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Rotalipora cushmani


Classification: pf_mesozoic -> Rotaliporidae -> Rotalipora -> Rotalipora cushmani
Sister taxa: R. cushmani, R. montsalvensis, R. praemontsalvensis, R. sp.
Daughter taxa: (blue => in age window 0-800Ma)
Rotalipora cushmani var. evoluta

Taxonomy

Citation: Rotalipora cushmani (Morrow, 1934)
Rank: Species
Basionym: Globorotalia cushmani
Synonyms: Globotruncana alpina; Globotruncana (Rotalipora) turonica expansa; Rotalipora pommerana; Rotalipora turonica
Taxonomic discussion: This species is provided with lingulae sensu Longoria and Gamper, 1975 and secondary apertures in sutural position. The main and secondary apertures are rimmed (see SEM illustrations of the topotype in Robaszynski and Caron, 1979, pl. 7, figs 1b, 1c; Eicher and Worstell, 1970, pl. 12 figs 3a, 3b and Wonders, 1980, pl. 3, fig. 3b). [copied from Chronos database]

Type images:

Original description: Test trochoid, dorsal side moderately convex with chambers flattened or slightly inflated, dorsal sutures roundly curving, producing a scalloped periphery; the anterior margin sometimes raised slightly, ventral side strongly convex with the chambers strongly inflated, sutures deeply grooved and nearly radiate; only the last whorl, or 4-6 chambers visible, the periphery sharply rounded and thickened into a narrow rim.

Entries in the Catalog of original descriptions: Globorotalia cushmani, Globotruncana alpina, Globotruncana (Rotalipora) turonica expansa, Rotalipora pommerana, Rotalipora turonica

Geological Range:
Last occurrence (top): at top of R. cushmani zone (100% up, 94Ma, in Cenomanian stage). Data source: zonal marker (from Timescale Creator)
First occurrence (base): at base of R. cushmani zone (0% up, 95.9Ma, in Cenomanian stage). Data source: zonal marker (from Timescale Creator)

Plot of range and occurrence data:

Character matrix

test outline:Lobatechamber arrangement:Trochospiraledge view:Concavo-convexaperture:Umbilical-extraumbilical
sp chamber shape:Petaloidcoiling axis:Low-moderateperiphery:Single keelaperture border:Thin lip
umb chbr shape:Subtriangularumbilicus:Wideperiph margin shape:Subangularaccessory apertures:Sutural
spiral sutures:Raised beadedumb depth:Shallowwall texture:Finely pustuloseshell porosity:Finely Perforate: 1-2.5µm
umbilical or test sutures:Moderately depressedfinal-whorl chambers:5.0-8.0 N.B. These characters are used for advanced search. N/A - not applicable

References:

Eicher, D. L. & Worstell, P. (1970). Lunatriella, a Cretaceous heterohelicid foraminifer from the western interior of the United States. Micropaleontology. 16(1): 117-121. gs

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

Morrow, A. L. (1934). Foraminifera and ostracoda from the Upper Cretaceous of Kansas. Journal of Paleontology. 8: 186-205. gs

Pessagno, E. A. (1967). Upper Cretaceous planktonic foraminifera from the western Gulf Coastal Plain. Palaeontographica Americana. 5: 245-445. gs V O

Postuma, J. A. (1971). Manual of planktonic foraminifera. Elsevier for Shell Group, The Hague. 1-406. gs

Robaszynski, F., Caron, M. & le Groupe de Travail Européen des Foraminifères Planctoniques (1979). Atlas des Foraminiféres Planctoniques du Crétace Moyen (Mer Boréale et Téthys). Cahiers de Micropaléontologie. 1 & 2: 1-185. gs


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Rotalipora cushmani compiled by the pforams@mikrotax project team viewed: 23-11-2020

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Short stable page link: http://mikrotax.org/pforams/index.php?id=110493 Go to Archive.is to create a permanent copy of this page - citation notes



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