pforams@mikrotax - Ciperoella fariasi

Citation: Ciperoella fariasi (Bermúdez, 1961)

Basionym: Globigerina fariasi Bermúdez, 1961

Synonyms:

Globigerina fariasi Bermúdez, 1961:1181, pl. 3, figs. 5a-c [mid-Oligocene, Tingnaro Fm., Matanzas Province, Cuba].—Molina, 1979:154, pl. 11, figs. 2A-B [upper Oligocene Zone P22, DSDP Site 538A, Gulf of Mexico].—Bolli and Saunders, 1985:182, fig. 13.9a-c (re-illustration of holotype) [mid-Oligocene, Tingnaro Fm., Matanzas Province, Cuba].
“Globigerina” ciperoensis fariasi Bermúdez.—Spezzaferri and Premoli Silva, 1991:237, pl. IV, figs. 6a-d [upper Oligocene Zone P22, DSDP Hole 538A, Gulf of Mexico].
Globigerina anguliofficinalis Blow.—Krasheninnikov and Pflaumann, 1978:592, pl. 5, figs. 1-3 [Oligocene, DSDP Site 369, eastern North Atlantic Ocean]. [Not Blow, 1969.]
Not Globigerina ouachitaensis fariasi Bermúdez.—Blow, 1979:778, pl. 2, figs. 1-3 (Blow and Banner holotype of G. gnaucki reproduced) [Zone P19, Lindi area, Tanzania] = Globoturborotalita gnaucki.

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]

Distinguishing features:
Parent taxon (Ciperoella): Like Globoturborotalita, but with distinctive reticulate wall, and 4½-5 chambers in final whorl
This taxon: Like C. ciperoensis but with larger, more globular, test, larger umbilicus and higher trochospire.

Description

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]

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]

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.

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

Biogeography and Palaeobiology

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

No data available. [Olsson et al. 2018]

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

References:

Berggren, W. A. & Pearson, P. N. (2006a). Taxonomy, biostratigraphy, and phylogeny of Eocene Morozovella. In, Pearson, P. N., Olsson, R. K., Hemleben, C., Huber, B. T. & Berggren, W. A. (eds) Atlas of Eocene Planktonic Foraminifera. Cushman Foundation for Foraminiferal Research, Special Publication . 41(Chap 11): 343-376. gs O

Berggren, W. A., Olsson, R. K. & Premoli Silva, I. (2006a). Taxonomy, biostratigraphy and phylogenetic affinities of Eocene Astrorotalia, Igorina, Planorotalites, and Problematica (Praemurica? lozanoi). In, Pearson, P. N., Olsson, R. K., Hemleben, C., Huber, B. T. & Berggren, W. A. (eds) Atlas of Eocene Planktonic Foraminifera. Cushman Foundation for Foraminiferal Research, Special Publication . 41(Chap 12): 377-400. gs

Bermudez, P. J. (1961). Contribucion al estudio de las Globigerinidea de la region Caribe-Antillana (Paleoceno-Reciente). Editorial Sucre, Caracas. (3): 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. 154: 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

test outline:	Lobate	chamber arrangement:	Trochospiral	edge view:	Concavo-convex	aperture:	Umbilical
sp chamber shape:	Globular	coiling axis:	Moderate-high	periphery:	N/A	aperture border:	N/A
umb chbr shape:	Globular	umbilicus:	Wide	periph margin shape:	Broadly rounded	accessory apertures:	None
spiral sutures:	Moderately depressed	umb depth:	Deep	wall texture:	Spinose	shell porosity:	Finely Perforate: 1-2.5µm
umbilical or test sutures:	Strongly depressed	final-whorl chambers:	5-5	N.B. These characters are used for advanced search. N/A - not applicable

Ciperoella fariasi

Taxonomy

Description

Biogeography and Palaeobiology

Biostratigraphic distribution

References:

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