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Species Planomalina praebuxtorfi Wonders 1975 |
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Diagnosis / Definition: |
Gasinski (1988):
Dimensions: D = 0.40-0.75 mm, t = 0.15-0.40 mm |
Discussion / Comments: |
Gasinski (1988):
Remarks: The specimens are similar to those illustrated by Wonders (1975)
from El Burrueco (Spain) and by Sigal (1979) from Leg 47 B, DSDP Site
398. Intermediate forms between ancestral G. bentonensis and P. buxtorji
have been encountered. Many authors have followed Wonders (1975, 1980)
and separated these intermediate forms as P. praebuxtorfi (Robaszynski &
Caron, 1979; Leckie, 1984; Caron, 1985). It is used here as an index form
and zonal marker (Figure 7).
Local stratigraphic range: First Appearance Datum (FAD) and Last
pearance Datum (LAD) within R. ticinensis- P. praebuxtorfi Zone
below). |
Systematics: |
22 Superfamilia Globigerinaceae
Familia Planomalinidae
Genus Planomalina
Species Planomalina praebuxtorfi
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Synonym list: |
Gasinski (1988):
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Was used in synonym list of: |
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References: |
Wonders,A.A.H. (1975): Cretaceous planktonic foraminifera of the Planomalina buxtorfi group from El Burrueco, southern Spain . Koninklijke Nederlandse Akademie van Wetenschappen, Amsterdam, Proceedings, Series B Vol. 78 p. 83-93
Gasinski,M.A.. (1988): Foraminiferal biostratigraphy of the Albian and Cenomanian sediments in the Polish part of the Pieniny Klippen Belt, Carpathian Mountains. . Cretaceous Research Vol. 9 p. 217-247
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