pforams@mikrotax - Parasubbotina hagni

Citation: Parasubbotina hagni (Gohrbandt 1967)

Basionym: Globigerina hagni Gohrbandt 1967

Synonyms:

Globigerina eocaena Guembel. —Subbotina, 1953:85, pl. 6: fig. 5a-c; pl. 7: fig. 1a-c [upper Eocene Acarinina Zone (upper part), Kuban River, northern Caucasus]. [Not Guembel, 1868.]
Globigerina hagni Gohrbandt, 1967:324, pl.1: figs. 1-9 (1-3 = holotype, 4-9 = paratypes) [middle Eocene, Helvetikum, Salzburg, Austria].—Toumarkine and Luterbacher, 1985:150, fig. 42-7a-c (reillustration of holotype), figs. 8, 9 [middle Eocene Hantkenina nuttalli Zone, Possagno, Italy].
Subbotina hagni (Gohrbandt).—Poore and Brabb, 1977:269, pl. 4: figs. 13, 14 [middle Eocene Zone E12/13, Butano Sandstone, Santa Cruz Mountains, California]._Warraich and Ogasawara, 2001:48, fig. 14: 5-7 [middle Eocene, Baska Fm., Sulaiman Range, Pakistan].
Parasubbotina hagni (Gohrbandt).—Rögl and Egger, 2012:44, pl.2, figs. 22-27 (25 paratype) [middle Eocene Zone E8, Holzhӓusl section north-east of Mattsee, Austria].

Taxonomic discussion: Globigerina hagni Gohrbandt (1967) was previously assigned to Subbotina by various authors including Poore and Brabb (1977) and Olsson and others (2006). Rögl and Egger (2012) re-examined and illustrated the type specimens described by Gohrbandt and concluded that hagni belonged in the genus Parasubbotina. Olsson and others (2006) restricted P. hagni to the Eocene. However, Wade and Pearson (2008) recorded specimens from Tanzania (as Subbotina hagni), with a stratigraphic range that extends into lower Oligocene Zone O1 (Figure 5.1). [Leckie et al. 2018]

Gohrbandt (1967) noted that the illustrations of Globigerina eocaena Guembel by Subbotina (1953) corresponded to his new species, although he did not formally place these in synonomy with his new species. He also acknowledged that Hagn and Lindenberg (1969), who selected a neotype for G. eocaena, did not consider Subbotina’s illustrations of G. eocaena to be correctly identified. Subbotina hagni has not been widely recorded by workers, perhaps because it has been generally grouped with S. eocaena populations. We have identified it in the Aragon Formation of Mexico and California, which indicates a widespread distribution for this species. [Olsson et al. 2006]

Distinguishing features: Large adult test, quadrate. Chambers globular, embracing. Aperture low-arched, umbilical-extraumbilical, with thin irregular lip.

Description

Diagnostic characters: The species is characterized by its generally large adult size, quadrate test, and globular, embracing, chambers with a low-arched, umbilical-extraumbilical aperture bordered by a thin irregular lip. [Olsson et al. 2006]

Biogeography and Palaeobiology

Geographic distribution: Apparently global in low to mid latitudes. [Olsson et al. 2006]
Aze et al. 2011 summary: Low to middle latitudes; based on Olsson et al. (2006a)

Isotope paleobiology: No data available. [Olsson et al. 2006]
Aze et al. 2011 ecogroup 3 - Open ocean thermocline. Based on light δ¹³C and relatively heavy δ¹⁸O. Sources cited by Aze et al. 2011 (appendix S3): Coxall et al. (2000)

Phylogenetic relations: Subbotina hagni belongs to a group of closely related Eocene large-sized subbotinids, which includes S. eocaena and S. corpulenta. It probably evolved from S. eocaena by an increase in number of chambers in the ultimate whorl and the development of a more quadrate-shaped test. [Olsson et al. 2006]

Most likely ancestor: Subbotina eocaena - at confidence level 4 (out of 5). Data source: Olsson et al. 2006 f6.2.

Biostratigraphic distribution

Geological Range:
Notes: Zone E7 to Zone 16. [Olsson et al. 2006]
Last occurrence (top): within E16 zone (33.90-34.68Ma, top in Priabonian stage). Data source: Eocene Atlas
First occurrence (base): within E7 zone (45.72-50.20Ma, base in Ypresian stage). Data source: Eocene Atlas

Primary source for this page: Olsson et al. 2006 - Eocene Atlas, chap. 6, p. 142; Leckie et al. 2018 - Olig Atlas chap. 5 p.127.

