Globanomalidae


Classification: pf_cenozoic -> Globanomalidae
Sister taxa: Globigerinidae, Globorotalidae, Hantkeninidae, Truncorotaloididae, Globanomalidae, Hastigerinidae, Globigerinitidae, Candeinidae, Guembelitrioidea, Benthic origins, hidden,
Daughter taxa: (blue => in age window 0-300Ma) Granddaughter taxa
Very low trochospiral; 5-6 chambers in final whorl; chamber-shape variable.
Aperture interiomarginal, umbilical-extraumbilical, arch with narrow lip.
Wall smooth, normally perforate, pustules in some species.

Low to very low trochospiral. Chambers globular, 5-8 in final whorl. Umbilicus small & deep.
Aperture low to high arch, with narrow lip.
Normal perforate wall, smooth to heavily pustulose, nonspinose.

Planispiral, compressed, loosely coiled, numerous chambers in final whorl, last 1-3 chambers uncoiling.
Aperture equatorial, oval-shaped with broad lip.

Planispiral.
Aperture equatorial, sometimes bipartite, may be asymmetrical.
Wall smooth, normally perforate.

Trochospiral with umbilical-extraumbilical aperture.
Wall smooth pustulose, can be weakly cancellate, & may defoliate.

Taxonomy

Citation: Globanomalidae Loeblich and Tappan, 1961
Rank: Family
Type species: Globanomalina Haque, 1956
Synonyms:
Taxonomic discussion:

Loeblich and Tappan (1984; see also Loeblich and Tappan 1988) erected the Family Globanomalinidae to unite Globanomalina with forms ancestral to the Hantkeninidae (e.g. Clavigerinella) that were then considered to be directly related to each other. Subsequent research (Coxall and others, 2003) has disproved this link.

In the Atlas of Eocene Planktonic Foraminifera, the Family Globanomalinidae was not recognized and the genera that are included in this work were assigned to the Hedbergellidae (Olsson and Hemleben, 2006; Pearson and others, 2006a). Recent work on Cretaceous Hedbergella (especially wall microstructure studies) has revealed complexities in the phylogeny that casts significant doubt on a direct link between true Hedbergella from the Aptian (type species Anomalina lorneiana trochoidea Gandolfi, 1942) and later forms that have traditionally been included in Hedbergella, including the Maastrichtian ancestors of Paleocene Globanomalina (Huber and Leckie, 2011:61). Fundamental revisions to the Mesozoic suprageneric classification are likely to be implemented by the Mesozoic Planktonic Foraminifera Working Group (Huber and Leckie, 2011:61) which may include a restriction of Family Hedbergellidae (B.T. Huber, personal communication, 2011). For this reason the Family Globanomalinidae is resurrected and emended herein to include Globanomalina and all its descendant forms (Pseudohastigerina, Planoglobanomalina, and Turborotalia).[Pearson et al. 2018]

Catalog entries: Globanomalidae [not in catalog yet]

Type images:

Distinguishing features: Hedbergellids - trochospiral, mostly low trochospiral. Apertures of earlier formed chambers remain visible around the umbilicus.

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 trochospiral with umbilical-extraumbilical aperture with a prominent lip. Apertures of earlier formed chambers remain visible around the umbilicus. [Olsson et al. 1999]

Biogeography and Palaeobiology

Biostratigraphic distribution

Geological Range:
Last occurrence (top): in upper part of Rupelian Stage (62% up, 30.3Ma, in Rupelian stage). Data source: Total of range of species in this database
First occurrence (base): at base of Maastrichtian Stage (0% up, 72.1Ma, in Maastrichtian stage). Data source: Total of range of species in this database

Plot of occurrence data:

Primary source for this page: Olsson & Hemleben 2006 - Eocene Atlas, chap. 14, p. 415

References:

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

Olsson, R.K. & Hemleben, C., (2006). Taxonomy, biostratigraphy, and phylogeny of Eocene Globanomalina, Planoglobanomalina n. gen and Pseudohastigerina. In: Pearson, P.N. et al. (Editors), Atlas of Eocene Planktonic Foraminifera. Cushman Foundation Special Publication. 41 Allen Press, Lawrence, Kansas, pp. 413-432.

Pearson, P.N.; Olsson, R.K.; Spezzaferri, S. & Leckie, R.M., (2018). Taxonomy, biostratigraphy, and phylogeny of Oligocene Globanomalinidae (Turborotalia and Pseudohastigerina). In: Wade, B.S. et al. (Editors), Atlas of Oligocene Planktonic Foraminifera. Cushman Foundation for Foraminiferal Research Special Pulbication. 46, pp. 403-415.


logo

Globanomalidae compiled by the pforams@mikrotax project team viewed: 15-12-2018

Taxon Search:
Advanced Search
Short stable page link: http://mikrotax.org/pforams/index.php?id=100167Go 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