Ciperoella fariasi


Classification: pf_cenozoic -> Globigerinidae -> Ciperoella -> Ciperoella fariasi
Sister taxa: C. anguliofficinalis, C. angulisuturalis, C. ciperoensis, C. fariasi, C. sp.,

Taxonomy

Citation: Ciperoella fariasi (Bermúdez, 1961)
Rank: species
Basionym: Globigerina fariasi Bermúdez, 1961
Synonyms:
Taxonomic discussion:

A relatively less common species. Blow (1979) considered this species to be a prior synonym of Globigerina ouachitaensis gnaucki Blow and Banner. However in this work gnaucki is regarded as a distinct species within Globoturborotalita (see Chapter 8, this volume) and the ancestor of the Ciperoella group. [Olsson et al. 2018]

Catalog entries: Globigerina fariasi

Type images:

Distinguishing features: Like C. ciperoensis but with larger, more globular, test, larger umbilicus and higher trochospire. 

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


Diagnostic characters:

The species is distinguished from C. ciperoensis by the larger more globular test, larger umbilicus and higher trochospire. It bears some resemblance to Globigerinella wagneri (Chapter 6, this volume) but has a Neogloboquadrina-type wall texture, compared to the bulloides-type wall in the former. [Olsson et al. 2018]


Wall type: Normal perforate, spinose, Neogloboquadrina-type wall structure. Pore concentrations range from around 25-60 pores/50 μm2 test surface area and pore diameters from around 0.9-2.5 μm.

Test morphology: High trochospiral, globular, lobulate in outline, chambers globular; in spiral view 5 globular, slightly embracing chambers in ultimate whorl, increasing slowly in size, ultimate chamber may be smaller than the penultimate chamber, sutures depressed, straight; in umbilical view 5 globular, slightly embracing chambers, increasing slowly in size, ultimate chamber often smaller than the penultimate chamber, sutures depressed, straight, umbilicus large, open, enclosed by surrounding chambers, aperture umbilical, a rounded arch, bordered by a thin rim; in edge view chambers globular, slightly embracing, initial whorl of chambers highly elevated. [Olsson et al. 2018]

Size: Maximum diameter of holotype 0.36 mm, minimum diameter 0.30 mm, thickness 0.30 mm. [Olsson et al. 2018]

Character matrix

test outline:Lobatechamber arrangement:Trochospiraledge view:Concavo-convexaperture:Umbilical
sp chamber shape:Globularcoiling axis:Moderate-highperiphery:N/Aaperture border:N/A
umb chbr shape:Globularumbilicus:Wideperiph margin shape:Broadly roundedaccessory apertures:None
spiral sutures:Moderately depressedumb depth:Deepwall texture:Spinoseshell porosity:Finely Perforate: 1-2.5µm
umbilical or test sutures:Strongly depressedfinal-whorl chambers:5.0-5.0 N.B. These characters are used for advanced search. N/A - not applicable

Biogeography and Palaeobiology


Geographic distribution: Occurs in low to middle latitudes. [Olsson et al. 2018]

Isotope paleobiology: No data available. [Olsson et al. 2018]

Phylogenetic relations: Closely related to C. ciperoensis which gave rise to C. fariasi in the mid-Oligocene. [Olsson et al. 2018]

Most likely ancestor: Ciperoella ciperoensis - at confidence level 4 (out of 5). Data source: Olsson et al. 2018.

Biostratigraphic distribution

Geological Range:
Notes: Zone O3 to M1 (?) (Spezzaferri, 1994). Pearson and Chaisson (1997) identified this species from Zone O3 at Ceara Rise, equatorial Atlantic Ocean. [Olsson et al. 2018]
Last occurrence (top): within M1 zone (21.12-22.96Ma, top in Aquitanian stage). Data source: Olsson et al. 2018
First occurrence (base): within O3 zone (29.18-30.28Ma, base in Rupelian stage). Data source: Olsson et al. 2018

Plot of occurrence data:

Primary source for this page: Olsson et al. 2018 - Olig Atlas chap.7 p.226

References:

Bermudez, P. J. (1961). Contribucion al estudio de las Globigerinidea de la region Caribe-Antillana (Paleoceno-Reciente). Editorial Sucre, Caracas. 1119-1393. gs

Blow, W. H. (1969). Late middle Eocene to Recent planktonic foraminiferal biostratigraphy. In, Bronnimann, P. & Renz, H. H. (eds) Proceedings of the First International Conference on Planktonic Microfossils, Geneva, 1967. E J Brill, Leiden 380-381. gs

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. 2: 1-1413. gs

Bolli, H. M. & Saunders, J. B. (1985). Oligocene to Holocene low latitude planktic foraminifera. In, Bolli, H. M. , Saunders, J. B. & Perch-Neilsen, K. (eds) Plankton Stratigraphy. Cambridge University Press, Cambridge, UK 155-262. gs

Krasheninnikov, V. A. & Pflaumann, U. (1978). Cretaceous agglutinated foraminifera of the Atlantic Ocean off west Africa (Leg 41, Deep Sea Drilling Project). Initial Reports of the Deep Sea Drilling Project. 41: 565-580. gs

Molina, E. (1979). Oligoceno-Mioceno inferior por media de foraminiferos planctonicos en el sector central de las Cordilleraa Beticas Espana (Tesis doctoral). . 1-342. gs

Olsson, R. K., Hemleben, C., Coxall, H. K. & Wade, B. S. (2018). Taxonomy, biostratigraphy, and phylogeny of Oligocene Ciperoella. In, Wade, B. S. , Olsson, R. K. , Pearson, P. N. , Huber, B. T. & Berggren, W. A. (eds) Atlas of Oligocene Planktonic Foraminifera. Cushman Foundation for Foraminiferal Research, Special Publication. 46(Chap 7): 215-230. gs

Pearson, P. N. & Chaisson, W. P. (1997). Late Paleocene to middle Miocene planktonic foraminifer biostratigraphy, Ceara Rise. Proceedings of the Ocean Drilling Program, Scientific Results. 33-68. gs

Spezzaferri, S. & Premoli Silva, I. (1991). Oligocene planktonic foraminiferal biostratigraphy and paleoclimatic interpretation from Hole 538A, DSDP Leg 77, Gulf of Mexico. Palaeogeography, Palaeoclimatology, Palaeoecology. 83: 217-263. gs

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. gs


logo

Ciperoella fariasi compiled by the pforams@mikrotax project team viewed: 24-10-2019

Taxon Search:
Advanced Search

Short stable page link: http://mikrotax.org/pforams/index.php?id=104359 Go to Archive.is to create a permanent copy of this page - citation notes



Comments (0)

No comments yet. Be the first!

Add Comment

* Required information
1000
Captcha Image
Powered by Commentics