pforams@mikrotax - Marginotruncana marginata

Marginotruncana marginata


Classification: pf_mesozoic -> Globotruncanidae -> Marginotruncana -> Marginotruncana marginata
Sister taxa: M. angusticarenata, M. caronae, M. coronata, M. desioi, M. manaurensis, M. marginata, M. paraconcavata, M. pileoliformis, M. pseudolinneiana, M. renzi, M. schneegansi, M. sigali, M. sigmoconcavata, M. sinuosa, M. tarfayaensis, M. undulata, M. sp.

Taxonomy

Citation: Marginotruncana marginata (Reuss, 1845)
Rank: Species
Basionym: Rosalina marginata
Synonyms: Globotruncana fresnoensis;  Thalmanninella wicheri; Dicarinella marginata;

Taxonomic discussion:
Holotype images in E+M online catalogue not very good. [copied from Chronos database]

Type images:

Original description: 0,25—0,6'"gross, kreisrund, sehrniedergedrückt, scheiben- förmig. Das Gewinde sehr wenig erhaben, aus zwei Umgängen bestehend; der lezte mit 6 Kammern. Im Ganzen 10—12 Kammern, oval, sehr schief, bogenförmig. Jede ist auf der obern Fläche am äussern Rande mit einem sehr schmalen, erhabenen Saume eingefasst, in der Mitte sehr flach gewölbt oder selbst seicht konkav ; an der untern Fläche sind sie massig gewölbt und durch wenig tiefe Nähte gesondert die ,viel weniger schief verlaufen, als auf der obern Fläche. Der äussere Umfang der Kammern senkrecht abgestutzt. Die untere Fläche weit genabelt. Die Oberfläche des ganzen Gehäuses mit kleinen Spitzen dicht übersäet. T. VIII, F. 54 stellt einen Steinkern dar.

Entries in the Catalog of original descriptions: Rosalina marginata, Globotruncana fresnoensis, Thalmanninella wicheri


Emended description: Test low trochospiral, biconvex; equatorial periphery slightly lobate; axial periphery angular, with two keels separated by a narrow peripheral band which sometimes does not truncate the globular profile of the chambers. Chambers inflated, petaloid, irregularly increasing in size as added on spiral side; trapezoidal, globular on umbilical side; 5-8 chambers in final whorl. On spiral side sutures oblique and depressed to slightly raised. On umbilical side sutures depressed appearing radial,but marked by a largely U-shaped sigmoidal rims. Umbilicus wide and deep. Aperture interiomarginal, extraumbilical-umbilical, with portici. [copied from Chronos database]

Geological Range:
Last occurrence (top): within D. asymetrica zone (84.19-86.71Ma, top in Santonian stage). Data source: [copied from Chronos database]
First occurrence (base): within H. helvetica zone (92.56-93.52Ma, base in Turonian stage). Data source: [copied from Chronos database]

Plot of range and occurrence data:

Character matrix
test outline:Lobatechamber arrangement:Trochospiraledge view:Equally biconvexaperture:Umbilical-extraumbilical
sp chamber shape:Petaloidcoiling axis:Lowperiphery:Double keelaperture border:Coalescing portici
umb chbr shape:Trapezoidalumbilicus:Wideperiph margin shape:Subangularaccessory apertures:None
spiral sutures:Raised beadedumb depth:Deepwall texture:Smoothshell porosity:
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:

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

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

Reuss, A. E. (1845a). Die Versteinerungen der böhmischen Kreide-formation. E. Schweizebart, Stuttgart. 1-58. gs V O

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

Robaszynski, F., Caron, M., Gonzales Donoso, J. M., Wonders, A. A. H. & the European Working Group on Planktonic Foraminifera (1984). Atlas of Late Cretaceous globotruncanids. Revue de Micropaléontologie. 26(3-4): 145-305. gs


logo

Marginotruncana marginata compiled by the pforams@mikrotax project team viewed: 21-9-2021

Taxon Search:
Advanced Search

Short stable page link: https://mikrotax.org/pforams/index.php?id=110334 Go to Archive.is to create a permanent copy of this page - citation notes



Comments (0)

No comments yet on this page. Please do add comments if you spot any problems, or have information to share

Add Comment

* Required information
1000
Captcha Image
Powered by Commentics