Catalog - Globigerina stonei

CATALOG OF ORIGINAL DESCRIPTIONS: Globigerina stonei Weiss 1955

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 stonei
Other pages this level: << < G. scobinata, G. seminolensis, G. seminulina, G. semivera, G. siakensis, G. simulans, G. siphonifera, G. soldadoensis, G. soldadoensis angulosa, G. spinuloinflata, G. spiralis, G. spirata, 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> >>

Globigerina stonei

Citation: Globigerina stonei Weiss 1955
Rank: species
Type specimens: Plate 5, figures 16-21
Type sample (& lithostrat): Holotype from I. P. Co. well 3297, core depth 1561-1579 feet.
Type age (chronostrat): Paleocene
Type locality: northwestern Peru
Type repository: New York, AMNH

Current identification/main database link: Acarinina nitida (Martin 1943)


Original Description

Test small, consisting of about two whorls, dorsal side flattened, ventral convex with a large, open umbilicus, periphery rounded and lobulate; four chambers in the last whorl, enlarging gradually as added, sub-globular, with a slight ventral taper; sutures depressed, distinct; wall conspicuously perforate and covered with fine papillae; aperture an arched slit at the base of the last septal face, extending from the open umbilicus toward the periphery, often with a slight lip.

Size:
Greatest diameter of holotype 0.25 mm.

Etymology:

Extra details from original publication
Cushman and Stone's well-figured specimen was reported from the Chacra formation of the La Brea-Pariias property, where it is sometimes larger than the Pale Greda holotype. However, G. pseudobulloides Plummer is composed of five and sometimes six highly ventricose chambers and does not agree closely with the Pale Greda or Chacra forms. There are also more compressed variants of G. stonei present in both the Chacra and Pale Greda formations. These range through all intermediate stages toward the end form which differs from the typical G. stonei in its more tightly coiled globorotalid test with three and one-half to four more appressed chambers, a less lobulate periphery, and a smaller umbilicus.

Both end types and all transitional forms of G. stonei are fairly common throughout the Pale Greda formation.

Editors' Notes
Weiss published two papers in 1955 on the same material, in Micropaleontology and Journal of Paleontology. The details on the planktonic foraminifera are given in the paper in Micropaeontology but the original descriptions are in the paper in Journal of Paleontology.

References:

Weiss, L. (1955a). Foraminifera from the Paleocene Pale Greda Formation of Peru. Journal of Paleontology. 29(1): 1-21. gs

Weiss, L. (1955b). Planktonic index foraminifera of northwestern Peru. Micropaleontology. 1: 301-319. gs


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Globigerina stonei compiled by the pforams@mikrotax project team viewed: 27-11-2022

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Short stable page link: https://mikrotax.org/pforams/index.php?id=130683 Go to Archive.is to create a permanent copy of this page - citation notes



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