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Pseudohastigerina sharkriverensis
Taxonomy
Pseudohastigerina sharkriverensis was named by Berggren et al. (1967). It is not extant.
Sister species lacking formal opinion data
Synonymy list
| Year | Name and author |
|---|---|
| 1967 | Pseudohastigerina sharkriverensis Berggren et al. p. 280 |
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If no rank is listed, the taxon is considered an unranked clade in modern classifications. Ranks may be repeated or presented in the wrong order because authors working on different parts of the classification may disagree about how to rank taxa.
†Pseudohastigerina sharkriverensis Berggren et al. 1967
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| W. A. Berggren et al. 1967 | Test planispiral, rather tightly coiled, involute, biumbilicate, compressed, subquadrate in equatorial profile; equatorial periphery moderately lobulate; axial periphery rounded. Wall smooth, finely perforate. Six, occasionally 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 chambers 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 opening, sometimes bordered by a very narrow discontinuous lip. In large adult tests the ultimate chamber becomes attached at the axial periphery, thus making the primary aperture bipartite. Greatest diameter 4.0 mm.; greatest thickness 2.4 mm. |
Measurements
No measurements are available
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| Source: o = order | |||||
| Reference: Kiessling 2004 | |||||
Collections
No collection or age range data are available