Taxonomy
Original description:
Translated using Google translate from German. Original text below
Diagnosis: A species with the characteristics of the genus Ventilabrella with the following peculiarities: The number of chambers is much larger than in the other species of the genus. The two-line part is relatively small. The adult part is very flat compressed.
Description: The test is subtriangular, sometimes wider than high. After a small, only in diaphanous light clearly visible hiserialen beginning part widened it quickly. The adult stage consists of a large number of fan-shaped in a plane arranged chambers. At ¼ height of the case, where this shows its greatest thickness, these chambers are somewhat bloated. The adult chambers are separated by weakly serrated seams, some of which are unclear. The shape of the chambers is irregular. Ornamentation is almost always absent in typical individuals; at most, one occasionally notices a slight longitudinal striation, especially at the more inflated chambers of the thicker chamber portion.
Diagnose : Eine Art mit den Merkmalen der Gattung Ventilabrella mit folgenden Besonderheiten: Die Zahl der Kammern ist viel größer als bei den anderen Arten der Gattung. Der zweizeilige Teil ist verhältnismäßig klein. Der Erwachsenen-Teil ist sehr stark flach zusammengedrückt.Entries in the Catalog of original descriptions: Ventilabrella multicamerata, Ventilabrella alpina, Planoglobulina meyerhoffi
Geological Range:
Last occurrence (top): within P. hariaensis zone (66.39-67.30Ma, top in Maastrichtian stage). Data source: [copied from Chronos database]
First occurrence (base): within G. havanensis zone (74.00-75.71Ma, base in Campanian stage). Data source: [copied from Chronos database]
Plot of range and occurrence data:
Character matrix
test outline: | Palmate | chamber arrangement: | Multiserial | edge view: | Compressed | aperture: | Multiple |
sp chamber shape: | Inflated | coiling axis: | N/A | periphery: | N/A | aperture border: | Thin flange |
umb chbr shape: | Inflated | umbilicus: | N/A | periph margin shape: | Narrowly rounded | accessory apertures: | N/A |
spiral sutures: | Moderately depressed | umb depth: | N/A | wall texture: | Vermiculate | shell porosity: | Finely Perforate: 1-2.5µm |
umbilical or test sutures: | Moderately depressed | final-whorl chambers: | 6.0-10.0 | N.B. These characters are used for advanced search. N/A - not applicable |
de Klasz, I. (1953a). Einige neue oder wenig bekannte Foraminiferen aus der helvetischen Oberkreide der bayerischen Alpen, südlich Traunstein (Oberbayern). Geologica Bavarica. 17: 223-244. gs V O Pessagno, E. A. (1967). Upper Cretaceous planktonic foraminifera from the western Gulf Coastal Plain. Palaeontographica Americana. 5: 245-445. gs V O Smith, C. C. & Pessagno, E. A. (1973). Planktonic foraminifera and stratigraphy of the Corsicana formation (Maestrichtian) North-central Texas. Cushman Foundation for Foraminiferal Research, Special Publication. 12: 1-67. gs V OReferences:
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Planoglobulina multicamerata compiled by the pforams@mikrotax project team viewed: 21-4-2021
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