bforams@mikrotax - Psammosphaera fusca

bforams@mikrotax - Psammosphaera fusca bforams@mikrotax - Psammosphaera fusca

Psammosphaera fusca

NB This site is under active development, current content in the main database is primarily from Bolli et al 1994, Hayward et al. 2012, Holbourn et al. 2013, Holbourn and Kaminski 1997, Alegret & Thomas 2001, and Katz et al. 2003. It is intended to expand and develop this to provide rather comprehensive coverage of Mesozoic and Cenozoic deep-sea benthic foraminifera.

Classification: bf_main -> Astrorhizida -> Psammosphaera -> Psammosphaera fusca
Sister taxa: P. fusca, P. irregularis, P. sp.

Brady 1884 pl18 figs1-8.jpg
Holbourn et al 2013 f534.jpg
Holbourn et al 2013 f535.jpg

Taxonomy

Citation: Psammosphaera fusca Schulze, 1875

Taxonomic rank: species

Basionym: Psammosphaera fusca Schulze, 1875

Synonyms:

Psammosphaera fusca Schulze. –Brady, 1884, p. 250, pl. 18, figs. 1–8. –Loeblich and Tappan, 1987, p. 28, pl. 19, figs. 2–3. –Kaminski et al., 1992, p. 255, pl. 1, figs. 16–17. –Jones, 1994, p. 31, pl. 18, figs. 1–8. [according to Holbourn et al. 2013]
Psammosphaera fusca Schulze, emend. Heron-Allen and Earland, 1913. –Kaminski and Gradstein, 2005, pp. 125–128, fig. 8, pl. 8. [according to Holbourn et al. 2013]

Taxonomic discussion: Type species of the genus Psammosphaera Schulze, 1875. Jones (1994) considered Psammosphaera parva Flint, originally distinguished on the basis of its spicular construction, to be a junior synonym of Psammosphaera fusca. Specimens may reach several millimeters in size. Specimens up to 4 mm were reported by Schulze (1875). [Holbourn et al. 2013]

Catalog entries: Psammosphaera fusca, Psammosphaera fusca

Type images:

x: P. fusca

NB These concise distinguishing features statements are used in the tables of daughter-taxa to act as quick summaries of the differences between e.g. species of one genus.
They are being edited as the site is developed and comments on them are especially welcome.

Description

Morphology:

Test is unilocular, spherical or subspherical with a subcircular cross-section. Chamber walls are agglutinated, consisting of a single layer of sand grains cemented over an inner organic lining. Agglutinated grains may be of very uneven size, and may include calcareous foraminiferal tests. The primary aperture is single, round, large, and without a lip. [Holbourn et al. 2013]

Wall composition:

agglutinated

Search data:

TEST: spherical, unilocular, APERTURE: circular, terminal,

Final whorl chambers: 1->1

The morphological data given here can be used on the advanced search page. See also these notes

Biogeography and Palaeobiology

Geographic distribution

Worldwide. See Observed Occurrences in Kaminski and Gradstein (2005).

Bathymetry remarks

Lower neritic to abyssal. Reported between 45 and 2750 fathoms at “Challenger” stations (Jones, 1994). Also common in Arctic fjords (Kaminski and Gradstein, 2005). [Holbourn et al. 2013]

Summary of depth range: lower neritic -> upper abyssal (i.e. 100 -> 3000 m)

Biostratigraphic distribution

Geological Range:
Notes: Early Cretaceous (Hauterivian?) to Recent.
Last occurrence (top): Extant. Data source: Holbourn et al. 2013
First occurrence (base): within Hauterivian Stage (126.50-132.60Ma, base in Hauterivian stage). Data source: Holbourn et al. 2013

Plot of occurrence data:
NB The ranges given for genera and higher taxa are the total ranges of species included in that taxon in this database - so the true total range of the taxon will usually be longer

Range-bar - range as quoted above, pink interval top occurs in, green interval base occurs in.
Triangles indicate an event for which a precise placement has been suggested

Psammosphaera

Primary source for this page: Holbourn et al. 2013

References:

Brady, H. B. (1884). Report on the foraminifera dredged by H.M.S. Challenger during the years 1873–1876. Report on the Scientific Results of the Voyage of H.M.S. Challenger during the years 1873-1876. 9: 1-814. gs

Heron-Allen, E. & Earland, A. (1913). On some foraminifera from the North Sea, etc., dredged by the Fisheries Cruiser “Goldseeker” (International North Sea Investigations – Scotland). II. On the distribution of Saccammina sphaerica (M. Sars) and Psammosphaera fusca (Schulze) in the North Sea: particularly with reference to the suggested identity of the two species. Journal of the Royal Microscopical Society. 1913: 1-26. gs

Holbourn, A., Henderson, A. S. & MacLeod, N. (2013). Atlas of Benthic Foraminifera. Natural History Museum, London. 1-651. gs

Jones, R. W. (1994). The Challenger Foraminifera. Oxford University Press, Oxford. 1-149. gs

Kaminski, M. A. & Gradstein, F. M. (2005). Atlas of Palaeogene cosmopolitan deep-water agglutinated foraminifera. Grzybowski Foundation Special Publication. (10): 1-547. gs

Kaminski, M. A., Gradstein, F. & Geroch, S. (1992). Uppermost Jurassic to Lower Cretaceous deep-water benthic foraminiferal assemblages from Site 765 on the Argo Abyssal Plain. Proceedings of the Ocean Drilling Program, Scientific Results. 123: 239-269. gs

Loeblich, A. R. Jr & Tappan, H. (1987). Foraminiferal Genera and their Classification. Van Nostrand Reinhold, New York. 1-970. gs

Schulze, F. E. (1875). Zoologische Ergebnisse der Nordseefart, vom 21 Juli bis 9 September 1872: I, Rhizopoden. II. . 99-114. gs

Psammosphaera fusca compiled by the bforams@mikrotax project team viewed: 10-5-2026

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