pforams@mikrotax - Parasubbotina pseudobulloides

Citation: Parasubbotina pseudobulloides (Plummer 1927)

Basionym: Globigerina pseudobulloides

Synonyms:

Globigerina pseudobulloides Plummer. —Subbotina, 1950:106, pl. 4: figs. 8-10 [Danian Stage, northern Caucasus].—Troelsen, 1957:128, pl. 30: fig. 6a-c [Tylocidaris oedumi Zone, Hojerup, Stevns Klint], fig. 7a-c [basal Danian, Bogelund], fig. 8a-c [? Tylocidaris oedumi Zone, Hjerm] [all Danian Stage, Denmark],—Bolli and Cita, 1960:385, pl. 33: fig. 4a-c [Globorotalia trinidadensis -Globorotalia pseudobulloides Zone, Paderno d'Adda section, northern Italy].—Gohrbandt, 1963:44, pl. 1: figs. 7-9 [lower Paleocene, north of Salzburg, Austria].
Globorotalia pseudobulloides (Plummer).—Bolli, 1957a:73, pl. 17: figs. 19-21 [Globorotalia pusilla pusilla Zone, lower Lizard Springs Fm., Trinidad].—Loeblich and Tappan, 1957a: 192, pl. 40: fig. 3a-c [Tylocidaris oedumi Zone, Danskekalk Fm., Stevns Klint, Denmark, type Danian Stage], pl. 41: fig. la-c [Zone PI, McBryde Fm., Maryland], pl. 42: fig. 3a-c [Zone PI, Brightseat Fm., Maryland], pl. 43: fig. 3a-c [Zone PI, Kincaid Fm., Midway Group, northeastern Texas], pl. 44: fig. 6a-c [Wills Point Fm., Midway Group, northeastern Texas], pl. 45: figs. la-2c [Zone P3, Matthews Landing Marl Mbr., Porters Creek Clay, Wilcox Co., Alabama], pl. 46: fig. 6a-c [Coal Bluff Marl Mbr., Naheola Fm., Wilcox Co., Alabama] [in part, not pl. 40; fig. 9a-c (= Praemurica pseudoinconstans (Blow)), pl. 43: fig. 4a-c (= indeterminate abortive individual), pl. 44: figs. 4, 5 (= indeterminate abortive individuals)].—Olsson, 1960:46, pl. 9: figs. 19-21 [Zone PI, Homerstown Fm., New Jersey].
Globorotalia (Globorotalia) pseudobulloides (Plummer).—Hillebrandt, 1962:124, pl. 12: fig. 2a-c [lower Paleocene, Reichenhall-Salzburg Basin, Austro-German border].
Globorotalia (Turborotalia) pseudobulloides (Plummer).—Blow, 1979:1096, pl. 69: figs. 2, 3 [Zone PI, DSDP Hole 47.2/11/3: 0-5 cm], pl. 71: figs. 4, 5 [Zone PI, DSDP Hole 47.2/11/1: top section; Shatsky Rise, northwestern Pacific Ocean], pl. 75: figs. 2, 3 [Zone PI, Lindi area, Tanzania], pl. 248: figs. 6-8 [Zone P2, topotypes from Plummer locality 23, Navarro Co., Texas], pl. 255: figs. 1-6 [Zone Pic?, Karlstrup, Denmark; upper Danian].
Subbotina pseudobulloides (Plummer).—Berggren, 1992:563, pl. 1: figs. 7, 8 [Zone Plb, ODP Hole 747A/I9H/CC; Kerguelen Plateau, southern Indian Ocean].
Parasubbotina pseudobulloides (Plummer).—Olsson, Hemleben, Berggren, and Liu, 1992:197, pl. 3: figs. 1-7 [figs. 1-5: Zone Pla, Pine Barren Mbr., Clayton Fm., Alabama; figs. 6, 7: Zone P2, upper Midway Fm., Texas]. [Olsson et al. 1999]

Additional likely synonyms, not discussed in Ollson et al. 1995 [my interpretation - JRY 2019]