References:

Gohrbandt, K.H.A., (1967). Some new planktonic foraminiferal species from the Austrian Eocene. Micropaleontology, 13(3): 319-326. GS

Guembel, C.W., (1868). Beitrage zur Foraminiferenfauna der nordalpinen Eocangebilde. K Bayer Akad Wiss Munchen, Math-Physik Cl, Abh, 10(2): 581-730. GS

Gümbel, C.W., (1868). Beiträge zur Foraminiferenfauna der nordalpinen, älteren Eocängebilde oder der Kressenberger Nummulitenschichten. Abhandlungen der K. Bayerische Akademie der Wissenschaften, Cl. II,, 10(2): 579-730. GS

Hagn, H. & Lindenberg, H.G., (1969). Revision der von C. W. Gümbel 1868 aus dem Eozän des bayerischen Alpenvorlandes beschriebenen planktonischen Foraminiferen. In: Brönnimann, P. and Renz, H.H. (Editors), Proceedings of the First International Conference on Planktonic Microfossils. E. J. Brill, Leiden, pp. 229-249. GS

Leckie, R.M.; Wade, B.S.; Pearson, P.N.; Fraass, A.J.; King, D.J.; Olsson, R.K.; Premoli Silva, I.; Berggren, W.A. & S.Spezzaferri, (2018). Taxonomy, biostratigraphy, and phylogeny of Oligocene and Lower Miocene Paragloborotalia and Parasubbotina. In: Wade, B.S., Olsson, R.K., Pearson, P.N., Huber, B.T. and Berggren, W.A. (Editors), Atlas of Oligocene Planktonic Foraminifera. Cushman Foundation for Foraminiferal Research Special Pulbication, pp. 125-179. GS

Olsson, R.K.; Pearson, P.N. & Huber, B.T., (2006). Taxonomy, biostratigraphy, and phylogeny of Eocene Catapsydrax, Globorotaloides, Guembelitrioides, Paragloborotalia, Parasubbotina, and Pseudoglobigerinella n. gen. In: Pearson, P.N., Olsson, R.K., Hemleben, C., Huber, B.T. and Berggren, W.A. (Editors), Atlas of Eocene Planktonic Foraminifera. Cushman Foundation Special Publication. Allen Press, Lawrence, Kansas, pp. 67-110. GS

Olsson, R.K.; Hemleben, C.; Huber, B.T. & Berggren, W.A., (2006). Taxonomy, biostratigraphy, and phylogeny of Eocene Globigerina, Globoturborotalita, Subbotina, and Turborotalita. In: Pearson, P.N., Olsson, R.K., Hemleben, C., Huber, B.T. and Berggren, W.A. (Editors), Atlas of Eocene Planktonic Foraminifera. Cushman Foundation Special Publication. Allen Press, Lawrence, Kansas, pp. 111-168. GS

Poore, R.Z. & Brabb, E.E., (1977). Eocene and Oligocene planktonic foraminifera from the Upper Butano sandstone and type San Lorenzo formation, Santa Cruz Mountains, California. Journal of Foraminiferal Research, 7(4): 249-272. GS

Rögl, F. & Egger, H., (2012). A revision of lower Paleogene planktonic foraminifera described by KHA Gohrbandt from the northwestern Tethyan realm (Helvetic nappe system, Salzburg, Austria). Austrian Journal of Earth Sciences, 105: 39-49. GS

Subbotina, N., (1953). Foraminiferes fossiles d'URSS Globigerinidae, Globorotaliidae, Hantkeninidae. Bureau de Recherches Geologiques et Minieres, 2239: 1-144. GS

Toumarkine, M. & Luterbacher, H. (Editors), (1985). Paleocene and Eocene planktic foraminifera. Plankton Stratigraphy. Cambridge Univ. Press, Cambridge, 87-154 pp. GS

Wade, B.S. & Pearson, P.N., (2008). Planktonic foraminiferal turnover, diversity fluctuations and geochemical signals across the Eocene/Oligocene boundary in Tanzania. Marine Micropaleontology, 68: 244-255. GS

Warraich, M.Y. & Ogasawara, K., (2001). Tethyan Paleocene-Eocene planktic foraminifera from the Rakhi Nala and Zinda Pir land sections of the Sulaiman Range, Pakistan. Science Reports of the Institute of Geosciences, University of Tsukuba, Section B = Geological Sciences, 22: 1-59. GS

test outline:	Lobate	chamber arrangement:	Trochospiral	edge view:	Inequally biconvex	aperture:	Umbilical-extraumbilical
sp chamber shape:	Globular	coiling axis:	Low	periphery:	N/A	aperture border:	Thin lip
umb chbr shape:	Globular	umbilicus:	Narrow	periph margin shape:	Broadly rounded	accessory apertures:	None
spiral sutures:	Strongly depressed	umb depth:	Deep	wall texture:	Cancellate	shell porosity:	Finely Perforate: 1-2.5µm
umbilical or test sutures:	Strongly depressed	final-whorl chambers:	4.0-4.0

Parasubbotina hagni

Taxonomy

Description

Biogeography and Palaeobiology

Biostratigraphic distribution

Comments (0)

Add Comment