pforams@mikrotax - Dicarinella primitiva

Dicarinella primitiva

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


Citation: Dicarinella primitiva (Dalbiez, 1955)
Rank: Species
Basionym: Globotruncana ventricosa primitiva
Synonyms: Globotruncana kuepperi

Type images:

Original description: Test of medium size, periphery slightly to distinctly lobate with one double keel or two very close keels. Spiral side flat to very slightly concave; sutures curved, limbate; generally 6 chambers in the last whorl, increasing regularly. Umbilical side with wide umbilicus; generally 6 moderately inflated chambers visible. 

Entries in the Catalog of original descriptions: Globotruncana (Globotruncana) ventricosa primitiva, Globotruncana kuepperi

Emended description:


Wall type:


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 M. schneegansi zone (89.91-92.56Ma, base in Turonian stage). Data source: [copied from Chronos database]

Plot of range and occurrence data:

Character matrix
test outline:Subcircularchamber arrangement:Trochospiraledge view:Planoconvexaperture:-
sp chamber shape:Petaloidcoiling axis:Low-moderateperiphery:Double keelaperture border:Thin porticus
umb chbr shape:Trapezoidalumbilicus:Wideperiph margin shape:Subangularaccessory apertures:None
spiral sutures:Raised beadedumb depth:Deepwall texture:Finely pustuloseshell porosity:-
umbilical or test sutures:Moderately depressedfinal-whorl chambers:5.0-6.0 N.B. These characters are used for advanced search. N/A - not applicable


Dalbiez, F. (1955). The genus Globotruncana in Tunisia. Micropaleontology. 1(2): 161-171. gs

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


Dicarinella primitiva compiled by the pforams@mikrotax project team viewed: 6-7-2022

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