Catapsydrax parvulus

NB TAXA WHICH ORIGINATE IN THE OLIGOCENE ARE NOT INCLUDED YET
Classification: pf_neogene -> Globigerinidae -> Catapsydrax -> Catapsydrax parvulus
Sister taxa: C. parvulus,

Taxonomy

Citation: Catapsydrax parvulus Bolli, Loeblich & Tappan, 1957
Rank: species
Basionym: Catapsydrax parvulus
Similar species: Cs. parvulus differs from Cs. unicavus, which also has a single accessory opening, in being much smaller, with less globular chambers and nearly flush sutures. [Kennett & Srinivasan 1983]

Catalog entries: Catapsydrax parvulus;

Type images:

Description


Diagnostic characters: Sub-globular, low trochospiral with umbilical bulla

Aperture: : Interiomarginal umbilical covered by an arched bulla with a single infralaminal aperture on one side [Aze 2011, based on Kennett & Srinivasan 1983]


Wall type: Spinose; Cancellate [Aze 2011]

Test morphology: Test small, subglobular, low trochospiral, chambers ovate, increasing rap- idly in size as added, usually four in the final whorl; sutures gently depressed; surface dis- tinctly cancellate with polygonal ridges sur- rounding the pore pits (PI. 2, Fig. 2); primary aperture interiomarginal, umbilical, and covered by an arched bulla with a single infralaminal accessory aperture at one side. [Kennett & Srinivasan 1983]

Biogeography and Palaeobiology


Geographic distribution: Tropical to warm subtropical. [Kennett & Srinivasan 1983]

Isotope paleobiology: Aze et al. 2011 ecogroup 4 - Open ocean sub-thermocline. Based on very light ∂13C and very heavy ∂18O. Sources cited by Aze et al. 2011 (appendix S3): Keller (1985)

Phylogenetic relations:

 


Similar species: Cs. parvulus differs from Cs. unicavus, which also has a single accessory opening, in being much smaller, with less globular chambers and nearly flush sutures. [Kennett & Srinivasan 1983]

Biostratigraphic distribution

Geological Range:
Last occurrence (top): within N15 zone (9.83-10.46Ma, top in Tortonian stage). Data source: Kennett & Srinivasan 1983
First occurrence (base): within N7 zone (16.38-17.54Ma, base in Burdigalian stage). Data source: Kennett & Srinivasan 1983

Plot of occurrence data:

Primary source for this page: Kennett & Srinivisan 1983, p.26

References:

Aze, T.; Ezard, T.H.G.; Purvis, A.; Coxall, H.K.; Stewart, D.R.M.; Wade, B.S. & Pearson, P.N.P., (2011). A phylogeny of Cenozoic macroperforate planktonic foraminifera from fossil data. Biological Reviews, 86: 900-927.

Bolli, H.M.; Loeblich, A.R., Jr. & Tappan, H., (1957). Planktonic foraminiferal families Hantkeninidae, Orbulinidae, Globorotaliidae and Globotruncanidae. In: Loeblich, A.R., Jr. et al. (Editors), Studies in Foraminifera, U.S. National Museum Bulletin 215. U.S. Government Printing Office, Washington, DC, pp. 3-50.

Keller, G., (1985). Depth stratification of planktonic foraminifers in the Miocene Ocean. In: Kennett, J.P. (Editor), The Miocene Ocean: Paleoceanography and Biogeography. GSA Memoir The Geological Society of America, Boulder, Colorado, pp. 1-337.

Kennett, J.P. & Srinivasan, M.S., (1983). Neogene Planktonic Foraminifera. Hutchinson Ross Publishing Co., Stroudsburg, Pennsylvania, 1-265 pp.


Catapsydrax parvulus compiled by the pforams@mikrotax project team viewed: 23-5-2017

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