Catalog - Globigerinella alexi Catalog - Globigerinella alexi

CATALOG OF ORIGINAL DESCRIPTIONS: Globigerinella alexi Haque 1956

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 -> Globigerinella -> Globigerinella alexi
Other pages this level: G. aberranta, G. aissana, G. alexi, G. biforaminata, G. cushmani, G. duboisi, G. escheri clavata, G. evoluta, G. evoluta evoluta, G. gottisi, G. japonica, G. liverovskae, G. megaperta, G. messinae messinae, G. messinae subcarinata, G. naguewichiensis, G. praemicra, G. pseudovoluta, G. roeglina, G. subangulata, G. tururensis, G. ultramicra, G. voluta pinguis

Globigerinella alexi

Citation: Globigerinella alexi Haque 1956
taxonomic rank: Species
Type locality: A measured section in Nammal Gorge, Salt Range , western Pakistan.
Type repository: Quetta, Pakistan; Geological Survey

Current identification/main database link: Pseudoglobigerinella bolivariana (Petters 1954)


Original Description

"Test free, longer than broad, slightly umbilicate, involute, planispirally coiled, early part probably trochoid. Periphery broadly rounded, somewhat apressed, four or five in the outer whorl, rapidly increasing in size as added. Sutures distinct, depressed, radial. Surface coarsely cancellated. Wall calcareous, rather coarsely perforate, radial, byaline. Aperture peripheral at the base of the last chamber, usually obscured. Length up to 0.6 mm.; breadth 0.4 mm.; thickness 0.4 mm.

Extra details from original publication
Remarks. - In some of the specimens, the last chamber is somewhat smooth. Differences. - This species has a resemblance to Globigerina hastata Egger, from the Recent seas, but the latter is more tightly coiled, the chambers more closely appressed, and in the former the chambers increase more rapidly in size. From Globigerinella hirsuta d'Orbignyli this species is differentiated by the lack of a well-developed umbilicus, in the more compact test with more closely appressed chambers and in the coarsely cancellated surface. Globigerinella voluta (White) has a smooth test, less appressed, a greater number of chambers, and well-developed umbilici.

References:

Haque, A. F. M. M. (1956). The smaller foraminifera of the Ranikot and the Laki of the Nammal gorge, Salt Range. Memoir of the Pakistan Geological Survey. 1: 1-300. gs


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Globigerinella alexi compiled by the pforams@mikrotax project team viewed: 22-2-2024

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