Catalog - Globigerina tecta

CATALOG OF ORIGINAL DESCRIPTIONS: Globigerina tecta Lipps 1964

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 tecta
Other pages this level: << < 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, G. tumbili> >>

Globigerina tecta

Citation: Globigerina tecta Lipps 1964
Rank: species
Type specimens: Types: Holotype (Plate I, figures 6a-c) UCLA no. 34711; 100 unfigured paratypes UCLA no. 34712. All types from sample 2 (Luisian).
Type age (chronostrat): Miocene
Type locality: Globigerina tecta is common in sample 2 (Luisian) .
Type repository: Los Angeles; University of California, , USA

Current identification:


Original Description

Test free, small, trochospiral, 2 1/2 to 3 whorls, flattened to slightly convex on both sides, umbilicus small, deep when uncovered, outline lobate, periphery rounded. Chambers inflated, increasing slightly in size with growth, circular to slightly rectangular in side view, ovate in umbilical and edge views, final chamber with elongation covering umbilicus in most specimens. Sutures distinct, radial, in narrow depression. Wall coarsely hispid. Aperture an umbilical arch of differing height, at end of extension of terminal chamber.

Size:
Greatest diameter of holotype .208 mm; greatest thickness .102 mm.

Etymology:
The specific name is from the Latin tectus meaning "cover," in reference to the modified last chamber which covers the umbilical area.

Extra details from original publication
Remarks: This new species is similar to Globigerina quinqueloba described from Recent sediments off Southern California (Natland, 1938). In the spiral view, the chambers of G. tecta are generally ovate, whereas those of G. quinqiteloba are rectangular. In general, G. tecta has more chambers (5 to 7) than G. quinqueloba (4 to 5), and the final chamber does not cover the umbilical area as completely. The spire of G. tecta is most commonly flat whereas that of G. quinqueloba varies from flat to mainly convex. These two species appear to be very closely related. Forms intermediate in age have not been described nor figured, hence inferences as to the relationship of the Miocene species to the Recent one as yet cannot be made.

Editors' Notes

References:

Lipps, J. H. (1964). Miocene planktonic foraminifera from Newport Bay, California. Tulane Studies in Geology and Paleontology. 2: 109-133. gs V O


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

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