Truncorotaloididae


Classification: pf_cenozoic -> Truncorotaloididae
Sister taxa: Globigerinidae, Globorotaliidae, Hantkeninidae, Truncorotaloididae, Globanomalidae, Hastigerinidae, Globigerinitidae, Candeinidae, Guembelitrioidea, Benthic origins, hidden,
Daughter taxa: (blue => in age window 0-800Ma) Granddaughter taxa


Moderate to low trochospire; chambers ovoid, usually 4-6 in final whorl.
Wall muricate with pustules on umbilical shoulders;

Test very low trochospiral, usually 5-6, globular to oval chambers in last whorl, periphery lobulate;
Wall non-spinose, weakly cancellate;

Test biconvex
Test small, biconvex, evolute, margin narrowly rounded or angular, sometimes with a keel; 5-6 chambers in final whorl
Wall, coarsely cancellate, praemuricate, often pustulose.

small Morozovellids with biconvex–planoconvex tests with an overall rounded periphery

Biconvex, keeled test with densely perforate surface

Low trochospiral test with keel-spines

Test plano-convex
Test typically plano-convex, chambers strongly anguloconical.
Wall strongly pustulose (muricate) on parts of spire and umbilicus. Most species with muricocarina.

Like Morozovella, but derived from Acarinina.

Taxonomy

Citation: Truncorotaloididae Loeblich and Tappan, 1961
Rank: Family
Taxonomic discussion: This family tentatively includes Acarinina, Igorina, Morozovella, and Praemurica. As discussed in "Phylogeny," there are two views among the working group members on the relationships between these genera (see Figure 5a, b). The use of this family appears appropriate, for the time being, until these differences are resolved. [Olsson et al. 1999]

Catalog entries: Truncorotaloididae

Distinguishing features: Muricate

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: Test, a low to moderately elevated trochospire, with or without peripheral keel; chambers globular to conical shaped; wall cancellate to muricate, pustule growth moderate to heavy, usually around umbilical area or along a peripheral keel; aperture interiomarginal, umbilical-extraumbilical, with or without lip, may have supplementary apertures. [Berggren et al. in Olsson et al. 1999]

Biogeography and Palaeobiology

Biostratigraphic distribution

Geological Range:
Last occurrence (top): at base of Aquitanian Stage (3% up, 23Ma, in Aquitanian stage). Data source: Total of range of species in this database
First occurrence (base): within Danian Stage (61.61-66.04Ma, base in Danian stage). Data source: Total of range of species in this database

Plot of occurrence data:

Primary source for this page: Berggren et al. 2006 - Eocene Atlas, chap. 9, p. 261

References:

Banner, F. T. (1989). The nature of Globanomalina Haque, 1956. Journal of Foraminiferal Research. 19: 171-179. gs

Berggren, W. A., Pearson, P. N., Huber, B. T. & Wade, B. S. (2006b). Taxonomy, biostratigraphy, and phylogeny of Eocene Acarinina. 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 9): 257-326. gs

Loeblich, A. R. & Tappan, H. (1961). Cretaceous planktonic foraminifera: Part I-Cenomanian. Micropaleontology. 7: 257-304. gs


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Truncorotaloididae compiled by the pforams@mikrotax project team viewed: 21-11-2019

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Short stable page link: http://mikrotax.org/pforams/index.php?id=100308 Go to Archive.is to create a permanent copy of this page - citation notes



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