Catapsydrax globiformis


Classification: pf_cenozoic -> spinose -> Globigerinidae -> Catapsydrax -> Catapsydrax globiformis
Sister taxa: C. africanus, C. dissimilis, C. globiformis, C. howei, C. unicavus,

Taxonomy

Citation: Catapsydrax globiformis Blow and Banner 1962
Rank: Species
Basionym: Globigerinita globiformis
Synonyms:
Taxonomic discussion: [Olsson et al. 2006]

Catalog entries: Globigerinita globiformis;

Type images:

NB The short diagnoses are used in the tables of daughter-taxa to act as quick summaries of the differences between e.g. species of one genus. They have initially been copied from the diagnostic characters/distinguishing features sections of the Eocene and Paleocene Atlases, they will be edited as the site is developed.

Description


Wall type: Cancellate, probably spinose, ruber/sacculifer-type wall texture. [Olsson et al. 2006]

Test morphology: Low trochospiral, nearly spherical test with 3-4 chambers in the final whorl. Chambers inflated, globular, increasing rapidly in size with a large bulla that covers the umbilicus and half of the surrounding chambers, walls thickened by gametogenetic calcification; in spiral view 3½ -4 globular, embracing chambers increasing rapidly in size, sutures straight, slightly depressed; in umbilical view dominated by a large, low bulla with 3-4 small, semicircular, infralaminal apertures with a continuous, thickened imperforate rim opening onto each suture which is straight and slightly depressed; in edge view nearly circular in shape with large, slightly inflated bulla showing one small aperture opening onto the suture line. [Olsson et al. 2006]

Size: Holotype maximum diameter 0.23 mm, thickness 0.20 mm. [Olsson et al. 2006]

Character matrix

test outline:Circularcoiling axis:Lowchamber arrangement:Trochospiralumbilicus:Narrow
edge view:Equally biconvexumbilical or test sutures:Moderately depressedspiral sutures:Moderately depressedshell porosity:Finely Perforate: 1-2.5
wall texture:Cancellateaperture:Umbilicalaperture border:N/Aaccessory apertures:Infralaminal
periphery:N/Aumb chamber shape:Globularsp chbr shape:Globularperiph margin shape:Broadly rounded
umb depth:Deepdiameter mm:0.23width mm:breadth mm:0.2
final-whorl chambers:3.0-4.0

Biogeography and Palaeobiology


Geographic distribution: [Olsson et al. 2006]
Aze et al. 2011 summary: Low to middle latitudes; based on Olsson et al. (2006c)

Isotope paleobiology: [Olsson et al. 2006]
Aze et al. 2011 ecogroup 4 - Open ocean sub-thermocline. Based on very light δ13C and very heavy δ18O. Sources cited by Aze et al. 2011 (appendix S3): Keller (1985)

Phylogenetic relations: [Olsson et al. 2006]

Biostratigraphic distribution

Geological Range:
Last occurrence (top): within E15 zone (34.68-35.89Ma, top in Priabonian stage). Data source: Eocene Atlas
First occurrence (base): within E12 zone (39.97-40.40Ma, base in Bartonian stage). Data source: Eocene Atlas

Plot of occurrence data:

Primary source for this page: Olsson et al. 2006 - Atlas of Eocene Planktonic Foraminifera, chapter 5, p. 71

References:

Blow, W.H. & Banner, F.T., (1962). The mid-Tertiary (Upper Eocene to Aquitanian) Globigerinaceae. In: Eames, F.E. et al. (Editors), Fundamentals of mid-Tertiary Stratigraphical Correlation. Cambridge University Press, Cambridge, pp. 61-151.

Fleisher, R.L., (1974). Cenozoic planktonic foraminifera and biostratigraphy, Arabian Sea, Deep Sea Drilling Project, Leg 23A. Initial Reports of the Deep Sea Drilling Project, 23: 1001-1072.

Olsson, R.K.; Pearson, P.N. & Huber, B.T., (2006). Taxonomy, biostratigraphy, and phylogeny of Eocene Catapsydrax, Globorotaloides, Guembelitrioides, Paragloborotalia, Parasubbotina, and Pseudoglobigerinella n. gen. In: Pearson, P.N. et al. (Editors), Atlas of Eocene Planktonic Foraminifera, Cushman Foundation Special Publication 41. Cushman Foundation Special Publication. Allen Press, Lawrence, Kansas, pp. 67-110.

Warraich, M.Y. & Ogasawara, K., (2001). Tethyan Paleocene-Eocene planktic foraminifera from the Rakhi Nala and Zinda Pir land sections of the Sulaiman Range, Pakistan. Science Reports of the Institute of Geosciences, University of Tsukuba, Section B = Geological Sciences, 22: 1-59.


Catapsydrax globiformis compiled by the pforams@mikrotax project team viewed: 26-6-2017

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