Catapsydrax unicavus


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

Taxonomy

Citation: Catapsydrax unicavus Bolli, Loeblich and Tappan 1957
Rank: Species
Basionym: Catapsydrax unicavus
Synonyms:
Taxonomic discussion: The loosely coiled test with large circular, infralaminal apertures of Catapsydrax howei somewhat resembles Recent Globigerinoides, suggesting a shallow habitat in the water column. We illustrate the holotype in SEM for the first time (Pl.5.2, Figs. 9-12) along with newly collected specimens from the type locality (Pl.5.2, Figs. 13-16). Catapsydrax golicynensis Menkes from the upper Eocene of the Black Sea exhibits the large arched aperture of this species and is a probable synonym. The specimen figured by Warraich and Ogasawara (2001) is a five-chambered form that does not match the morphology of C. howei. [Olsson et al. 2006]

Catalog entries: Catapsydrax unicavus;
Globigerina isahayensis;
Globigerina linaperta turgida;

Type images:

Short diagnosis: Catapsydrax howei is distinguished from C. africanus by its larger, more loosely coiled test, large globular bulla with large, circular, infralaminal apertures. Catapsydrax globiformis is smaller, has a spherical-shaped test with a low slightly inflated bulla with small circular, infralaminal apertures.

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


Diagnostic characters: Catapsydrax howei is distinguished from C. africanus by its larger, more loosely coiled test, large globular bulla with large, circular, infralaminal apertures. Catapsydrax globiformis is smaller, has a spherical-shaped test with a low slightly inflated bulla with small circular, infralaminal apertures. [Olsson et al. 2006]

Wall type: Cancellate, apparently spinose, ruber/sacculifer-type wall texture, generally with heavy gametogenetic calcification. [Olsson et al. 2006]

Test morphology: Low trochospiral, lobulate test with 4 chambers in the final whorl. Chambers globular, embracing, increasing rapidly in size with a small globular, slightly inflated bulla extending over the umbilicus; wall thickened by gametogenetic calcite in adult specimens; in spiral view 4 globular chambers increasing rapidly in size; sutures straight to slightly curved, moderately depressed; in umbilical view 4 globular chambers, with a slightly inflated bulla that has one infralaminal aperture with a continuous, thickened imperforate rim, sutures straight, moderately depressed; in edge view ovoid in shape with small bulla. [Olsson et al. 2006]

Size: Holotype maximum diameter 0.22 mm,thickness 0.17 mm. [Olsson et al. 2006]

Character matrix

test outline:Lobatecoiling axis:Lowchamber arrangement:Trochospiralumbilicus:Narrow
edge view:Inequally biconvexumbilical or test sutures:Moderately depressedspiral sutures:Moderately depressedshell porosity:Finely Perforate: 1-2.5
wall texture:Spinoseaperture:Umbilicalaperture border:Thick lipaccessory apertures:None
periphery:N/Aumb chamber shape:Globularsp chbr shape:Globularperiph margin shape:Broadly rounded
umb depth:Deepdiameter mm:0.22width mm:breadth mm:0.17
final-whorl chambers:4.0-4.0

Biogeography and Palaeobiology


Geographic distribution: Known from
tropical to mid latitude sites. [Olsson et al. 2006]
Aze et al. 2011 summary: Cosmopolitan; based on Olsson et al. (2006c)

Isotope paleobiology: No data available. [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): Poore & Matthews (1984); Pearson et al. (2001a)

Phylogenetic relations: Catapsydrax howei probably evolved from C. unicavus in the middle Eocene by becoming larger and more loosely coiled, and developing a large, globular, inflated bulla with large circular, infralaminal apertures. [Olsson et al. 2006]

Biostratigraphic distribution

Geological Range:
Notes: Zone E2 to N6. [Olsson et al. 2006]
Last occurrence (top): within N6 zone (17.54-17.59Ma, top in Burdigalian stage). Data source: Eocene Atlas
First occurrence (base): within E2 zone (55.20-55.81Ma, base in Ypresian 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. 75

References:

Asano, K., (1962). Tertiary Globigerinids from Kyushu, Japan. Science Reports of the Tohuku University, Series 2 (Geology), Special Volume, 5: 49-65.

