Bolli1957 pl38-03.JPG
Eocene_Atlas_pl12-4_fig5-7.jpg
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.
Bolli1957 pl38-03.JPG
Eocene_Atlas_pl12-4_fig5-7.jpgLinked specimens: USNM-5741
Current identification:
Original Description
Shape of test very low trochospiral; equatorial periphery almost circular, only very slightly lobate; axial periphery angular with a thin keel. Wall calcareous, finely perforate, surface smooth or very finely pitted. Chambers very strongly compressed; 15 to 18, arranged in about 2 1/2 whorls; the chambers of the last whorl, usually 6 in number, increase fairly rapidly in size. Sutures on the spiral side curved; on the umbilical side radial or very slightly curved, slightly depressed between the last chambers. Umbilicus very narrow, shallow. Aperture a low arch, often with a distinct lip, interiomarginal, umbilical-extraumbilical. Coiling almost 100% dextral throughout the observed range in the Navet formation.
Size: Largest diameter of holotype 0.23 mm
Etymology: The species is named for Dr. H. H. Renz of the Mene Grande Oil Company, in recognition of his contributions to micropaleontology in the Caribbean region.
Extra details from original publication
Stratigraphic range: Hantkenina aragonensis zone to Truncorotaloides rohri zone, Navet formation.
Remarks: Glohorotalia renzi Bolli, new species, is distinguished from G. lehneri Cushman and Jarvis by its small size and spineless periphery. It usually has 6 chambers in the last whorl compared with 4-5 in small specimens of G. lehneri.
Editors' Notes
original combination not double checked
Berggren, W. A., Olsson, R. K. & Premoli Silva, I. (2006a). Taxonomy, biostratigraphy and phylogenetic affinities of Eocene Astrorotalia, Igorina, Planorotalites, and Problematica (Praemurica? lozanoi). 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 12): 377-400. gs V O Bolli, H. M. (1957a). Planktonic foraminifera from the Eocene Navet and San Fernando formations 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: 155-172. gs V O Bolli, H. M., Loeblich, A. R. & Tappan, H. (1957). Planktonic foraminiferal families Hantkeninidae, Orbulinidae, Globorotaliidae and Globotruncanidae. 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: 3-50. gs V OReferences:
 |
Globorotalia renzi compiled by the pforams@mikrotax project team viewed: 19-4-2021
Short stable page link: https://mikrotax.org/pforams/index.php?id=131271 Go to Archive.is to create a permanent copy of this page - citation notes |