Catalog - Chiloguembelina parallela

CATALOG OF ORIGINAL DESCRIPTIONS: Chiloguembelina parallela Beckmann 1957

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 -> C -> Chiloguembelina -> Chiloguembelina parallela
Other pages this level: C. adriatica, C. andreae, C. circumlabiata, C. fusiformis, C. midwayensis strombiformis, C. midwayensis subcylindrica, C. minutissima, C. noguerensis, C. orientalis, C. parallela, C. praecursor, C. subtriangularis, C. subwilcoxensis, C. taurica, C. ujliaensis, C. victoriana, C. vineetae, C. waiparaensis, C. woodi

Chiloguembelina parallela

Citation: Chiloguembelina parallela Beckmann 1957
Rank: Species
Type specimens: Figured holotype (USNM P5780) and paratypes (USNM P5781a-c), unfigured paratypes (USNM P5782).
Type age (chronostrat): Eocene
Type locality: Holotype from the lower Eocene, upper Lizard Springs formation, Globorotalia rex zone, left bank tributary of Cascas River, 180 feet from its junction with the Cascas River, Moruga, south Trinidad (coordinates N:138700 links, E:435000 links), collected by L. W. Hawkins (No. 1831) (TTOC 228484).
Type repository: Washington; USNM

Linked specimens: USNM-5781 USNM-5781 USNM-5781 USNM-5780

Current identification/main database link: Chiloguembelina parallela Beckmann 1957


Original Description

Test short, thick, rapidly tapering towards the base, slightly compressed. Chambers subglobular, usually 8 to 12 in number, biserially arranged, rapidly increasing in size. Sutures oblique, depressed. Wall smooth or slightly spinose. Aperture high and narrow, symmetrical, bordered by 2 parallel lateral flanges, occasionally covered by a small end of irregular shape.

Size:
Length: 0.22-0.42 mm.; holotype 0.4 mm.

Etymology:

Extra details from original publication
This species is easily separated from other species of Chiloguembelina by its symmetrical, high and narrow aperture. Its restricted range makes it a good index fossil. The holotype is a large specimen, hence a few smaller paratypes are illustrated in the text-figure in
order to give the full size range of the species.

Editors' Notes

References:

Beckmann, J. P. (1957). Chiloguembelina Loeblich and Tappan and related foraminifera from the Lower Tertiay of Trinidad, B.W.I. In, Loeblich, A. R. , Jr., Tappan, H., Beckmann, J. P., Bolli, H. M., Montanaro Gallitelli & E. Troelsen, J. C. (eds) Studies in Foraminifera. U.S. National Museum Bulletin . 215: 83-95. gs V O

Huber, B. T., Olsson, R. K. & Pearson, P. N. (2006). Taxonomy, biostratigraphy, and phylogeny of Eocene microperforate planktonic foraminifera (Jenkinsina, Cassigerinelloita, Chiloguembelina, Streptochilus, Zeauvigerina, Tenuitella, and Cassigerinella) and Problematica (Dipsidripella). In, Pearson, P. N., Olsson, R. K., Hemleben, C., Huber, B. T. & Berggren, W. A. (eds) Atlas of Eocene Planktonic Foraminifera. Cushman Foundation for Foraminiferal Research, Special Publication . 41(Chap 16): 461-508. gs V O


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Chiloguembelina parallela compiled by the pforams@mikrotax project team viewed: 30-11-2022

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