pforams@mikrotax - Planoglobulina acervulinoides

Planoglobulina acervulinoides

Classification: pf_mesozoic -> Heterohelicidae -> Planoglobulina -> Planoglobulina acervulinoides
Sister taxa: P. acervulinoides, P. brazoensis, P. browni, P. carseyae, P. manuelensis, P. multicamerata, P. riograndensis, P. sp.


Citation: Planoglobulina acervulinoides (Egger, 1900)
Rank: Species
Basionym: Guembelina acervulinoides
Taxonomic discussion: Neotype designated by Martin, 1972, Pl. 3, fig. 3. [copied from Chronos database]

Type images:

Original description: Test biserial in the earlier pseudotextulariid stage becoming multiserial when adult. Multiserial part of the test consists of maximum six sets of chamberlets. Chambers increasing rapidly in size as added in the earlier part of the test, the adult part presenting quasi-parallel sides in dorso-ventral view. Sutures distinct, depressed, somehow obscured in the juvenile part due to the addition of calcitic material. Test wall calcitic, macroperforate. Chamber surface ornamented with thicker and discontinuous costae, more or less parallel to the periphery. Test ornamentation distinctly coarser in the earlier part of the test. Periphery broadly to moderately rounded without peripheral structures. Multiple apertures in the adult stage, bordered by thin flanges.

Entries in the Catalog of original descriptions: Guembelina acervulinoides

Emended description:


Wall type:


Character matrix
test outline:Palmatechamber arrangement:Multiserialedge view:Compressedaperture:Multiple
sp chamber shape:Inflatedcoiling axis:N/Aperiphery:N/Aaperture border:Thin flange
umb chbr shape:Inflatedumbilicus:N/Aperiph margin shape:Moderately roundedaccessory apertures:None
spiral sutures:Strongly depressedumb depth:N/Awall texture:Coarsely costateshell porosity:Macroperforate: >2.5µm
umbilical or test sutures:Moderately depressedfinal-whorl chambers:4.0-6.0 N.B. These characters are used for advanced search. N/A - not applicable

Geological Range:
Last occurrence (top): within P. hariaensis zone (66.39-67.30Ma, top in Maastrichtian stage). Data source: [copied from Chronos database]
First occurrence (base): within Campanian Stage (72.05-83.64Ma, base in Campanian stage). Data source: [copied from Chronos database]

Plot of range and occurrence data:


Egger, J. G. (1900). Foraminiferen und Ostrakoden aus den Kreidemergeln der Oberbayerischen Alpen. Abhandlugen der königlichen bayerischen Akademie Wissenschaften zu München, mathematische - naturwisenschaftliche Klasse. 21: 3-230. gs

Georgescu, M. D. (1995). Upper Cretaceous Heterohelicidae in the Romanian Western Black Sea offshore. Revista Española de Micropaleontología. 27: 91-106. gs

Nederbragt, A. J. (1991). Late Cretaceous biostratigraphy and development of Heterohelicidae (planktic foraminifera). Micropaleontology. 37: 329-372. gs

Pessagno, E. A. (1967). Upper Cretaceous planktonic foraminifera from the western Gulf Coastal Plain. Palaeontographica Americana. 5: 245-445. gs V O


Planoglobulina acervulinoides compiled by the pforams@mikrotax project team viewed: 28-9-2022

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