Globigerinoides bollii


Classification: pf_cenozoic -> Globigerinidae -> Globigerinoides -> Globigerinoides bollii
Sister taxa: G. elongatus, G. extremus, G. conglobatus, G. eoconglobatus, G. obliquus, G. altiaperturus, G. joli, G. neoparawoodi, G. kennetti, G. bollii, G. italicus, G. ruber, G. mitra, G. seigliei, G. subquadratus, G. diminutus, G. bulloideus, G. sp.,

Taxonomy

Citation: Globigerinoides bollii (Blow 1959)
Rank: species
Basionym: Globigerinoides bollii Blow 1959
Synonyms:
Taxonomic discussion:

This species was originally described as ranging from the Miocene Globorotalia mayeri Zone (Vindobonian) to the Globigerina bulloides Zone. However, its range was extended into the lower Miocene Subzone M1b by Spezzaferri (1994). It first occurs after the radiation level of Globigerinoides (Spezzaferri, 1994) but it is very rare until the middle Miocene. Specimens at the beginning of the range possess only one very small supplementary aperture on the spiral side (Spezzaferri, 1994), whereas younger specimens may have 2 supplementary apertures (Blow, 1959; Kennett and Srinivasan, 1983). Keller (1981) suggested Globoturborotalita woodi as a possible direct ancestor for this species but that phylogenetic relationship is not retained here.

[Spezzaferri et al. 2018]

Catalog entries: Globigerinoides bollii

Type images:

Distinguishing features: Small, compact,  aperture almost circular. Supplementary sutural aperture on spiral side

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:

It is distinguished from G. altiaperturus by the strongly embracing chambers in the last whorl, the more compact test and the primary aperture, which is a small rounded arch. It differs from G. italicus by the completely umbilical and smaller aperture and from G. neoparawoodi n. sp. by the more compact test and smaller primary aperture. It differs from G. subquadratus by the smaller primary aperture and by its 3½-4 chambers in the last whorl instead of three. [Spezzaferri et al. 2018]


Wall type: Normal perforate, spinose, ruber/sacculifer-type wall, strongly pustulose. [Spezzaferri et al. 2018]

Test morphology: Compact, low trochospiral consisting of 2½-3 whorls. Outline subtriangular in 4 chambered specimens to subrectangular in 3½ chambered ones, the inner whorls are not visible because of the compact coiling; chambers embracing and subglobular; gradually increasing in size. Sutures slightly depressed, straight to slightly curved on both sides, umbilicus narrow and fairly deep. Primary aperture umbilical, a medium to rarely low semicircular arch. One (sometimes two) supplementary apertures occur on the spiral side ranging from a small and subcircular arch to a very small slightly arched slit placed on the suture between the last and the penultimate chambers. [Spezzaferri et al. 2018]

Size: Maximum diameter of holotype 0.34 mm. [Spezzaferri et al. 2018]

Character matrix

test outline:Ovatechamber arrangement:Trochospiraledge view:Equally biconvexaperture:Umbilical
sp chamber shape:Globularcoiling axis:Low-moderateperiphery:N/Aaperture border:N/A
umb chbr shape:Globularumbilicus:Wideperiph margin shape:Broadly roundedaccessory apertures:Sutural
spiral sutures:Strongly depressedumb depth:Deepwall texture:Cancellateshell porosity:Macroperforate: >2.5µm
umbilical or test sutures:Strongly depressedfinal-whorl chambers:3.5-4.0 N.B. These characters are used for advanced search. N/A - not applicable

Biogeography and Palaeobiology


Geographic distribution: Typical of low latitudes, most abundant in the equatorial Atlantic Ocean (Spezzaferri, 1994). [Spezzaferri et al. 2018]

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

Phylogenetic relations: It probably evolved from Globigerinoides italicus in the middle part of Subzone M1b. [Spezzaferri et al. 2018]

Most likely ancestor: Globigerinoides italicus - at confidence level 2 (out of 5). Data source: Kennett & Srinivasan 1983, fig.9.
Likely descendants: Globigerinoides kennetti;

Biostratigraphic distribution

Geological Range:
Notes: Rarely found from the middle part of Subzone M1b (Chaisson and Leckie, 1993; Spezzaferri, 1994) to the upper Pliocene Zone PL 4-5 interval (Kennett and Srinivasan, 1983). [Spezzaferri et al. 2018]
Last occurrence (top): within PL5 [Atl.] zone (2.39-3.13Ma, top in Gelasian stage). Data source: Spezzaferri et al. 2018
First occurrence (base): within M1b subzone (21.12-22.44Ma, base in Aquitanian stage). Data source: Spezzaferri et al. 2018

Plot of occurrence data:

Primary source for this page: Spezzaferri et al. 2018 - Olig Atlas chap.9 p.276; Kennett & Srinivasan 1983, p.70

References:

Aze, T. et al. (2011). A phylogeny of Cenozoic macroperforate planktonic foraminifera from fossil data. Biological Reviews. 86: 900-927. gs

Blow, W. H. (1959). Age, correlation, and biostratigraphy of the upper Tocuyo (San Lorenzo) and Pozon Formations, eastern Falcon, Venezuela. Bulletins of American Paleontology. 39(178): 67-251. 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

Chaisson, W. P. & Leckie, R. M. (1993). High-resolution Neogene planktonic foraminifer biostratigraphy of Site 806, Ontong Java Plateau (Western Equatorial Pacific). Proceedings of the Ocean Drilling Program, Scientific Results. 130: 137-178. gs

Keller, G. (1981). Origin and evolution of the genus Globigerinoides in the Early Miocene of the northwestern Pacific, DSDP Site 292. Micropaleontology. 27(3): 293-304. gs

Keller, G. (1985). Depth stratification of planktonic foraminifers in the Miocene Ocean. In, Kennett, J. P. (ed.) The Miocene Ocean: Paleoceanography and Biogeography. GSA Memoir. 163: 1-337. gs

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

Spezzaferri, S., Olsson, R. K. & Hemleben, C. (2018b). Taxonomy, biostratigraphy, and phylogeny of Oligocene to Lower Miocene Globigerinoides and Trilobatus. 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 9): 269-306. gs


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Globigerinoides bollii compiled by the pforams@mikrotax project team viewed: 14-11-2019

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