guembelitria cenomana
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Synonym list: |
Caron (1985):
Kroon & Nederbragt (1990):
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References: |
Keller,B.M. (1935): Microfauna of the Upper Cretaceous of the Dnieper-Donetz basin and ajoining areas . Moskov Obshch. Ispytaley Prirody Byull. Otdel Geol. Vol. 13 p. 522-558
Tappan,H. (1940): Foraminifera from the Grayson Formation of northern Texas . Journal of Paleontology Vol. 14 p. 93-126
Petri,S.. (1962): Foraminiferos Cretaceos de Sergipe. Vol. 265 p. 101-140
Eicher,D.L. and Worstell,P. (1970): Cenomanian and Turonian foraminifera from the Great Plains, United States . Micropaleontology Vol. 16 p. 269–324
Caron,M. (1985): Cretaceous planktic foraminifera. In: Plankton stratigraphy Eds: Bolli, H.M.Saunders, J.B.Perch-Nielsen, K. p. 17–86
Kroon,D. and Nederbragt,A.J. (1990): Ecology and Paleoecology of Triserial Planktic Foraminifera . Marine Micropaleontology Vol. 16 p. 25-38
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