pforams@mikrotax - Globotruncanita pettersi pforams@mikrotax - Globotruncanita pettersi

Globotruncanita pettersi


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

Taxonomy

Citation: Globotruncanita pettersi (Gandolfi, 1955)
Taxonomic rank: species
Basionym: Globotruncana rosetta pettersi Gandolfi, 1955

Type images:

Original description: "Test subcircular, flat dorsally, strongly convex on the ventral side, single-keeled; the chambers increase slightly in size, are curved and overlapping, as in Globotruncana rosetta (Carsey) subsp. rosetta (Carsey) (Globigerina rosetta, 1926). They are strongly convex ventrally, flat andeven concave dorsally. The sutural elevations are thin, well defined and sharply raised. The ventral convexity of the chambers can be so strong as to give in typical specimens a trunco-conical profile (side wall nearly at right angles with the roof of the chambes)."

Entries in the Catalog of original descriptions: Globotruncana rosetta pettersi

Character matrix
test outline:Lobatechamber arrangement:Trochospiraledge view:Planoconvexaperture:Umbilical
sp chamber shape:Subtriangularcoiling axis:Very lowperiphery:Single keelaperture border:Thin porticus
umb chbr shape:Trapezoidalumbilicus:Wideperiph margin shape:Subangularaccessory apertures:Infralaminal
spiral sutures:Raised beadedumb depth:Deepwall texture:Finely pustuloseshell porosity:-
umbilical or test sutures:Raised beadedfinal-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. gansseri zone (71.73-73.80Ma, 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

Gandolfi, R. (1955). The genus Globotruncana in northeastern Colombia. Bulletins of American Paleontology. 36: 1-118. gs


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Globotruncanita pettersi compiled by the pforams@mikrotax project team viewed: 18-7-2026

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Short stable page link: https://mikrotax.org/pforams/index.php?id=110195 Go to Archive.is to create a permanent copy of this page - citation notes



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