CATALOG OF ORIGINAL DESCRIPTIONS: Vanhintella Georgescu 2013

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 -> V -> Vanhintella
Other pages this level: Vanhintella, Velapertina, Ventilabrella,

Vanhintella

Citation: Vanhintella Georgescu 2013
Rank: Genus
Type locality: USA ( Alabama, California, Mississippi, Texas) Mexico, North atlantic Ocean (Orphan Knoll)
Type age: Late Campanian- Maastrichtian

Current identification/main database link:


Original Description

Species included: IS: V. oligosticta (Ehrenberg 1854) (Plate 11, Figures 1–4) and FDS: V. porulosum (Ehrenberg 1854) (Plate 11, Figures 5–9).

Diagnosis: Directional lineage with very low trochospiral tests in the IS and planispiral in the FDS, chambers globular to spherical and periphery with a wide imperforate peripheral band.

Description: Test is very low trochospiral in the IS and planispiral  in  FDS;  chambers  are  globular  to  spherical  in the IS and spherical in the FDS and exhibit a gradual size increase. Sutures are distinct and depressed throughout. Test shape is asymmetrical with nearly flat spiral side in the IS and symmetrical in FDS; periphery broadly rounded with one wide imperforate band throughout the final whorl. Aperture is a low arch in extraumbilical–umbilical position in the IS and a medium high arch in equatorial position in FDS; aperture is bordered by a thin imperforate lip; relict periapertural structures often occur in the umbilical regions. Chamber surface is ornamented with dome–like or elliptical pustules (0.0027–0.0083 mm), which are more prominent on the earlier test chambers. Test wall is calcitic, hyaline, simple and perforate; pores are circular, 0.0005–0.0020mm in diameter.


Etymology: Directional lineage named after Dr J.E. van Hinte.

Extra details from original publication

Remarks: Vanhintella differs from Liuenella by having a tendency to evolve spherical chambers, having the chamber surface ornamented with pustules, which are more prominent on  the  earlier  chambers  and  smaller  pores  (0.0005–0.0020 mm  rather  than  0.0010–0.0035  mm  in  diameter).  It  differs from Allotheca mainly by having the periphery with one wide imperforate band and the chamber surface lightly ornamented. Lineage architecture shows significant differences: Vanhintella is a directional lineage, whereas Liuenella and Allotheca are iterative lineages.

References:

Georgescu, M.D., (2013). Revised evolutionary systematics of the Cretaceous planktic foraminifera described by C.G. Ehrenberg. Micropaleontology, 59: 1-48.


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Vanhintella compiled by the pforams@mikrotax project team viewed: 22-7-2018

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