Catalog - Globigerina rohri Catalog - Globigerina rohri

CATALOG OF ORIGINAL DESCRIPTIONS: Globigerina rohri 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 -> Globigerina -> Globigerina rohri
Other pages this level: << < G. pyriporosa, G. quadrata, G. quadricamerata, G. quadrilatera, G. quadrilobata, G. quadritriloculinoides, G. quinqueloba, G. quinqueloba egelida, G. radians, G. regina, G. regularis, G. reticulata, G. ridenda, G. riveroae, G. roblesae, G. rohri, G. rosacea, G. rosetta, G. rotundaenana, G. rotundata, G. rotundata jacksonensis, G. rubescens, G. rubra, G. rudis, G. rugosa, G. rustica, G. sabina, G. sacculifera, G. sakitoensis, G. sallentina, G. santamariaensis> >>

Globigerina rohri

Citation: Globigerina rohri Bolli 1957
Rank: Species
Type specimens: Holotype (USNM P5611) and figured paratypes (USNM P5612a-c) from the type section of the Globorotalia opima opima zone, Trinidad, sample JS 20 (TTOC 193265).
Type locality: Stratigraphic range (in Cipero formation) : Globigerina ampliapertura zone to Catapsydrax dissimilis zone.
Type repository: Washington; USNM

Linked specimens: USNM-5612 USNM-5612 USNM-5611 USNM-5612

Current identification/main database link: Dentoglobigerina tripartita (Koch 1926)


Original Description

Shape of test trochospiral; equatorial periphery slightly lobate; because of the lateral compression of the chambers, the test has a somewhat spherical appearance. Wall calcareous, perforate, surface finely pitted. Chambers spherical, those of last whorl laterally compressed; about 12, arranged in about 2½ whorls; the 3 or occasionally 4 chambers of the last whorl increase very rapidly in size; in large specimens the final chamber is commonly reduced in size. Sutures on spiral side curved in early stage, radial or oblique later, depressed; on umbilical side radial, depressed. Umbilicus small, deep; rugosities or short thick spines are found around the umbilical edge. Aperture arched; interiomarginal, umbilical; because of the almost closed umbilicus not well visible. Coiling random.

Size:
Largest diameter of holotype 0.73 mm.

Etymology:
The species is named for Dr. K. Rohr in recognition of his geological work in Trinidad.

Extra details from original publication
Synonymy: Globigerina venezuelana Hedberg, Beckmann, Eclog. Geol. Helvetiae, vol. 46, No. 2, p. 392, pi. 10, figs. 12-13, 1953.

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

Remarks: Globigerina rohri, new species, is distinguished from G. venezuelana Hedberg by having usually 3 instead of 4 chambers in the last whorl, by the rugosities or short spines around the umbihcal edge and by having the chambers of the last whorl laterally more compressed.

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

Wade, B. S., Pearson, P. N., Olsson, R. K., Fraass, A. J., Leckie, R. M. & Hemleben, C. (2018c). Taxonomy, biostratigraphy, and phylogeny of Oligocene and Lower Miocene Dentoglobigerina and Globoquadrina. 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 11): 331-384. gs

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Globigerina rohri compiled by the pforams@mikrotax project team viewed: 5-6-2023

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