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Dicarinella imbricata


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

Taxonomy

Citation: Dicarinella imbricata (Mornod, 1950)
Rank: Species
Basionym: Globotruncana imbricata

Type images:

Original description: Globotruncana imbricata Mornod 1950: French translation: Small shell with a trochospiral, dextral coiling, convex spiral side, concave umbilical side, equatorial periphery slightly lobulate, except for the two last chambers (the last chamber in the paratype) which are large, globular and devoid of the two carinal ridges that ornament the preceding chambers.

Entries in the Catalog of original descriptions: Globotruncana imbricata;

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 R. cushmani zone (94.03-95.94Ma, base in Cenomanian 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:Lobatecoiling 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:Umbilicalaperture border:Thin porticusaccessory apertures:None
periphery:Imperforate bandumb chamber shape:Subtriangularsp chbr shape:Petaloidperiph margin shape:Subangular
umb depth:Deepdiameter mm:0.61width mm:breadth mm:0.37
final-whorl chambers:5.0-6.0

References:

Mornod, L., (1950). Les Globorotalides du Cretace superieur du Montsalvens (Prealpes fribourgeoises). Eclogae Geologicae Helvetiae, 42(2): 573-595.


Dicarinella imbricata compiled by the pforams@mikrotax project team viewed: 30-5-2017

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