Taxonomy
Original description: Translation from French: some specimens from the R. appenninica appenninica type level show that the keel extended along the sutures reaching the periumbilical ridges of each chamber. In addition, the last two chambers gradually deepen towards the umbilicus.
Entries in the Catalog of original descriptions: Rotalipora appenninica gandolfii
Character matrix
test outline: | Subcircular | chamber arrangement: | Trochospiral | edge view: | Equally biconvex | aperture: | Umbilical-extraumbilical |
sp chamber shape: | Petaloid | coiling axis: | Low-moderate | periphery: | Single keel | aperture border: | Thin lip |
umb chbr shape: | Trapezoidal | umbilicus: | Wide | periph margin shape: | Subangular | accessory apertures: | Umbilical |
spiral sutures: | Raised beaded | umb depth: | Shallow | wall texture: | Finely pustulose | shell porosity: | Macroperforate: >2.5µm |
umbilical or test sutures: | Raised beaded | final-whorl chambers: | 5-7 | N.B. These characters are used for advanced search. N/A - not applicable |
Geological Range:
Last occurrence (top): within T. globotruncanoides zone (98.85-100.50Ma, top in Cenomanian stage). Data source: [copied from Chronos database]
First occurrence (base): within P. appenninica zone (100.50-101.92Ma, base in Albian stage). Data source: [copied from Chronos database]
Plot of range and occurrence data:
Leckie, M. (1984). Mid-Cretaceous planktonic foraminiferal biostratigraphy off Central Morocco, Deep Sea Drilling Project Leg 79, Sites 545 and 547. Initial Reports of the Deep Sea Drilling Project. 79: 579-620. gs Luterbacher, H. & Premoli Silva, I. (1962). Note préliminaire sur une révison du profil de Gubbio, Italie. Rivista Italiana di Paleontologia e Stratigrafia. 68(2): 253-288. gs Petrizzo, M. R. & Huber, B. T. (2006). Biostratigraphy and taxonomy of late Albian planktonic foraminifera from ODP Leg 171B (western North Atlantic Ocean). Journal of Foraminiferal Research. 36: 166-190. gsReferences:
Thalmanninella gandolfii compiled by the pforams@mikrotax project team viewed: 13-10-2024
Short stable page link: https://mikrotax.org/pforams/index.php?id=110545 Go to Archive.is to create a permanent copy of this page - citation notes |
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