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Dicarinella hagni


Classification: pf_mesozoic -> Globotruncanidae -> Dicarinella -> Dicarinella hagni
Sister taxa: D. asymetrica, D. bouldinensis, D. canaliculata, D. concavata, D. hagni, D. imbricata, D. longoriai, D. marianosi, D. primitiva, D. roddai, D. takayanagii, D. sp.,

Taxonomy

Citation: Dicarinella hagni (Scheibnerova, 1962)
Rank: Species
Basionym: Praeglobotruncana hagni

Type images:

Original description: Praeglobotruncana hagni Scheibnerova 1962: 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.

Entries in the Catalog of original descriptions: Praeglobotruncana hagni;

Geological Range:
Last occurrence (top): within D. concavata zone (86.71-89.91Ma, top in Coniacian 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 occurrence data:

NB Plotting of Neptune data has been disabled on the Mesozoic pages because the dataset is both small and badly affected by a few sites with erroneous age models (our obs Huber, Petrizzo, Young, Nov 2016). The data can still be viewed via the range plottertool - tools menu.

Character matrix

test outline:Subcircularcoiling axis:Moderate-highchamber arrangement:Trochospiralumbilicus:Narrow
edge view:Equally biconvexumbilical or test sutures:Moderately depressedspiral sutures:Raised beadedshell porosity:Microperforate: <1
wall texture:Finely pustuloseaperture:Umb.-extraumbilicalaperture border:Thin porticusaccessory apertures:None
periphery:Double keelumb chamber shape:Trapezoidalsp chbr shape:Petaloidperiph margin shape:Subangular
umb depth:Deepdiameter mm:0.702 mmwidth mm:0.648 mmbreadth mm:0.378 mm
final-whorl chambers:6.0-8.0

References:

Scheibnerova 1962 [sorry, not in our bibliography yet]


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Dicarinella hagni compiled by the pforams@mikrotax project team viewed: 27-7-2017

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