pforams@mikrotax - Dicarinella hagni

Citation: Dicarinella hagni (Scheibnerova, 1962)

Basionym: Praeglobotruncana hagni

Original description: Test of medium size, biconvex, with umbilical side more convex than spiral one. The periphery with two quite closely spaced keels. The chambers of both sides slightly inflated. The last chamber more inflated than the others. In the last whorl 6-8 chambers. Chambers of the umbilical side covered by tubercles, the spiral side smooth. Umbilicus deep, narrow. The aperture interiomarginal; the accessory apertures not observed. Sutures radial, depressed.

Geological Range:
Last occurrence (top): within D. concavata zone (85.60-89.75Ma, top in Santonian stage). Data source: [copied from Chronos database]
First occurrence (base): within H. helvetica zone (92.51-93.52Ma, base in Turonian stage). Data source: [copied from Chronos database]

References:

Falzoni, F., Petrizzo, M. R., Jenkyns, H. C., Gale, A. S. & Tsikos, H. (2016). 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. Cretaceous Research. 59: 69-97. gs

Huber, B. T., Petrizzo, M. R., Watkins, D. K., Haynes, S. J. & MacLeod, K. G. (2017a). Huber, B. T., Petrizzo, M. R., Watkins, D. K., Haynes, S. J. & MacLeod, K. G. (2017). Correlation of Turonian continental margin and deep-sea sequences in the subtropical Indian Ocean sediments by integrated planktonic foraminiferal and calcareous nannofossil biostratigraphy. Newsletters on Stratigraphy. 50: 141-185. Newsletters on Stratigraphy. 50: 141-185. gs

Leckie, M. (1985). Leckie, M. (1985). Foraminifera of the Cenomanian-Turonian boundary interval, Greenhorn Formation, Rock Canyon Antoicline, Pueblo, Colorado. In, Pratt, L. M. , Kauffman, E. G. & Zelt, F. B. (eds) Fine-grained deposits and biofacies of the Cretaeous Wesern Interior Seaway: Evidence of cyclic sedimentary processes. SEPM Field Trip Guidebook. 4: 139-149. In, Pratt, L. M., Kauffman, E. G. & Zelt, F. B. (eds) Fine-grained deposits and biofacies of the Cretaeous Wesern Interior Seaway: Evidence of cyclic sedimentary processes. SEPM Field Trip Guidebook . 4: 139-149. gs

Robaszynski, F., Caron, M. & le Groupe de Travail Européen des Foraminifères Planctoniques (1979). 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. Cahiers de Micropaléontologie. 1 & 2: 1-185. gs

Scheibnerová, V. (1962). Scheibnerová, V. (1962). Stratigrafia strednej a vrchnej kriedy tetydní oblasti na zaklade globotruncanid - Stratigraphy of the Middle and Upper Cretaceous of the Tethyan region on the basis of the Globotruncanids. Geologiscky Zbornik -Geologica Carpathica. 13(2): 219-226. Geologiscky Zbornik -Geologica Carpathica. 13(2): 219-226. gs

test outline:	Subcircular	chamber arrangement:	Trochospiral	edge view:	Equally biconvex	aperture:	Umbilical-extraumbilical
sp chamber shape:	Petaloid	coiling axis:	Moderate-high	periphery:	Double keel	aperture border:	Thin porticus
umb chbr shape:	Trapezoidal	umbilicus:	Narrow	periph margin shape:	Subangular	accessory apertures:	None
spiral sutures:	Raised beaded	umb depth:	Deep	wall texture:	Finely pustulose	shell porosity:	Microperforate: <1µm
umbilical or test sutures:	Moderately depressed	final-whorl chambers:	6-8	N.B. These characters are used for advanced search. N/A - not applicable

Dicarinella hagni

References:

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