CATALOG OF ORIGINAL DESCRIPTIONS: Globigerinoides triloba subsp. altiapertura Bolli 1957

This page provides data from the catalog of type descriptions. The catalog is sorted alphabetically. Use the current identification link to go back to the main database.


Higher levels: pf_cat -> G -> Globigerinoides -> Globigerinoides triloba altiapertura
Other pages this level: << < G. sacculiferus immatura, G. sacculiferus irregularis, G. semiinvoluta, G. semiinvolutus, G. sicanus, G. sicanus praesicanus, G. subconglobatus micra, G. subconglobatus subconglobata, G. subquadrata, G. subquadratus praesubquadratus, G. subquadratus subelongatus, G. suleki, G. tapiesi, G. tenella, G. transitoria, G. triloba altiapertura, G. triloba aspera, G. trilobus bullatus, G. tyrrhenicus

Globigerinoides triloba altiapertura

Citation: Globigerinoides triloba subsp. altiapertura Bolli 1957
Rank: sub-species
Type locality: Type locality of the Catapsydrax dissimilis zone, Trinidad, sample Bo 267 (TTOC 201216).
Type age (chronostrat): Catapsydrax dissimilis zone
Type specimens: Holotype P5632; figured paratype P5633.
Type repository: Washington; USNM

Linked specimens: USNM-5632 USNM-5633

Current identification/main database link: Globigerinoides altiaperturus Bolli, 1957


Original Description
Shape of test trochospiral; equatorial periphery distinctly lobate (trilobate) ; axial periphery rounded. Wall calcareous, perforate, surface finely pitted. Chambers spherical; about 12, arranged in about 2½ whorls; the 3 chambers of the last whorl increase rapidly in size. Sutures on spiral side between early chambers radial, later slightly curved and oblique, depressed; on umbilical side: radial, depressed. Umbilicus fairly narrow, deep. Primary aperture, a high, distinct arch, interiomarginal, umbilical; the last few chambers show one supplementary sutural aperture about opposite the primary aperture. Coiling random.

Size: Largest diameter of holotype 0.55 mm.

Extra details from original publication
Remarks: Globigerinoides triloba altiapertura, new subspecies, is distinguished from G. triloba immatura Le Roy by having a larger, higher arched, primary aperture.

Stratigraphic range (in Cipero formation) : Catapsydrax dissimilis zone to Catapsydrax stainforthi zone.

References:

Bolli, H. M. (1957b). Planktonic foraminifera from the Oligocene-Miocene Cipero and Lengua formations of Trinidad, B.W.I. In, Loeblich, A. R. , Jr., Tappan, H., Beckmann, J. P., Bolli, H. M., Montanaro Gallitelli & E. Troelsen, J. C. (eds) Studies in Foraminifera. U.S. National Museum Bulletin. 215: 97-123. gs V O

Spezzaferri, S., Olsson, R. K. & Hemleben, C. (2018c). Taxonomy, biostratigraphy, and phylogeny of Oligocene to Lower Miocene Globigerinoides and Trilobatus. In, Wade, B. S., Olsson, R. K., Pearson, P. N., Huber, B. T. & Berggren, W. A. (eds) Atlas of Oligocene Planktonic Foraminifera. Cushman Foundation for Foraminiferal Research, Special Publication. 46(Chap 9): 269-306. gs V O

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Globigerinoides triloba altiapertura compiled by the pforams@mikrotax project team viewed: 7-3-2021

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