This species was discussed by Olsson and Hemleben (2006) who followed Toumarkine and Luterbacher (1985) in regarding P. barbadoensis Blow as a junior synonym. The type specimen of P. naguewichiensis is lost; the illustration reproduced on Plate 14.1, Figs. 1-2, shows quite clearly a planispiral evolute form with relatively straight sutures, a lobate outline and only six chambers in the final whorl. The holotype of P. barbadoensis, reproduced on Plate 14.1, Figs. 3-4, is also evolute but is larger, less lobate and has more curved sutures. However, like P. naguewichiensis, P. barbadoensis has more inflated chambers, a more rounded periphery, and a more coarsely perforate test than P. micra. Together these specimens illustrate much of the range of variation shown by this species.This synonymy of barbadoensis with naguewichiensis was also discussed by Pearson and Wade (2015). [Pearson et al. 2018]
Blow (1979) regarded Pseudohastigerina barbadoensis Blow as a subspecies of P. naguewichiensis (Myatliuk) and separated the two morphotypes on the basis of more embracing chambers and more common “pore pits” in P. barbadoensis. The “pore pits” are enlarged openings to pores that are located at the base of a thickened wall in adult specimens. They are probably the result of the individual maintaining access to pores during deposition of this outer layer, which may be due to deposition of gametogenetic calcite or a calcite crust in the terminal stage of the life cycle. Less heavily encrusted individuals do not exhibit as many enlarged openings to the pores and the chambers are smooth with cylindrical pore openings. The degree to which chambers embrace one another would seem to fall within a normal range of variation for a species and it is difficult to separate two morphotypes on this basis alone. For this reason we treat P. barbadoensis as a junior synonym of P. naguewichiensis. [Olsson & Hemleben 2006]
Catalog entries: Globigerinella naguewichiensis, Pseudohastigerina barbadoensis
Type images:Distinguishing features:
Parent taxon (Pseudohastigerina): Planispiral.
Aperture equatorial, sometimes bipartite, may be asymmetrical.
Wall smooth, normally perforate.
This taxon: Test small, much compressed, circular in umbilical view. Chambers globular, increase very slowly in size, Adult tests appear coarsely perforate.
Morphology:
Wall type:
Size:
Character matrix
test outline: | Circular | chamber arrangement: | Planispiral | edge view: | Equally biconvex | aperture: | Equatorial |
sp chamber shape: | Petaloid | coiling axis: | N/A | periphery: | N/A | aperture border: | Thick lip |
umb chbr shape: | Petaloid | umbilicus: | Wide | periph margin shape: | Moderately rounded | accessory apertures: | None |
spiral sutures: | Moderately depressed | umb depth: | Shallow | wall texture: | Smooth | shell porosity: | Finely Perforate: 1-2.5µm |
umbilical or test sutures: | Moderately depressed | final-whorl chambers: | 6-7 | N.B. These characters are used for advanced search. N/A - not applicable |
Geographic distribution
Isotope paleobiology
Aze et al. 2011 ecogroup 2 - Open ocean mixed-layer tropical/subtropical, without symbionts. Based on _13C lighter than species with symbionts; also with relatively light _18O. Sources cited by Aze et al. 2011 (appendix S3): Wade & Pearson (2008)
Phylogenetic relations
Most likely ancestor: Pseudohastigerina micra - at confidence level 3 (out of 5). Data source: Olsson & Hemleben (2006) fig 14.1.
