Catalog - Globigerina taroubaensis <title>Catalog - Globigerina taroubaensis

CATALOG OF ORIGINAL DESCRIPTIONS: Globigerina taroubaensis Bronnimann 1952

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 taroubaensis
Other pages this level: << < G. stainforthi, G. stainforthi Hofker, G. steiningeri, G. stonei, G. subcorpulenta, G. subcretacea, G. subcretacea Chapman, G. subdigitata, G. subsphaerica, G. subtarchanensis, G. subtriloculinoides, G. supracretacea, G. taminensis, G. tarchanensis, G. tardita, G. taroubaensis, G. tecta, G. terquemi, G. tetracamerata, G. topilensis, G. triangularis, G. tricamerata, G. trigonula, G. triloba, G. trilocularis, G. triloculinoides, G. triloculinoides nanus, G. triloculinoides parva, G. tripartita tapuriensis, G. trivialis, G. tschikryzovi> >>

Globigerina taroubaensis

Citation: Globigerina taroubaensis Bronnimann 1952
Rank: Species
Type specimens: USNM No:370087 Holotype:Rz.413;T.L.L.Cat.No.59892
Type sample (& lithostrat): Upper zone of Lizard Springs formation,rare to common;Ramdat marl, common.
Type age (chronostrat): Eocene
Type locality: Ramdat marl,lower Eocene,near San Fernando,south Trinidad.BWI
Type repository: Washington; USNM

Linked specimens: USNM-370087

Current identification:


Original Description

"The relatively small subglobular test is characterized by an accessory chamber across the umbilicus. The trochoid spiral of about two volutions contains four chambers in the last whorl. The apressed subglobular and peripherally somewhat flattened chambers increase rapidly in size. The radial sutures are shallow and indistinct troughout. The small umbilicus is almost completely covered by the accessory chamber, the aperture of which is very small. Apertures of earlier chambers are not visible. The walls are coarsely perforate. The surface, including that of the accessory chamber, is roughly pitted. The species is coiled in both directions. Holotype: Coiling dextral; maximum diameter 0.25 mm.

Size:
Holotype: Coiling: dextral. Dimensions: maximum diameter ,0.25mm.

Etymology:
The species is named after the Tarouba River near San Fernando, Trinidad.

Extra details from original publication
RemarksG.taroubaensis Bronnimann,n.sp.differs by the small subglobular test with roughly pitted surface and by the relatively large accessory chamber across the umbilicus from all other nonspinose Globigerinae described in this paper. It can easily be distinguished from the lobulate and highly trochoid G.turgida which also carries an accessory chamber. The maximum diameter ranges from 0.22mm.to 0.28mm., average about 0.25mm. Six out of 12 specimens are coiled to the right.

Occurrence: Upper zone of Lizard Springs formation, rare to common; Ramdat marl, common.

Editors' Notes

References:

Bolli, H. M. (1957d). The genera Globigerina and Globorotalia in the Paleocene-Lower Eocene Lizard Springs Formation of Trinidad. 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: 61-82. gs V O

Brönnimann, P. (1952d). Trinidad Paleocene and lower Eocene Globigerinidae. Bulletins of American Paleontology. 34(143): 1-34. gs

Olsson, R. K., Pearson, P. N. & Huber, B. T. (2006c). Taxonomy, biostratigraphy, and phylogeny of Eocene Catapsydrax, Globorotaloides, Guembelitrioides, Paragloborotalia, Parasubbotina, and Pseudoglobigerinella n. gen. In, Pearson, P. N., Olsson, R. K., Hemleben, C., Huber, B. T. & Berggren, W. A. (eds) Atlas of Eocene Planktonic Foraminifera. Cushman Foundation for Foraminiferal Research, Special Publication . 41(Chap 5): 67-110. gs V O


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Globigerina taroubaensis compiled by the pforams@mikrotax project team viewed: 28-1-2023

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