nmn

Contusotruncana patelliformis


Classification: pf_mesozoic -> Globotruncanidae -> Contusotruncana -> Contusotruncana patelliformis
Sister taxa: C. contusa, C. fornicata, C. morozovae, C. patelliformis, C. plicata, C. plummerae, C. walfischensis,

Taxonomy

Citation: Contusotruncana patelliformis (Gandolfi, 1955)
Rank: Species
Basionym: Globotruncana contusa patelliformis
Synonyms: Globotruncana contusa witwickae
Similar species: G. contusa contusa [copied from Chronos database]

Type images:

Original description: Globotruncana contusa patelliformis Gandolfi 1955: "Form more convex on the dorsal side than Globotruncana contusa subsp. Scutilla Gandolfi, 1955, the convexity being more pronounced in the last stages; last chambers higher, petaloid and often undulated; sutural elevations thinner and frequently split on the dorsal side into the lines of beads. The form is double-keeled, becoming often single-keeled in the more adult stages. The umbilical cavity is large, the umbilical lips are thin and slightly more arched than in Globotruncana contusa scutilla and Globo truncana contusa subsp. Contusa (Cushman)."

Entries in the Catalog of original descriptions: Globotruncana contusa patelliformis;
Globotruncana contusa witwickae;

Geological Range:
Last occurrence (top): within A. mayaroensis zone (67.30-69.18Ma, top in Maastrichtian stage). Data source: [copied from Chronos database]
First occurrence (base): within G. ventricosa zone (76.18-79.20Ma, base in Campanian 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:Subpolygonalcoiling axis:Highchamber arrangement:Trochospiralumbilicus:Wide
edge view:Spiroconvexumbilical or test sutures:Moderately depressedspiral sutures:Moderately depressedshell porosity:
wall texture:Finely pustuloseaperture:Umbilicalaperture border:Thick porticusaccessory apertures:Intralaminal
periphery:Double keelumb chamber shape:Crescenticsp chbr shape:Crescenticperiph margin shape:Subangular
umb depth:Deepdiameter mm:0.43width mm:breadth mm:0.29
final-whorl chambers:4.0-5.0

References:

Gandolfi, R., (1955). The genus Globotruncana in northeastern Colombia. Bull. Am. Paleontol., 36: 1-118.


Contusotruncana patelliformis compiled by the pforams@mikrotax project team viewed: 29-5-2017

Taxon Search:
Advanced Search




Comments (0)

No comments yet. Be the first!

Add Comment

* Required information
1000
Captcha Image
Powered by Commentics