nmn

Dicarinella primitiva


Classification: pf_mesozoic -> Globotruncanidae -> Dicarinella -> Dicarinella primitiva
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 primitiva (Dalbiez, 1955)
Rank: Species
Basionym: Globotruncana ventricosa primitiva
Synonyms: Globotruncana kuepperi

Type images:

Original description: Globotruncana ventricosa primitiva Dalbiez 1955: "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. Diameter ca. 0.495 mm."

Entries in the Catalog of original descriptions: Globotruncana kuepperi; Globotruncana ventricosa primitiva;

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 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:Low-moderatechamber arrangement:Trochospiralumbilicus:Wide
edge view:Planoconvexumbilical 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:0.495width mm:breadth mm:
final-whorl chambers:5.0-6.0

References:

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


logo

Dicarinella primitiva compiled by the pforams@mikrotax project team viewed: 23-7-2017

Taxon Search:
Advanced Search

Go to Archive.is to create a permanent copy of this page - citation notes



Comments (0)

No comments yet. Be the first!

Add Comment

* Required information
1000
Captcha Image
Powered by Commentics