Subbotina roesnaesensis


Classification: pf_cenozoic -> Globigerinidae -> Subbotina -> Subbotina roesnaesensis
Sister taxa: S. projecta, S. tecta, S. jacksonensis, S. corpulenta, S. eocaena, S. gortanii, S. crociapertura, S. yeguaensis, S. senni, S. roesnaesensis, S. utilisindex, S. angiporoides, S. minima, S. linaperta, S. patagonica, S. cancellata, S. hornibrooki, S. velascoensis, S. triloculinoides, S. triangularis, S. trivialis, S. sp.,

Taxonomy

Citation: Subbotina roesnaesensis Olsson & Berggren, in Olsson et al. 2006
Rank: Species
Basionym: Subbotina roesnaesensis
Synonyms:
Taxonomic discussion: Berggren (1960, text-fig. 8) illustrated a group of “globigerinid” (vel subbotinid) morphotypes in the lower Eocene Røsnaes Clay Formation of Denmark which exhibited a large degree of variation in the arrangement of chambers in the final whorl and the position of the aperture. Similar variation was observed in ‘globigerinids’/subbotinids from equivalent stratigraphic levels in California and in the Caucasus, and this variation was ascribed to intraspecific variation within a single taxon (and subsequently examined quantitatively by Berggren and Kurte½n,1961). This is consistent with our understanding of the morphologic plasticity among living planktonic foraminifera (Hemleben and others, 1989).
This taxon has probably been described and/or recorded under a variety of names and guises in the literature, particularly in the former Soviet Union (for a thorough discussion of the taxonomy of this group see Berggren and Norris, 1997: 46). With the recognition here that the typical patagonica of Todd and Kniker, 1952 possesses a wall texture different (symmetric, coarsely cancellate) from forms that have been ascribed to that species for the past 30 years, it has become necessary to designate a new name - roesnaesensis (which has an asymmetric ruber-wall texture) for them. However, although the illustrations by Shutskaya (1970) of a variable group of subbotinids (Globigerina hevensis, Globigerina rotundaenana, Globigerina elongata, Globigerina contorta, Globigerina sp. 1, Globigerina sp. 2, Globigerina ex. gr. eocaenica) from the Caucasus included by Berggren and Norris (1997) under the name patagonica are generally of high quality, it is not possible to determine whether the different morphotypes consistently possess the asymmetric ruber wall texture for which we have chosen the new name roesnaesensis. For this reason we have refrained from choosing a name for this taxon from among the various morphotypes described by Shutskaya (1970). See Berggren and Norris (1997, p. 45) for further discussion of the possible synonymy of other species. [Olsson et al. 2006]

Catalog entries: Subbotina roesnaesensis, Globigerina contorta, Globigerina elongata Shutskaya, Globigerina hevensis, Globigerina rotundaenana

Type images:

Distinguishing features: Very low trochospiral, lobulate test with 3½-4 rapidly enlarging, ovoid-shaped, loosely embracing chambers, and ruber-type wall texture.

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: Subbotina roesnaesensis is distinguished by its very low trochospiral, lobulate test with 3½-4 rapidly enlarging, ovoid-shaped, loosely embracing chambers, and its ruber-type wall texture. [Olsson et al. 2006]

Test morphology: Type of wall: Normal perforate, spinose, ruber-type wall texture.
Test morphology: Test tripartite, relatively large (0.3-0.55 mm in diameter), very low trochospiral, globular, lobulate in outline, chambers globular, ovoid in shape, wider than high, loosely embracing; in spiral view 3-4 ovoid, loosely embracing chambers in ultimate whorl, increasing rapidly in size, sutures strongly depressed, gently curved on umbilical and spiral sides of the test, ultimate chamber varies in size from reduced to large; in umbilical view 3½-4 globular, loosely embracing chambers, increasing rapidly in size, sutures strongly depressed, straight, umbilicus a fairly large opening, aperture umbilical, a low arch, bordered by a narrow lip that may vary slightly in width, and which is in some instances recessed under a pronounced overhang of the final chamber, ultimate chamber varies in size from reduced to large; in edge view chambers globular in shape, embracing. [Olsson et al. 2006]

Size: Maximum diameter of holotype 0.32 mm, thickness 0.23 mm.

Character matrix

test outline:Lobatechamber arrangement:Trochospiraledge view:Equally biconvexaperture:Umbilical
sp chamber shape:Globularcoiling axis:Lowperiphery:N/Aaperture border:Thin lip
umb chbr shape:Globularumbilicus:Narrowperiph margin shape:Broadly roundedaccessory apertures:None
spiral sutures:Moderately depressedumb depth:Deepwall texture:Spinoseshell porosity:Finely Perforate: 1-2.5µm
umbilical or test sutures:Moderately depressedfinal-whorl chambers:3.5-4.0 N.B. These characters are used for advanced search. N/A - not applicable

