Catalog - Globigerina velascoensis compressa Catalog - Globigerina velascoensis compressa

CATALOG OF ORIGINAL DESCRIPTIONS: Globigerina velascoensis var. compressa White 1928

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 -> Globigerina -> Globigerina velascoensis compressa
Other pages this level: << < G. tripartita tapuriensis, G. trivialis, G. tschikryzovi, G. tumbili, G. turbulenta, G. turcmenica, G. turritilina praeturritilina, G. turritilina turritilina, G. tuschepsensis, G. umbilicata, G. umbrica, G. uruchaensis, G. utilisindex, G. varianta, G. velascoensis, G. velascoensis compressa, G. venezuelana, G. vignalii, G. voluta, G. wagneri, G. washitensis, G. weissi, G. wilsoni, G. wilsoni bolivariana, G. winkleri, G. woodi, G. woodi connecta, G. woodi extrema, G. yeguaensis, G. yeguaensis pseudovenezuelana, G. zealandica> >>

Globigerina velascoensis compressa

Citation: Globigerina velascoensis var. compressa White 1928
taxonomic rank: variety
Type specimens: 19882
Type sample (& lithostrat): Velasco Fm
Type age (chronostrat): Paleocene
Type locality: locality No. 23, Tampico Bay, Mexico
Type repository: New York; AMNH Columbia University Paleo. Coll. No. 19882,

Current identification/main database link: Subbotina velascoensis (Cushman 1925)


Original Description

This species differs from the preceding in the greater degree of compression, resulting in deeper sutures, very much flatter later chambers in which the last is often smaller than its predecessor; aperture generally lengthened so that it forms a long slit-like opening, extending practically the whole length of the last chamber and opening into the umbilicus.

Size:
Length of type specimen, 0.47 mm.; width, 0.4 mm

Extra details from original publication
Occurrence. This variety of the species appears higher up in the Velasco, becoming somewhat more common, but still rare, near the upper limit of the Velasco as treated here. The variety, being a sort of degenerate form, is much less regular in its character.

Editors' Notes
New name Globorotalia tortiva proposed for this taxon by Bolli 1957, since compressa was a junior homonym

References:

Bolli, H. M. (1957d). The genera Globigerina and Globorotalia in the Paleocene-Lower Eocene Lizard Springs Formation of Trinidad. 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: 61-82. gs

White, M. P. (1928). Some Index Foraminifera of the Tampico Embayment Area of Mexico. Journal of Paleontology. 2(3): 177-215. gs


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Globigerina velascoensis compressa compiled by the pforams@mikrotax project team viewed: 26-5-2024

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