Taxonomy
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: | Subcircular | chamber arrangement: | Trochospiral | edge view: | Spiroconvex | aperture: | Umbilical |
| sp chamber shape: | Crescentic | coiling axis: | Moderate-high | periphery: | Single keel | aperture border: | Thick porticus |
| umb chbr shape: | Petaloid | umbilicus: | Narrow | periph margin shape: | Subangular | accessory apertures: | Intralaminal |
| spiral sutures: | Raised beaded | umb depth: | Deep | wall texture: | Finely pustulose | shell porosity: | |
| umbilical or test sutures: | Weakly depressed | final-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:
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. gsReferences:

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