Biogeography and Palaeobiology


Geographic distribution: Global in low-to mid latitudes. It occurs in “floods” in Zone E5 (=NP12) in the lower Eocene of California, Denmark, the London Clay of England, in the Nummulites planulatus Sands of Belgium and in the “red clay” facies in the (otherwise flysch-like) sediments of the Hordaland Group, North Sea (where it has been recorded under the name Globigerina ex gr. linaperta by King, 1983 and Murray and others, 1989). In Egypt, this form occurs in the uppermost Paleocene (Zone P5) and lower Eocene (Zones E3-6) of the Esna Shale Formation where it disappears locally during the brief, extreme warmth of the PETM interval. In the Bass River section of coastal plain New Jersey this form has its first occurrence within the PETM. [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 roesnaesensis is derived from Subbotina triangularis (White) in Zone P5. Blow (1979, p. 1261) believed that his morphospecies (Blow’s Subbotina eocaenica? Terquem = S. roesnaesensis Olsson and Berggren n. sp.) represented direct ancestry of Subbotina frontosa (Subbotina) through the concomitant increase in size of the last chamber and lateral translation of a higher arched aperture to a more peripheral position. However, the species frontosa, here placed in Turborotalia, is a nonspinose form unrelated to S. roesnaesensis (see discussion under Turborotalia frontosa). Nevertheless, S. roesnaesensis is regarded as the stem species for the radiation of many middle Eocene species of Subbotina (Fig. 6.2). [Olsson et al. 2006]

Most likely ancestor: Subbotina triangularis - at confidence level 4 (out of 5). Data source: Olsson et al. 2006 f6.2.
Likely descendants: Globigerina officinalis; Subbotina eocaena; Subbotina senni; Subbotina yeguaensis;

Biostratigraphic distribution

Geological Range:
Notes: Zone P5 (lower part) to Zone E10. [Olsson et al. 2006]
Last occurrence (top): within E10 zone (41.89-43.23Ma, top in Lutetian stage). Data source: Eocene Atlas
First occurrence (base): within P5 zone (55.96-57.10Ma, base in Thanetian stage). Data source: Eocene Atlas

Plot of occurrence data:

Primary source for this page: Olsson et al. 2006 - Eocene Atlas, chap. 6, p. 157

References:

Berggren, W. A. & Norris, R. D. (1997). Biostratigraphy, phylogeny and systematics of Paleocene trochospiral planktonic foraminifera. Micropaleontology, Supplement 1. 43: 1-116. gs

Berggren, W. A. (1960). Some planktonic foraminifera from the Lower Eocene (Ypresian) of Denmark and northwestern Germany. Stockholm University, Contributions to Geology. 5: 41-108. 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. 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

Cushman, J. A. (1925d). Some new foraminifera from the Velasco shale of Mexico. Contributions from the Cushman Laboratory for Foraminiferal Research. 1(6): 18-23. gs

Hemleben, C., Spindler, M. & Anderson, O. (1989). Modern Planktonic Foraminifera. Springer-Verlag, New York. -. gs

Huber, B. T. (1991c). Paleogene and Early Neogene Planktonic Foraminifer Biostratigraphy of Sites 738 and 744, Kerguelen Plateau (Southern Indian Ocean). Proceedings of the Ocean Drilling Program, Scientific Results. 119: 427-449. gs

King, C. (1983). Cainozoic micropalaeontological biostratigraphy of the North Sea:. Report of the Institute of Geological Sciences. 87: 1-40. gs

Lu, G. & Keller, G. (1995). Planktic foraminiferal faunal turnovers in the subtropical Pacific during the Late Paleocene to Early Eocene. Journal of Foraminiferal Research. 25: 97-116. gs

Murray, J. W., Curry, D., Haynes, J. R. & King, C. (1989). Palaeogene. In, Jenkins, D. G. & Murray, J. W. (eds) Stratigraphical Atlas of Fossil Foraminifera. Ellis Horwood Limited, Chichester 228-267. gs

Olsson, R. K., Hemleben, C., Huber, B. T. & Berggren, W. A. (2006b). Taxonomy, biostratigraphy, and phylogeny of Eocene Globigerina, Globoturborotalita, Subbotina, and Turborotalita. 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 6): 111-168. gs

Terquem, O. (1882). Les foraminiferes de l’Eocene des environs de Paris. Mem Soc Geol France ser.3. 2(3): 1-193. gs

Todd, R. & Kniker, H. T. (1952). An Eocene foraminiferal fauna from the Agua Fresca shale of Magallanes Province, southernmost Chile. Cushman Foundation for Foraminiferal Research, Special Publication. no. 1: 1-28. 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

Warraich, M. Y., Ogasawara, K. & Nishi, H. (2000). Late Paleocene to early Eocene planktic foraminiferal blostratigraphy of the Dungan Formation, Sulaiman Range, central Pakistan. Paleontological Research. 4(4): 275-301, 218 figures, 273 aendices. gs

Weinzierl, L. L. & Applin, E. R. (1929). The Claiborne Formation on the Coastal Domes. Journal of Paleontology. 3(4): 384-410. gs


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Subbotina roesnaesensis compiled by the pforams@mikrotax project team viewed: 11-11-2019

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