pforams@mikrotax - Rugoglobigerina pennyi pforams@mikrotax - Rugoglobigerina pennyi

Rugoglobigerina pennyi

Classification: pf_mesozoic -> Rugoglobigerinidae -> Rugoglobigerina -> Rugoglobigerina pennyi
Sister taxa: R. hexacamerata, R. macrocephala, R. milamensis, R. pennyi, R. rugosa, R. spinosa, R. sp.


Citation: Rugoglobigerina pennyi Bronnimann, 1952
taxonomic rank: Species
Basionym: Rugoglobigerina rugosa pennyi

Type images:

Original description: The test is of intermediate size.The chambers are arranged in a low trochoidal spire of about 2 whorls. The spiral side is slightly depressed. The las volution comprises 6-7 chambers which do not, or only very slowly, increase in size. The chambers are truncate on the apertural side and rounded peripherally. The subcircular umbilicus is large and deep, and covered with a frail plate, usually preserved only in fragments along the apertural edges. The large, arcuate apertures open into the umbilicus and seem to be provided with minute lip-like borders. The surface shows strong rugosities which in the last volution are arranged in the meridional pattern.

Entries in the Catalog of original descriptions: Rugoglobigerina rugosa pennyi

Character matrix
test outline:Subcircularchamber arrangement:Trochospiraledge view:Spiroconvexaperture:Umbilical
sp chamber shape:Inflatedcoiling axis:Lowperiphery:N/Aaperture border:Thin lip
umb chbr shape:Inflatedumbilicus:Wideperiph margin shape:Broadly roundedaccessory apertures:Umbilical
spiral sutures:Moderately depressedumb depth:Deepwall texture:Meridional costellaeshell porosity:Finely Perforate: 1-2.5µm
umbilical or test sutures:Moderately depressedfinal-whorl chambers:6-7 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:


Brönnimann, P. (1952c). Globigerinidae from the Upper Cretaceous (Cenomanian-Maestrichtian) of Trinidad, B. W. I. Bulletins of American Paleontology. 34(140): 1-70. gs

Smith, C. C. & Pessagno, E. A. (1973). Planktonic foraminifera and stratigraphy of the Corsicana formation (Maestrichtian) North-central Texas. Cushman Foundation for Foraminiferal Research, Special Publication. 12: 1-67. gs O


Rugoglobigerina pennyi compiled by the pforams@mikrotax project team viewed: 26-5-2024

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Comments (2)



No brackets. Genus unchanged.



Jeremy Young(UK)

corrected - thanks! Jeremy