Catalog - Globotruncanella citae hispida Catalog - Globotruncanella citae hispida

CATALOG OF ORIGINAL DESCRIPTIONS: Globotruncanella citae hispida Korchagin&Pletnev 2011, in Korchagin et al. 2011

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 -> Globotruncanella -> Globotruncanella citae hispida
Other pages this level: G. citae hispida, G. kefennsoura, G. minuta, G. piramidalis

Globotruncanella citae hispida

Citation: Globotruncanella citae hispida Korchagin&Pletnev 2011, in Korchagin et al. 2011
Taxonomic rank: sub-species
Type specimens: Plate II, figs. 7a–7c; Collection GIN RAN, no. 4911/1
Type sample (& lithostrat): Sample 08D43
Type age (chronostrat): upper Campanian–lower Maastrichtian
Type locality: Magellan Seamounts (Govorov Guyot), western Pacific
Type repository: Moscow; Geological Institute, Russian Academy of Sciences

Current identification:


Original Description

Test is medium-sized, low-trochoid, lenticular, flattened–biconvex, with two and half spiral whorls. Test contour is lobate, rounded. The last whorl contains 5.5–6.0 chambers; on the spiral side, chambers are flattened-spheroid, medium-spiny, separated by depressed straight radial septal sutures; on the umbilical side, chambers are flattened, with highly and irregular spine surface. Spines are chaotically oriented. Chambers are separated by straight depressed septal sutures. Periphery is wedge-shaped, with small keel formed by a single row of spines and tubercles. The umbilical area is wide, shallow with aperture covered by poorly preserved tegilla.

Size:
Holotype is 0.4 mm in diameter and 0.17 mm thick

Etymology:
from the Latin hispidus (spiny).

Extra details from original publication
Comparison. By the shape of its test, this subspecies is similar to Globotruncanella citae citae (Bolli) differing from the latter in larger spines on the chamber surface on both the spiral and umbilical sides, larger number of chambers (six versus five) in the last whorl, development of the keel at the chamber periphery, and in larger sizes of the test.

Material. Several moderately preserved specimens.

Distribution and age. The species is first described from upper Campanian ⎯ lower Maastrichtian sediments of one of the guyots in the Magellan Seamounts of the western Pacific.

References:

Korchagin, O. A., Pletnev, S. P. & Mel’nikov, M. E. (2011). Upper Campanian-lower Maastrichtian planktonic foraminifers from Govorov Guyot (Magellan Seamounts, Pacific Ocean). Stratigraphy and Geological Correlation. 19: 289-295. gs


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Globotruncanella citae hispida compiled by the pforams@mikrotax project team viewed: 29-4-2025

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