pforams@mikrotax - Globotruncanella havanensis pforams@mikrotax - Globotruncanella havanensis

Globotruncanella havanensis


Classification: pf_mesozoic -> Globotruncanidae -> Globotruncanella -> Globotruncanella havanensis
Sister taxa: G. compressiformis, G. havanensis, G. minuta, G. petaloidea, G. pschadae, G. semsalensis, G. sp.

Taxonomy

Citation: Globotruncanella havanensis (Voorwijk, 1937)
taxonomic rank: Species
Basionym: Globotruncana havanensis

Type images:

Original description: Trochoidal, dorsal side convex, ventral side concave. Ventral side showing only the last formed whorl with 4-5 chambers. The chambers are rather compressed and each chamber is partly overlapped by the preceding one. The periphery has no keel. Umbilicus on the ventral side.

Entries in the Catalog of original descriptions: Globotruncana havanensis

Character matrix
test outline:Lobatechamber arrangement:Trochospiraledge view:Spiroconvexaperture:Umbilical-extraumbilical
sp chamber shape:Petaloidcoiling axis:Low-moderateperiphery:aperture border:Thin porticus
umb chbr shape:Petaloidumbilicus:Narrowperiph margin shape:Subangularaccessory apertures:Intralaminal
spiral sutures:Moderately depressedumb depth:Deepwall texture:Finely pustuloseshell porosity:Finely Perforate: 1-2.5µm
umbilical or test sutures:Moderately depressedfinal-whorl chambers:4-5 N.B. These characters are used for advanced search. N/A - not applicable

Geological Range:
Last occurrence (top): within A. mayaroensis zone (67.64-69.27Ma, 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 range and occurrence data:

References:

Pessagno, E. A. (1967). Upper Cretaceous planktonic foraminifera from the western Gulf Coastal Plain. Palaeontographica Americana. 5: 245-445. gs O

Voorwijk, G. H. (1937). Foraminifera from the Upper Cretaceous of Habana, Cuba. Proceedings of the Koninklijke Nederlandse Akademie van Wetenschappen. 40: 190-198. gs


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Globotruncanella havanensis compiled by the pforams@mikrotax project team viewed: 25-6-2024

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Short stable page link: https://mikrotax.org/pforams/index.php?id=110181 Go to Archive.is to create a permanent copy of this page - citation notes



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