CATALOG OF ORIGINAL DESCRIPTIONS: Globorotalia scitula praescitula Blow 1959

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 -> Globorotalia -> Globorotalia scitula praescitula
Other pages this level: << < G. pusilla mediterranica, G. pusilla pusilla, G. quadraria, G. quadrata, G. quetra, G. quinifalcata, G. redbankensis, G. reissi, G. renzi, G. rex, G. saginata, G. saheliana, G. salisburgensis, G. saphoae, G. scitula gigantea, G. scitula praescitula, G. scitula subscitula, G. scitula ventriosa, G. seigliei, G. sibaiyaensis, G. sinuososuturalis, G. spinulosa, G. strabocella, G. sturanii, G. subbotinae, G. subconica, G. suterae, G. tadjikistanensis, G. testarugosa, G. tetracamerata, G. thebaica> >>

Globorotalia scitula praescitula

Citation: Globorotalia scitula praescitula Blow 1959
Rank: sub-species
Type locality: near Pozon, eastern Falcon; Venezuela
Type sample (& lithostrat): From sample, No. RM 19152, auger line near Pozon, eastern Falcon;
Type specimens: Holotype: Plate 19, figures 128a-c, deposited in U.S.N.M. collection. No. 625713.
Type repository: Washington, USNM ;

Linked specimens: USNM-625713 USNM-625714

Current identification/main database link: Globorotalia praescitula Blow, 1959


Original Description
Test a fairly low trochospiral; spire opening regularly but not rapidly, with four to five chambers in the last whorl; equatorial profile ovate to subcircular; equatorial periphery lobate; axial periphery subacute but not keeled, although some peripheral thickening occurs on the earlier chambers; sutures of the spiral side depressed and strongly curved; sutures of the umbilical side depressed, slightly sinuous to radial; spiral side convex, umbilical side distinctly convex to rather vaulted; chambers longer than broad, elongate tangentially as seen from the spiral side; umbilicus small, sometimes closed, but often fairly deep; aperture interiomarginal, umbilical-extraumbilical, a low arch with a thin lip; wall calcareous, finely perforate, not glassy.

Size: maximum diameter of holotype, 0.30 mm.

Extra details from original publication
Remarks: This subspecies differs from Globorotalia scitula scitula (Brady) in having more tangentially elongate chambers, a more convex umbilical side, and a less finely perforate wall texture; the periphery is also generally more acute but transitional forms occur in the upper part of the Globorotalia fohsi barisanensis Zone.

Occurrence: Ranges from the base of the Pozon-El Mene Road section (Catapsydrax stainforthi Zone) to the top of the Globorotalia fohsi barisanensis Zone, Pozon formation.

References:

Blow, W. H. (1959). Age, correlation, and biostratigraphy of the upper Tocuyo (San Lorenzo) and Pozon Formations, eastern Falcon, Venezuela. Bulletins of American Paleontology. 39(178): 67-251. gs

Blow, W. H. (1969). Late middle Eocene to Recent planktonic foraminiferal biostratigraphy. In, Bronnimann, P. & Renz, H. H. (eds) Proceedings of the First International Conference on Planktonic Microfossils, Geneva, 1967. E J Brill, Leiden 380-381. gs


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Globorotalia scitula praescitula compiled by the pforams@mikrotax project team viewed: 2-3-2021

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