pforams@mikrotax - Globotruncanita atlantica pforams@mikrotax - Globotruncanita atlantica

Globotruncanita atlantica


Classification: pf_mesozoic -> Globotruncanidae -> Globotruncanita -> Globotruncanita atlantica
Sister taxa: G. angulata, G. atlantica, G. conica, G. elevata, G. insignis, G. pettersi, G. stuarti, G. stuartiformis, G. sp.

Taxonomy

Citation: Globotruncanita atlantica (Caron, 1972)
Taxonomic rank: species
Basionym: Globotruncana atlantica

Type images:

Original description: "Test high trochospiral, spiral side strongly convex, umbilical side flat to slightly convex; equatorial periphery slightly lobulate, with a single keel. Last whorl with 6-7 chambers which increase slowly in size. Sutures on spiral side angular to curved in the youngest chambers, on the umbilical side angular, forming disjointed chevrons. Umbilicus narrow, shallow, covered by a spiral system of tegilla."

Entries in the Catalog of original descriptions: Globotruncana atlantica

Character matrix
test outline:Subcircularchamber arrangement:Trochospiraledge view:Spiroconvexaperture:Umbilical
sp chamber shape:Crescenticcoiling axis:Moderate-highperiphery:Single keelaperture border:Thick porticus
umb chbr shape:Petaloidumbilicus:Narrowperiph margin shape:Subangularaccessory apertures:Intralaminal
spiral sutures:Raised beadedumb depth:Deepwall texture:Finely pustuloseshell porosity:
umbilical or test sutures:Weakly depressedfinal-whorl chambers:6-7 N.B. These characters are used for advanced search. N/A - not applicable

Geological Range:
Last occurrence (top): within R. calcarata zone (75.06-75.91Ma, top in Campanian 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:

Almogi-Labin, A., Reiss, Z & Caron, M. (1986). Senonian globotruncanidae from Israel. Eclogae Geologicae Helvetiae. 79(3): 849-895. gs O

Caron, M. (1972). Planktonic foraminifera from the Upper Cretaceous of Site 98. Leg 11. Deep Sea Drilling Project. Initial Reports of the Deep Sea Drilling Project. 11: 551-559. gs

Petrizzo, M. R., Falzoni, F. & Premoli Silva, I. (2011). Identification of the base of the lower-to-middle Campanian Globotruncana ventricosa Zone: Comments on reliability and global correlations. Cretaceous Research. 32: 387-405. gs


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Globotruncanita atlantica compiled by the pforams@mikrotax project team viewed: 11-6-2026

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Short stable page link: https://mikrotax.org/pforams/index.php?id=110191 Go to Archive.is to create a permanent copy of this page - citation notes



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