holotype: P. obliquiloculata finalis_1966-2-3-1_Holo.JPG)
holotype: P. obliquiloculata finalis
Catalog entries: Pulleniatina obliquiloculata finalis
Type images:
holotype: P. obliquiloculata finalis_1966-2-3-1_Holo.JPG)
holotype: P. obliquiloculata finalisDistinguishing features:
Parent taxon (Pulleniatina): Compact streptospiral test with smooth cortical coating and large slit-like aperture
This taxon: Like P. obliquiloculata but more involute, aperture wider, fewer chambers in final whorl (4 vs 4-5)
Wall type:
Character matrix
| test outline: | Subcircular | chamber arrangement: | Trochospiral | edge view: | Equally biconvex | aperture: | Umbilical-extraumbilical |
| sp chamber shape: | Crescentic | coiling axis: | Low | periphery: | N/A | aperture border: | N/A |
| umb chbr shape: | Subtriangular | umbilicus: | Narrow | periph margin shape: | Broadly rounded | accessory apertures: | None |
| spiral sutures: | Flush | umb depth: | Shallow | wall texture: | Smooth | shell porosity: | Macroperforate: >2.5µm |
| umbilical or test sutures: | Flush | final-whorl chambers: | 4-4 | N.B. These characters are used for advanced search. N/A - not applicable | |||
[SCOR WG138]
Geographic distribution
Isotope paleobiology
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..
Geological Range:
Last occurrence (top): Non-extinct palaeontological taxon. Data source: Pearson & Penny 2021, Brummer & Kucera 2022: The morphotype occurs at the present day but is formed by the species T. obliquiloculata , so this taxon is not used by biologists
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:
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 Brummer, G-J. A. & Kucera, M. (2022). Taxonomic review of living planktonic foraminifera. Journal of Micropalaeontology. 41: 29-74. gs Chaisson, W. P. & Pearson, P. N. (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 Pearson, P. N. & Penny, L. (2021). Coiling directions in the planktonic foraminifer Pulleniatina: A complex eco-evolutionary dynamic spanning millions of years. PLoS One. 16: 360-. gs Wade, B. S., Pearson, P. N., Berggren, W. A. & Pälike, H. (2011). Review and revision of Cenozoic tropical planktonic foraminiferal biostratigraphy and calibration to the geomagnetic polarity and astronomical time scale. Earth-Science Reviews. 104: 111-142. gsReferences:
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Pulleniatina finalis compiled by the pforams@mikrotax project team viewed: 15-9-2024
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