Acarinina soldadoensis


Classification: pf_cenozoic -> muricate non-spinose -> Truncorotaloididae -> Acarinina -> Acarinina soldadoensis
Sister taxa: << < A. esnehensis, A. interposita, A. mcgowrani, A. mckannai, A. medizzai, A. nitida, A. pentacamerata, A. praetopilensis, A. primitiva, A. pseudosubsphaerica, A. pseudotopilensis, A. punctocarinata, A. quetra, A. rohri, A. sibaiyaensis, A. soldadoensis, A. strabocella, A. subsphaerica, A. topilensis, A. wilcoxensis, A. sp.,

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]

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:

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

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.


logo

Acarinina soldadoensis compiled by the pforams@mikrotax project team viewed: 22-10-2017

Taxon Search:
Advanced Search
AphiaID: 735236 Nomenclatural data on WoRMS
Go to Archive.is to create a permanent copy of this page - citation notes



Comments (0)

No comments yet. Be the first!

Add Comment

* Required information
1000
Captcha Image
Powered by Commentics