Acarinina soldadoensis


Classification: pf_cenozoic -> muricate non-spinose -> Truncorotaloididae -> Acarinina -> Acarinina soldadoensis
Sister taxa: A. medizzai, A. collactea, A. pentacamerata, A. aspensis, A. echinata, A. pseudosubsphaerica, A. alticonica, A. soldadoensis, A. interposita, A. cuneicamerata, A. angulosa, A. africana, A. sibaiyaensis, A. esnehensis, A. mckannai, A. subsphaerica, A. bullbrooki, A. punctocarinata, A. boudreauxi, A. rohri, A. topilensis, A. praetopilensis, > >>

Taxonomy

Citation: Acarinina soldadoensis (Brönnimann 1952)
Rank: Species
Basionym: Globigerina soldadoensis
Synonyms:
Taxonomic discussion: This taxon is characterized by a test composed of 4 to 5 chambers arranged in a relatively loose (lax) coil, resulting in a relatively open and deep umbilicus and moderate to strong lateral chamber compression (giving an angulate appearance to the peripheral margin of some chambers), which culminates in the descendant angulate species angulosa. Acarinina clara Khalilov (1956) from the upper Paleocene of Azerbaizhan exhibits the typical lobulate test and elongated chamber morphology ofA. soldadoensis and is herein regarded as a junior synonym of this species. [Olsson et al. 1999]

Catalog entries: Acarinina clara;
Globigerina soldadoensis;

Type images:

Short diagnosis: Low trochoid, moderately evolute test of 4-5, moderately to strongly muricate, rounded chambers distinctly elongated in the axis of coiling; final chamber often reduced in size; lobulate periphery; deep and relatively wide umbilicus revealing (in some individuals) earlier chambers and their arcuate foramina; sutures on spiral side deep and curved and/or tangential in direction of coiling, chambers often overlapping.

NB The short diagnoses are used in the tables of daughter-taxa to act as quick summaries of the differences between e.g. species of one genus. They have initially been copied from the diagnostic characters/distinguishing features sections of the Eocene and Paleocene Atlases, they will be edited as the site is developed.

Description


Diagnostic characters: Low trochoid, moderately evolute test of 4-5, moderately to strongly muricate, rounded chambers distinctly elongated in the axis of coiling; final chamber often reduced in size; lobulate periphery; deep and relatively wide umbilicus revealing (in some individuals) earlier chambers and their arcuate foramina; sutures on spiral side deep and curved and/or tangential in direction of coiling, chambers often overlapping. [Olsson et al. 1999]

Character matrix

test outline:Lobatechamber arrangement:Trochospiraledge view:Equally biconvexaperture:Umbilical
umb chamber shape:Inflatedcoiling axis:Lowperiphery:N/Aaperture border:N/A
sp chbr shape:Inflatedumbilicus:Wideperiph margin shape:Broadly roundedaccessory apertures:None
umbilical or test sutures:Moderately depressedumb depth:Deepwall texture:-shell porosity:-
spiral sutures:Moderately depresseddiameter mm:width mm:-breadth mm:-
final-whorl chambers:3.0-4.0

Biogeography and Palaeobiology


Geographic distribution: This species has a widespread
geographic distribution from equatorial to subantarctic regions (Figure 20). [Olsson et al. 1999]
Aze et al. 2011 summary: Cosmopolitan; based on Olsson et al. (1999)

Isotope paleobiology: No data available. [Olsson et al. 1999]
Aze et al. 2011 ecogroup 1 - Open ocean mixed-layer tropical/subtropical, with symbionts. Based on very heavy δ13C and relatively light δ18O. Sources cited by Aze et al. 2011 (appendix S3): Pearson et al. (1993, 2001a)

Phylogenetic relations: Acarinina soldadoensis is a sister taxon to A. mckannai from which it differs in being somewhat more evolute and in having more umbilically elongate chambers. [Olsson et al. 1999]

Most likely ancestor: Acarinina mckannai - at confidence level 4 (out of 5). Data source: Berggren et al. (2006) fig9.2.

Biostratigraphic distribution

Geological Range:
Notes: Zone P4c to Zone P9. [Olsson et al. 1999]
The FAD of Acarinina soldadoensis marks the base of zone P4c / top of P4b (Wade et al. 2011)
Last occurrence (top): within E7 zone (45.72-50.20Ma, top in Lutetian stage). Data source: Olsson et al. 1999
First occurrence (base): at base of P4c subzone (0% up, 57.8Ma, in Thanetian stage). Data source: zonal marker (Wade et al. 2011)

Plot of occurrence data:

Primary source for this page: Olsson et al. 1999 - Atlas of Paleocene Planktonic Foraminifera, p. 50

References:

Berggren, W.A., (1971). Paleogene planktonic foraminiferal faunas on Legs I-IV (Atlantic Ocean) JOIDES Deep Sea Drilling Program: a synthesis. In: Farinacci, A. (Editor), Proceedings of the II Planktonic Conference, Roma 1970. Edizioni Tecnoscienza, Rome, pp. 57-77.

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, 1413 pp.

Bolli, H.M., (1957). The genera Globigerina and Globorotalia in the Paleocene-Lower Eocene Lizard Springs Formation of Trinidad. In: Loeblich, A.R., Jr. et al. (Editors), Studies in Foraminifera, U.S. National Museum Bulletin 215. U.S. Government Printing Office, Washington, D.C., pp. 61-82.

Brönnimann, P., (1952). Trinidad Paleocene and lower Eocene Globigerinidae. Bulletin of American Paleontology, 34(143): 1-34.

Hillebrandt von, A., (1962). Das Paleozän und seine Foraminiferenfauna im Becken von Reichenhall und Salzburg. Bayerische Akademie der Wissenschaften Mathematisch-Naturwissenschaftliche Klasse, Abhandlungen, Neue Folge, 108: 1-182.

Khalilov, D.M., (1956). Pelagic foraminifera of the Paleogene deposits of the Azerbaidzhan SSR. Acad. Nauk SSSR Geol., Inst. Trudy, 17(234-261).

Khalilov, D.M., (1956). 0 pelagicheskoy faune foraminifer Paleogenovykh otlozheniy Azerbaydzhana [Pelagic Foraminifera of the Paleogene Deposits of the Azerbaizhan SSR]. Trudy Instituta Geologii, Akademiya Nauk Azerbaidzhanskoi SSR, 17: 234-255.

Olsson, R.K.; Hemleben, C.; Berggren, W.A. & Huber, B.T., (1999). Atlas of Paleocene Planktonic Foraminifera. Smithsonian Contributions to Paleobiology. Smithsonian Institution Press, Washington, DC, 1-252 pp.

Stott, L.D. & Kennett, J.P., (1990). The Paleoceanographic and Paleoclimatic signature of the Cretaceous/Paleogene boundary in the Antarctic: Stable isotopic results from ODP Leg 113. Proceedings of the Ocean Drilling Program, Scientific Results, 113: 829-848.


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Acarinina soldadoensis compiled by the pforams@mikrotax project team viewed: 13-12-2017

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