Globoturborotalita

NB TAXA WHICH ORIGINATE IN THE OLIGOCENE ARE NOT INCLUDED YET
Classification: pf_neogene -> Globigerinidae -> Globoturborotalita
Sister taxa: Beella, Globigerina, Globigerinella, Protentella, Globigerinoides, Globigerinoidesella, Globoturborotalita, Orbulina, Praeorbulina, Sphaeroidinella, Sphaeroidinellopsis, Trilobatus, Turborotalita, Catapsydrax, Clavatorella, Paragloborotalia, Orcadia,

Distinguishing features: Trochospiral test with a single, large, open umbilical aperture. Cancellate wall.

Daughter taxa: (blue => in age window 0-300Ma)
Like G. woodi but with very large aperture
Like G. woodi but subquadrate test and aperture placed directly opposite the suture line
Like G. woodi but compact test and more highly arched aperture

decoraperta->rubescens->tenella lineage
Like G. rubescens but with a small, supplementary aperture.
Like G. decoraperta but very small and with small circular aperture.
Like G. woodi but higher-spired test
bolli->kennetti lineage
Like Gs. bolli but only 3 to 3½ chambers in final whorl (vs. 4), less-embracing chambers, and more subquadrate outline
Small, compact,  aperture almost circular. Supplementary sutural aperture on spiral side
druryi->nepenthes lineage
Like G. druryi but with protruding thumb-shaped final chamber
Small, compact test, with coarse-pitted surface, and small, rimmed, aperture
Specimens which cannot be assigned to established species

Taxonomy

Citation: Globoturborotalita Hofker 1976
Rank: Genus
Type species: Globigerina rubescens
Synonyms:
Taxonomic discussion: Kennett & Srinivasan (1983) proposed a new subgenus Zeaglobigerina for Neogene Globigerina species with a cancellate wall. This concept is now standard but the name Globoturborotalita Hofker 1976 is used as it is a senior synonym.
The genus is strongly paraphyletic giving rise to Globigerinioides, Trilobatus (and thus Orbulina), Turborotalita, and Sphaeroidinella according to the phylogeny of Aze et al. 2011.

Catalog entries: Globigerina (Zeaglobigerina); Globoturborotalita;

Type images:

Distinguishing features: Trochospiral test with a single, large, open umbilical aperture. Cancellate wall.

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


Test morphology: Includes species characterized by a cancellate surface with regular subhexagonal pore pits with pores at the centers (Pi. 4, Fig. 2). Thus, the surface of Globoturborotalita appears distinctly cancellate in contrast to the hispid appearance of Globigerina. Although the surface ultrastructure of Globoturborotalita is similar to Globigerinoides saccullfer, which is spinose during life, no indication of spines or spine bases was observed in Globoturborotalita species. We consider that the genus Globoturborotalita is the ancestor of Globigerinoides sacculifer, which evolved via Globoturborotalita connecta and Globigerinoides triloba. [Kennett & Srinivasan 1983 - but with references to Globigerina (Zeaglobigerina) changed to Globoturborotalita]

Biogeography and Palaeobiology

Biostratigraphic distribution

Geological Range:
Last occurrence (top): Extant Data source: Total of range of species in this database
First occurrence (base): at base of Chattian Stage (0% up, 28.1Ma, in Chattian stage). Data source: Total of range of species in this database

Plot of occurrence data:

References:

Aze, T.; Ezard, T.H.G.; Purvis, A.; Coxall, H.K.; Stewart, D.R.M.; Wade, B.S. & Pearson, P.N.P., (2011). A phylogeny of Cenozoic macroperforate planktonic foraminifera from fossil data. Biological Reviews, 86: 900-927.

Bolli, H.M., (1957). Planktonic foraminifera from the Oligocene-Miocene Cipero and Lengua formations of Trinidad, B.W.I. In: Loeblich, A.R., Jr. et al. (Editors), Studies in Foraminifera: U.S. National Museum Bulletin 215. U.S. Government Printing Office, Washington, DC, pp. 97-123.

Hofker, J., (1976). La famille Turborotalitidae. Revue de Micropaléontologie, 19: 47-53.

Kennett, J.P. & Srinivasan, M.S., (1983). Neogene Planktonic Foraminifera. Hutchinson Ross Publishing Co., Stroudsburg, Pennsylvania, 1-265 pp.


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Globoturborotalita compiled by the pforams@mikrotax project team viewed: 16-8-2018

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