pforams@mikrotax - Radotruncana subspinosa pforams@mikrotax - Radotruncana subspinosa

Radotruncana subspinosa

Classification: pf_mesozoic -> Globotruncanidae -> Radotruncana -> Radotruncana subspinosa
Sister taxa: R. calcarata, R. subspinosa, R. sp.


Citation: Radotruncana subspinosa (Pessagno, 1960)
taxonomic rank: Species
Basionym: Globotruncana (Globotruncana) subspinosa Pessagno, 1960
Taxonomic discussion: Holotype deposited in the Cole Collection, Cornell University, Ithaca, NY. [copied from Chronos database]

Type images:

Original description: "Test trochospiral coiled, biconvex to moderately convex ventrally and slightly convex dorsally. Umbilicus large, often flanked by a beaded margin. Sutures straight to slightly curved dorsally, moderately curved ventrally, usually heavily beaded. Chambers more or less angular rhombohedral in shape; 6-7 chambers in last whorl; dorsal surface of chambers sometimes crenulate. Periphery single-keeled, usually quite lobulate. Wall calcareous, finely perforate. Primary aperture interiomarginal, umbilical."

Entries in the Catalog of original descriptions: Globotruncana (Globotruncana) subspinosa

Character matrix
test outline:Lobatechamber arrangement:Trochospiraledge view:Planoconvexaperture:Umbilical
sp chamber shape:Petaloidcoiling axis:Very lowperiphery:Single keelaperture border:Coalescing portici
umb chbr shape:Inflatedumbilicus:Narrowperiph margin shape:Subangularaccessory apertures:Intralaminal
spiral sutures:Raised beadedumb depth:Deepwall texture:Finely pustuloseshell porosity:
umbilical or test sutures:Moderately depressedfinal-whorl chambers:5-6 N.B. These characters are used for advanced search. N/A - not applicable

Geological Range:
Last occurrence (top): within R. fructicosa zone (69.27-70.14Ma, 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:


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

Pessagno, E. A. (1960). Stratigraphy and micorpaleontology of the Cretaceous and lower Tertiary of Puerto Rico. Micropaleontology. 6(1): 87-110. gs


Radotruncana subspinosa compiled by the pforams@mikrotax project team viewed: 25-6-2024

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