CATALOG OF ORIGINAL DESCRIPTIONS: Pseudohastigerina sharkriverensis Berggren & Olsson, in Berggren et al.  1967

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 -> P -> Pseudohastigerina -> Pseudohastigerina sharkriverensis
Other pages this level: P. acutimarginata, P. barbadoensis, P. globulosa, P. pellucida, P. quadrata, P. sharkriverensis, P. sphaeroidalis,

Pseudohastigerina sharkriverensis

Citation: Pseudohastigerina sharkriverensis Berggren & Olsson, in Berggren et al.  1967
Rank: Species
Holotype Repository: Washington; USNM
Type & figured specimens: 509801

Linked specimens: USNM-509801 USNM-509802

Current identification/main database link: Pseudohastigerina sharkriverensis Berggren and Olsson 1967


Original Description
"Test planispiral, rather tightly coiled, involute, biumbilicate, compressed, subquadrate in equatorial profile; equatorial periphery moderately lobulate; axial periphery rounded. Wall smooth, finely perforate. Six, ocassionally 5, chambers in the ultimate whorl; early chambers increasing evenly in size; last 2 or 3 chambers greatly enlarged in size over the earlier ones; chambers inflated, subspherical to ovoid in shape, moderately embracing; last two generally make up half the test size. Sutures radial, moderately depressed. Test biumbilicate, umbilici small and shallow. Aperture interiomarginal, equatorial, symmetrical, consisting of a low narrow discontinuous lip. In large adult test the ultimate chamber becomes attached at the axial periphery, thus making the primary aperture bipartite. Greatest diameter 0.40 mm.; greatest thickness 0.24 mm.

References:

Berggren, W. A., Olsson, R. K. & Reyment, R. A. (1967). Origin and development of the foraminiferal genus Pseudohastigerina Banner and Blow, 1959. Micropaleontology. 13(3): 265-288. gs

Olsson, R. K. & Hemleben, C. (2006). Taxonomy, biostratigraphy, and phylogeny of Eocene Globanomalina, Planoglobanomalina n. gen and Pseudohastigerina. 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 14): 413-432. gs


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Pseudohastigerina sharkriverensis compiled by the pforams@mikrotax project team viewed: 28-2-2020

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