Pulleniatina finalis


Classification: pf_cenozoic -> Globorotaliidae -> Pulleniatina -> Pulleniatina finalis
Sister taxa: P. finalis, P. obliquiloculata, P. praecursor, P. primalis, P. spectabilis, P. praespectabilis, P. sp.,

Taxonomy

Citation: Pulleniatina finalis Banner & Blow, 1967
Rank: species
Basionym: Pulleniatina obliquiloculata finalis
Taxonomic discussion: Considerd synonym of P. obliquiloculata by Kennett & Srinivasan (1983) but a discrete species by Aze et al. (2011)

Catalog entries: Pulleniatina obliquiloculata finalis

Type images:

Distinguishing features: Like P. obliquiloculata but more involute, aperture wider, fewer chambers in final whorl (4 vs 4-5)

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: Involute, planispiral with a very broadly rounded periphery

Aperture: Extra-umbilical high arch [Aze 2011, based on Bolli & Saunders 1985]


Wall type: Non-spinose; Smooth [Aze 2011]

Character matrix

test outline:Subcircularchamber arrangement:Trochospiraledge view:Equally biconvexaperture:Umbilical-extraumbilical
sp chamber shape:Crescenticcoiling axis:Lowperiphery:N/Aaperture border:N/A
umb chbr shape:Subtriangularumbilicus:Narrowperiph margin shape:Broadly roundedaccessory apertures:None
spiral sutures:Flushumb depth:Shallowwall texture:Smoothshell porosity:Macroperforate: >2.5µm
umbilical or test sutures:Flushfinal-whorl chambers:4.0-4.0 N.B. These characters are used for advanced search. N/A - not applicable

Biogeography and Palaeobiology


Geographic distribution: Low latitudes [Aze et al. 2011, based on This study]

[SCOR WG138]


Isotope paleobiology: Aze et al. 2011 ecogroup 3 - Open ocean thermocline. Based on comparison with other species of the genus

Most likely ancestor: Pulleniatina obliquiloculata - at confidence level 1 (out of 5). Data source: P. finalis was considered to have evolved from or to be a variant of P. obliquiloculata by Banner & Blow (1967), Kennett & Srinivasan (1983), and Chaisson & Pearson (1997). Aze et al. (2011), however, record the probable ancestor as P. spectabilis but without citing any supporting evidence..

Biostratigraphic distribution

Geological Range:
Last occurrence (top): Extant Data source: described as extant by Aze et al. (2011) but not recognised by WG138
First occurrence (base): in upper part of PL6 [Atl.] zone (67% up, 2Ma, in Gelasian stage). Data source: Wade et al. (2011), additional event; position within zone determined by linear interpolation from data in table 1 of Wade et al. (2011).

Plot of occurrence data:

References:

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

Banner, F. T. & Blow, W. H. (1967). The origin, evolution and taxonomy of the foraminiferal genus Pulleniatina Cushman, 1927. Micropaleontology. 13(2): 133-162. 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. & Pearson, P. N. P. (1997). Planktonic foraminifer biostratigraphy at Site 925: Middle Miocene–Pleistocene. Proceedings of the Ocean Drilling Program, Scientific Results,. 154: 3-31. gs

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


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Pulleniatina finalis compiled by the pforams@mikrotax project team viewed: 11-12-2019

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Short stable page link: http://mikrotax.org/pforams/index.php?id=104205 Go to Archive.is to create a permanent copy of this page - citation notes



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