Globigerina moskvini Shutskaya 1953 (considered a separate species by Arenillas & Arz 2103)
Globorotalia danica (Bang 1969)= Globigerina danica Bang 1969

Taxonomic discussion: The demonstration that P. pseudobulloides has a cancellate, spinose wall texture (Olsson et al., 1992) and that it is a member of a relatively minor offshoot of the early eoglobigerinid radiation, has given pause to long-held notions about early Paleocene planktonic foraminiferal phylogenies (see also Pearson, 1993). This is because it has been commonly accepted for nearly 40 years that P. pseudobulloides was the ancestor of the post-Danian muricate morozovellid radiation (Bolli, 1957a; Blow, 1979). Parasubbotina pseudobulloides is a member of a lineage that includes P. varianta and apparently P. variospira.
The identification of P. pseudobulloides must be made with care because of the general, superficial similarity with Praemurica pseudoinconstans (see also Blow, 1979). The fundamental difference in wall texture between Parasubbotina and Praemurica may not be evident in poorly preserved specimens. [Olsson et al. 1999]

Distinguishing features:
Parent taxon (Parasubbotina): Very low trochospiral test, chambers increasing rapidly in size; aperture high-arched umbilical-extraumbilical aperture. At most 5 chambers in final whorl.
This taxon: Test medium-sized (>250µm) with 5 chambers in final whorl. Chambers inflated, globular, slightly ovoid; increasing rapidly in size. Aperture interiomarginal, umbilical to extraumbilical, a high rounded arch with a narrow lip. Umbilicus narrow; deep and open to the previous chambers. Wall cancellate spinose, with numerous spine holes

Description

Test very low trochospiral with 10-12 chambers, and with 5 chambers in the ultimate whorl. The inflated, globular chambers which are slightly ovoid in shape increase rapidly in size. The aperture is interiomarginal, umbilical to extraumbilical, a high rounded arch which is bordered by a narrow lip. The umbilicus is narrow, deep and open to the previous chambers. The cancellate spinose wall is weakly developed in the early forms of this species but becomes stronger in later forms. Spine holes are numerous and located at the juncture of and along the cancellate ridges. They may be obscured by gametogenetic and/or diagenetic calcification. The overall size of the test is generally greater than 250 um. [Olsson et al. 1999]

Biogeography and Palaeobiology

Worldwide in low to high latitudes (Figure 10). [Olsson et al. 1999]
Aze et al. 2011 summary: Cosmopolitan; based on Olsson et al. (1999)

Parasubbotina pseudobulloides has a positive δ18O and negative δ13C similar to Subbotina, Eoglobigerina, and Globanomalina. Both δ18O and δ13C display little size-related variability (D'Hondt and Zachos, 1993; Berggren and Norris, 1997). [Olsson et al. 1999]
Aze et al. 2011 ecogroup 4 - Open ocean sub-thermocline. Based on very light _¹³C and very heavy _¹⁸O. Sources cited by Aze et al. 2011 (appendix S3): D'hondt & Zachos (1993); Berggren & Norris (1997)

This species evolved from 4_-5- chambered, weakly cancellate, spinose morphotypes identified as Parasubbotina sp. aff. pseudobulloides (Olsson et al., 1992, pi. 4: figs. 1-4) that occur at the top of Zone P0 and in Zone Pa. They are not the same as the 5-6-chambered forms identified as G. (T) aff. pseudobulloides by Blow (1979), which he regarded as having a phylogenetic relationship with pseudoinconstans. [Olsson et al. 1999]

Biostratigraphic distribution

Geological Range:
Notes: Uppermost Zone Pa to Zone P3a; ?P3b. [Olsson et al. 1999]
Last occurrence (top): within P3 zone (60.73-62.29Ma, top in Selandian stage). Data source: Olsson et al. 1999
First occurrence (base): within Pa zone (65.72-66.00Ma, base in Danian stage). Data source: Olsson et al. 1999

Primary source for this page: Olsson et al. 1999 - Atlas of Paleocene Planktonic Foraminifera, p. 24

