Acarinina angulosa


Classification: pf_cenozoic -> muricate non-spinose -> Truncorotaloididae -> Acarinina -> Acarinina angulosa
Sister taxa: A. africana, A. alticonica, A. angulosa, A. aspensis, A. boudreauxi, A. bullbrooki, A. coalingensis, A. collactea, A. cuneicamerata, A. echinata, A. esnaensis, A. esnehensis, A. interposita, A. mcgowrani, A. mckannai, A. medizzai, A. nitida, > >>

Taxonomy

Citation: Acarinina angulosa (Bolli 1957)
Rank: Species
Basionym: Globigerina soldadoensis angulosa
Synonyms:
Taxonomic discussion: This distinctive taxon is a common component of lower Eocene (sub)tropical assemblages where it is associated with other acarininids (soldadoensis, interposita, pentacamerata, pseudotopilensis) and morozovellids (subbotinae, formosa, gracilis, aragonensis). In the course of our studies in Egypt we have found that this taxon has its FAD just below the base of the CIE / PETM interval, i.e., within the uppermost part of Zone P5 (as redefined in Berggren and Pearson, 2005). [Berggren et al. 2006]

Catalog entries: Globigerina soldadoensis angulosa;

Type images:

Short diagnosis: The diagnostic features of Acarinina angulosa are the strongly angular disposition of the chambers of the last whorl and the strongly lobulate peripheral outline.

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: The diagnostic features of Acarinina angulosa are the strongly angular disposition of the chambers of the last whorl and the strongly lobulate peripheral outline. [Berggren et al. 2006]

Wall type: Muricate, normal perforate, nonspinose. [Berggren et al. 2006]

Test morphology: Low trochospiral test with lobulate peripheral outline; about 10-12 chambers in 2½ whorls; 4½-5 subangular chambers in last whorl gradually increasing in size, separated by straight, radial and depressed sutures; spiral side flat to slightly convex, sutures curved/oblique; umbilicus moderately wide, open, deep; aperture a low interiomarginal-umbilical arch extending nearly to the periphery; axial/edge view subangular. [Berggren et al. 2006]

Size: Maximum diameter of holotype 0.40mm, thickness 0.28 mm. [Berggren et al. 2006]

Character matrix

test outline:Lobatecoiling axis:Lowchamber arrangement:Trochospiralumbilicus:Wide
edge view:Inequally biconvexumbilical or test sutures:Strongly depressedspiral sutures:Strongly depressedshell porosity:Finely Perforate: 1-2.5
wall texture:Moderately muricateaperture:Interiomarginalaperture border:N/Aaccessory apertures:None
periphery:N/Aumb chamber shape:Inflatedsp chbr shape:Inflatedperiph margin shape:Subangular
umb depth:Deepdiameter mm:0.4width mm:breadth mm:0.28
final-whorl chambers:4.5-5.0

Biogeography and Palaeobiology


Geographic distribution: Ranges from tropical to temperate regions; Arabian Sea, north Pacific Ocean (DSDP Site 47), New Jersey Coastal Plain (Bass River), Tethyan deposits of northern Africa (Egypt) and occurrences in Spain (Alicante Province) and New Guinea. [Berggren et al. 2006]
Aze et al. 2011 summary: Low to middle latitudes; based on Berggren et al. (2006b)

Isotope paleobiology: No data available. [Berggren et al. 2006]
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): this study

Phylogenetic relations: This species evolved from Acarinina soldadoensis in uppermost Zone P5 and probably gave rise to A. cuneicamerata. [Berggren et al. 2006]

Biostratigraphic distribution

Geological Range:
Notes: Zone P5 (uppermost part) to Zone E7. Note that the Paleocene part of the range was not recorded by Olsson and others (1999). [Berggren et al. 2006]
Last occurrence (top): within E7 zone (45.72-50.20Ma, 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: Berggren et al. 2006 - Atlas of Eocene Planktonic Foraminifera, chapter 9, p. 263

References:

Belford, D.J., (1984). Tertiary foraminifera and age of sediments, Ok Tedi-Wabag, Papua New Guinea. Bureau of Mineral Resources, Australia, Bulletin, 216: 1-52.

Berggren, W.A. & Pearson, P.N., (2005). A revised tropical to subtropical Paleogene planktonic foraminiferal zonation. Journal of Foraminiferal Research.

Berggren, W.A.; Pearson, P.N.; Huber, B.T. & Wade, B.S., (2006). Taxonomy, biostratigraphy, and phylogeny of Eocene Acarinina. In: Pearson, P.N. et al. (Editors), Atlas of Eocene Planktonic Foraminifera, Cushman Foundation Special Publication 41. Allen Press, Lawrence, Kansas, pp. 257-326.

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. 97-124.

Bolli, H.M., (1957). Planktonic foraminifera from the Eocene Navet and San Fernando formations 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. 155-172.

Fleisher, R.L., (1974). Cenozoic planktonic foraminifera and biostratigraphy, Arabian Sea, Deep Sea Drilling Project, Leg 23A. Initial Reports of the Deep Sea Drilling Project, 23: 1001-1072.

Hillebrandt, A., von, (1965). Los foraminiferos planctonicos, nummulitidos y coccolitoforidos de la zona de Globorotalia palmerae del Cuisiense (Eoceno Inferior) en el SE de España, (provincias de Murcia y Alicante). Revista Española de Micropaleontología, 8: 323-394.

Samuel, O.; Borza, K. & Kohler, E., (1972). Microfauna and lithostratigraphy of the Paleogene and adjacent Cretaceous of the Middle Vah Valley (West Carpathian)


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Acarinina angulosa compiled by the pforams@mikrotax project team viewed: 27-7-2017

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