Geological Range:
Notes: Zone E14 (Cotton and others, 2017) to O1 (Bolli, 1957; Leckie and others, 1993; Pearson and Chaisson, 1997; Berggren and Pearson, 2005; see also comments under Genus Pseudohastigerina, above). [Pearson et al. 2018]
The LAD of Pseudohastigerina naguewichiensis marks the base of zone O2 / top of O1 (Wade et al. 2011)
Last occurrence (top): at top of O1 zone (100% up, 32.1Ma, in Rupelian stage). Data source: zonal marker (Wade et al. 2011)
First occurrence (base): at base of E15 zone (0% up, 35.9Ma, in Priabonian stage). Data source: Olsson & Hemleben (2006) fig 14.1
Plot of occurrence data:
Primary source for this page: Pearson et al. 2018 - Olig Atlas chap.14 p.406; Olsson & Hemleben 2006 - Eocene Atlas, chap. 14, p. 424
Berggren, W. A. & Pearson, P. N. (2005). A revised tropical to subtropical Paleogene planktonic foraminiferal zonation. Journal of Foraminiferal Research. -. 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. (1957b). Planktonic foraminifera from the Oligocene-Miocene Cipero and Lengua formations of Trinidad, B.W.I. In, Loeblich, A. R. , Jr., Tappan, H., Beckmann, J. P., Bolli, H. M., Montanaro Gallitelli & E. Troelsen, J. C. (eds) Studies in Foraminifera. U.S. National Museum Bulletin . 215: 97-123. gs Cotton, L. J. et al. (2017). Integrated stratigraphy of the Priabonian (upper Eocene) Urtsadzor section, Armenia. Newsletters on Stratigraphy. 50: 269-295. gs Leckie, R. M., Farnham, C. & Schmidt, M. G. (1993). Oligocene planktonic foraminifer biostratigraphy of Hole 803D (Ontong Java Plateau) and Hole 628A (Little Bahama Bank), and comparison with the southern high latitudes. Proceedings of the Ocean Drilling Program, Scientific Results. 130: 113-136. gs Myatliuk, L. V. (1950). Stratigrafiya flishevykh osadkov severnykh Karpat v cveta dannykh fauny foraminifer [Stratigraphy of the flysch seditments of the Northern Carpathian Mountains in the light of the foraminiferal fauna.]. In, unknown (ed.) Microfauna of the USSR, 4. Trudy Vsesoyuznego Neftyanogo Nauchno-Issledovatel'skogo Geologo-Razvedochnogo Instituta (VNIGRI) . 51: 225-287. gs Nishi, H. & Chaproniere, G. C. H. (1994). Eocene-Oligocene subtropical planktonic foraminifers at Site 841,. Proceedings of the Ocean Drilling Program, Scientific Results. 135: 245-266. gs Olsson, R. K. & Hemleben, C. (2006). Taxonomy, biostratigraphy, and phylogeny of Eocene Globanomalina, Planoglobanomalina n. gen and Pseudohastigerina. 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 14): 413-432. gs O 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 Pearson, P. N. & Wade, B. S. (2015). Systematic taxonomy of exceptionally well-preserved planktonic foraminifera from the Eocene/Oligocene boundary of Tanzania. Cushman Foundation for Foraminiferal Research, Special Publication. 45: 1-85. gs Pearson, P. N., Olsson, R. K., Spezzaferri, S. & Leckie, R. M. (2018a). Taxonomy, biostratigraphy, and phylogeny of Oligocene Globanomalinidae (Turborotalia and Pseudohastigerina). 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 14): 403-414. gs Poore, R. Z. & Matthews, R. K. (1984). Oxygen isotope ranking of late Eocene and Oligocene planktonic foraminifers: implications for Oligocene sea-surface temperatures and global ice-volume. Marine Micropaleontology. 9: 111-134. 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 Subbotina, N. N. (1953). Foraminiferes fossiles d'URSS Globigerinidae, Globorotaliidae, Hantkeninidae. Bureau de Recherches Geologiques et Minieres. 2239: 1-144. gs Toumarkine, M. & Luterbacher, H. (1985). Paleocene and Eocene planktic foraminifera. In, Bolli, H. M., Saunders, J. B. & Perch-Neilsen, K. (eds) Plankton Stratigraphy. Cambridge Univ. Press, Cambridge 87-154. gs Toumarkine, M. (1975). Middle and Late Eocene planktonic foraminifera from the northwestern Pacific Ocean: Leg 32 of the Deep Sea Drilling Project. Initial Reports of the Deep Sea Drilling Project. 32: 735-751. gs Wade, B. S. & Olsson, R. K. (2009). Investigation of pre-extinction dwarfing in Cenozoic planktonic foraminifera. Palaeogeography Palaeoclimatology Palaeoecology. 284: 39-46. 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. gs Wade, B. S., Aljahdali, M. H., Mufrreh, Y. A., Memesh, A. M., AlSoubhi, S. A. & Zalmout, I. S. (2021). Upper Eocene planktonic foraminifera from northern Saudi Arabia: implications for stratigraphic ranges. Journal of Micropalaeontology. 40: 145-161. gs OReferences:
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Pseudohastigerina naguewichiensis compiled by the pforams@mikrotax project team viewed: 7-2-2025
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