Bermudez, P.J., (1937). Nuevas especies de Foraminiferos del Eoceno de las cercanias de Guanajay, provincia Pinar del Rio, Cuba. Memorias de la Sociedad Cubana de Historia Natural, 11(4): 237-248.

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.

Blow, W.H., (1969). Late middle Eocene to Recent planktonic foraminiferal biostratigraphy. In: Bronnimann, P. and Renz, H.H. (Editors), Proceedings of the First International Conference on Planktonic Microfossils, Geneva, 1967, Leiden, Netherlands, pp. 380-381.

Blow, W.H., (1979). The Cainozoic Globigerinida: A study of the morphology, taxonomy, evolutionary relationships and stratigraphical distribution of some Globigerinida (mainly Globigerinacea). E. J. Brill, Leiden, 1413 pp.

Bolli, H.M., (1957). Planktonic foraminifera from the Oligocene-Miocene Cipero and Lengua formations of Trinidad, B.W.I. 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. 97-123.

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.

Brönnimann, P., (1952). Trinidad Paleocene and lower Eocene Globigerinidae. Bulletin of American Paleontology, 34(143): 1-34.

Finlay, H.J., (1939). New Zealand foraminifera: Key species in stratigraphy - no. 2. Transactions of the Royal Society of New Zealand, 69(1): 89-128.

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.

Huber, B.T., (1991). Paleogene and early Neogene planktonic foraminifer biostratigraphy of ODP Leg 119 Sites 738 and 744, Kerguelen Plateau (southern Indian Ocean). Proceedings of the Ocean Drilling Program, Scientific Results, 119: 427-449.

Jenkins, D.G., (1964). Globigerina woodi Jenkins subsp. connecta Jenkins, 1964: A new planktonic foraminiferal subspecies from the Australasian Lower Miocene. Micropaleontology, 10(1): +72+.

Kennett & Srivinasan 1983 [sorry, not in our bibliography yet]

Krasheninnikov, V.A. & Basov, I.A., (1983). Stratigraphy of Cretaceous sediments of the Falkland Plateau based on planktonic foraminifers, Deep Sea Drilling Project, Leg 71. In: Ludwig, W.J., Krasheninnikov, V.A. and al., e. (Editors), Initial Reports of the Deep Sea Drilling Project. U.S. Government Printing Office, Washington, D.C., pp. 789-820.

Loeblich, A.R., Jr. & Tappan, H., (1957). Planktonic foraminifera of Paleocene and early Eocene Age from the Gulf and Atlantic coastal plains. In: Loeblich, A.R., Jr. et al. (Editors), Studies in Foraminifera, U.S. National Museum Bulletin 215. U.S. Government Printing Office, Washington, D.C., pp. 173-198.

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.

Poore, R.Z. & Matthews, R.K., (1984). Oxygen isotope ranking of late Eocene and Oligocene planktonic foraminifers: implications for Oligocene sea-surface temperatures and global ice-volume. Marine Micropaleontology, 9: 111-134.

Spezzaferri, S., (1994). Planktonic foraminiferal biostratigraphy and taxonomy of the Oligocene and lower Miocene in the oceanic record. An overview. Palaeontographia Italica, 81: 1-187.

Stainforth, R.M.; Lamb, J.L.; Luterbacher, H.; Beard, J.H. & Jeffords, R.M., (1975). Cenozoic planktonic foraminiferal zonation and characteristics of index forms. The University of Kansas Paleontological Contributions, 62: 1-425.


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Catapsydrax unicavus compiled by the pforams@mikrotax project team viewed: 23-7-2017

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