References:

Bang, I. (1969). Planktonic foraminifera and biostratigraphy of the type Danian. In, Brönnimann, P. & Renz, H. H. (eds) Proceedings of the First International Conference on Planktonic Microfossils, Geneva, 1967. E.J. Brill, Leiden (1): 58-65. gs

Berggren, W. A. (1992). Paleogene planktonic foraminifer magnetobiostratigraphy of the southern Kerguelen Plateau (sites 747-749). Proceedings of the Ocean Drilling Program, Scientific Results. 120: 551-568. 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. & Cita, M. B. (1960). Globigerine e Globorotalie del Paleocene di Paderno d'Adda (Italia). Rivista Italiana di Paleontologia e Stratigrafia. LXVI(3): 1-42. gs

Bolli, H. M. (1957d). The genera Globigerina and Globorotalia in the Paleocene-Lower Eocene Lizard Springs Formation of Trinidad. 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: 61-82. gs

Cushman, J. A. (1951). Paleocene Foraminifera of the Gulf Coastal Region of the United States and Adjacent Areas. U.S. Geological Survey Professional Paper. 232: 1-75. gs

Gohrbandt, K. (1963). Zur Gliederung des Palaeogen im Helvetikum nordlich Salzburg nach planktonischen Foraminiferen. Mitteilungen der Geologischen Gesellschaft in Wien. 56(1): 63-. gs

Hillebrandt, A. , von (1962). Das Paleozän und seine Foraminiferenfauna im Becken von Reichenhall und Salzburg. Abhandlungen Bayerischen Akademie der Wissenschaften. 108: 1-182. gs

Loeblich, A. R. & Tappan, H. (1957b). Planktonic foraminifera of Paleocene and early Eocene Age from the Gulf and Atlantic coastal plains. 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: 173-198. gs

Olsson, R. K. (1960). Foraminifera of late Cretaceous and earliest Tertiary age in the New Jersey Coastal Plain. Journal of Paleontology. 34(1): 1-58. gs

Olsson, R. K., Hemleben, C., Berggren, W. A. & Liu, C. (1992). Wall Texture Classification of planktonic foraminifera genera in the Lower Danian. Journal of Foraminiferal Research. 22(3): 195-213. gs

Olsson, R. K., Hemleben, C., Berggren, W. A. & Huber, B. T. (1999). Atlas of Paleocene Planktonic Foraminifera. Smithsonian Institution Press, Washington, DC. (85): 1-252. gs

Plummer, H. J. (1927). Foraminifera of the Midway Formation in Texas. University of Texas Bulletin. 2644: 1-206. gs O

Postuma, J. A. (1971). Manual of planktonic foraminifera. Elsevier for Shell Group, The Hague. 1-406. gs

Shutskaya, E. K. (1953). Raschlenenie kubanskogo i elburganskogo gorizontov Severnogo Kavkaza po globigerinam:. Byulleten Moskovskogo Obshchestva Ispytateley Prirody Otdel Geologicheskiy. 28: 71-79. gs

Subbotina, N. N. (1950). Mikrofauna i stratigrafiya Elburganskogo Gorozonta Goriathego Klyitcha [Microfauna and Stratigraphy of the Elburgan Horizon and the Goryatchy Klijutch Horizon]. In, Mikrofauna of the USSR, 4. Trudy Vsesoyuznego Neftyanogo Nauchno-Issledovatel'skogo Geologo-Razvedochnogo Instituta (VNIGRI) . 51: 5-112. gs

Troelsen, J. C. (1957). Some planktonic Foraminifera of the type Danian and their stratigraphic importance. 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: 125-132. gs

test outline:	Lobate	chamber arrangement:	Trochospiral	edge view:	Concavo-convex	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:	5-6	N.B. These characters are used for advanced search. N/A - not applicable

Parasubbotina pseudobulloides

Taxonomy

Description

Biogeography and Palaeobiology

Biostratigraphic distribution

References:

Add Comment

Comments