Taxonomy
Original description: Test circular. Spiral side flat with 2 1/1 -3 whorls, which enlarge rapidly in width. Last volution presents seven to ten narrow, distinctly bent chambers, the sutures of which stand apart as small borders. Umbilical side arched, wide, and with flat umbilicus, the latter with granules of a callus-like test surface. Border sharp, notched, and surrounded by a small ridge. Aperture an opening at the inner margin of the last chamber and slightly covered by a callus-like test material.
Entries in the Catalog of original descriptions: Rotalia deeckei
Character matrix
test outline: | Subcircular | chamber arrangement: | Trochospiral | edge view: | Planoconvex | aperture: | Umbilical-extraumbilical |
sp chamber shape: | Crescentic | coiling axis: | Very low | periphery: | Single keel | aperture border: | Thin flange |
umb chbr shape: | Subrectangular | umbilicus: | Narrow | periph margin shape: | Subangular | accessory apertures: | Umbilical |
spiral sutures: | Raised beaded | umb depth: | Deep | wall texture: | Smooth | shell porosity: | Finely Perforate: 1-2.5µm |
umbilical or test sutures: | Raised beaded | final-whorl chambers: | 7-9 | N.B. These characters are used for advanced search. N/A - not applicable |
Geological Range:
Last occurrence (top): within W. archaeocretacea zone (93.52-94.03Ma, top in Turonian stage). Data source: [copied from Chronos database]
First occurrence (base): within R. cushmani zone (94.03-98.69Ma, base in Cenomanian stage). Data source: [copied from Chronos database]
Plot of range and occurrence data:
Falzoni, F., Petrizzo, M. R., Jenkyns, H. C., Gale, A. S. & Tsikos, H. (2016). Planktonic foraminiferal biostratigraphy and assemblage composition across the Cenomanian–Turonian boundary interval at Clot Chevalier (Vocontian Basin, SE France). Cretaceous Research. 59: 69-97. gs Franke, A. (1925). Die Foraminiferen der pommerschen Kreide. Abhandlugen der Geologischen-Palaeontologischen Inst, Greifswald Univ. 6: 1-96. gsReferences:
Thalmanninella deeckei compiled by the pforams@mikrotax project team viewed: 9-9-2024
Short stable page link: https://mikrotax.org/pforams/index.php?id=110543 Go to Archive.is to create a permanent copy of this page - citation notes |
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