Dentigloborotalia anfracta


Classification: pf_cenozoic -> Globorotaliidae -> Dentigloborotalia -> Dentigloborotalia anfracta
Sister taxa: D. anfracta, D. sp.,

Taxonomy

Citation: Dentigloborotalia anfracta (Parker, 1967)
Rank: species
Basionym: Globorotalia anfracta Parker, 1967
Synonyms:

Catalog entries: Globorotalia anfracta,

Type images:

Distinguishing features: monospecific

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: Coiling direction (in extant population): mixed

Test morphology: Test small, very low trochospiral, spiral side almost flat, lobulate in equatorial profile; axial profile rounded, the final cham- ber somewhat compressed; chambers inflated four to five in the final whorl, increasing slowly as added; sutures on spiral side and umbilical side radial and depressed; surface smooth, translucent, covered with fine pustules. Aperture a low arch with a broad lip. [Kennett & Srinivasan 1983]

Size: <150µm

Character matrix

test outline:Lobatechamber arrangement:Trochospiraledge view:Inequally biconvexaperture:Umbilical-extraumbilical
sp chamber shape:Globularcoiling axis:Lowperiphery:N/Aaperture border:Thick lip
umb chbr shape:Globularumbilicus:Narrowperiph margin shape:Moderately roundedaccessory apertures:None
spiral sutures:Moderately depressedumb depth:Shallowwall texture:Smoothshell porosity:Macroperforate: >2.5µm
umbilical or test sutures:Moderately depressedfinal-whorl chambers:4.0-5.0 N.B. These characters are used for advanced search. N/A - not applicable

Biogeography and Palaeobiology


Geographic distribution: Tropical [Kennett & Srinivasan 1983]

In modern oceans an abundant, temperate water, species [SCOR WG138]


Phylogenetic relations: Gr. (Te.) anfracta is distinguished from Gr. ( Te. ) clemenciae by its thin, almost translucent test, flat spiral side, and rather compressed final chamber in peripheral view. Gr. (Te.) anfracta is the modern representative of the Tenuitella lineage and seems to have developed from Gr. (Te.) clemenciae in the Late Miocene. [Kennett & Srinivasan 1983]

Most likely ancestor: Tenuitella clemenciae - at confidence level 3 (out of 5). Data source: Kennett & Srinivasan 1983, fig 18.

Biostratigraphic distribution

Geological Range:
Last occurrence (top): Extant Data source: present in the plankton (SCOR WG138)
First occurrence (base): within N18 zone (5.20-5.72Ma, base in Messinian stage). Data source: Kennett & Srinivasan 1983

Plot of occurrence data:

Primary source for this page: Kennett & Srinivasan 1983, p.164

References:

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

Parker, F. L. (1967). Late Tertiary biostratigraphy (planktonic foraminifera) of tropical Indo-Pacific deep-sea cores. Bulletins of American Paleontology. 52(235): 115203-. gs


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Dentigloborotalia anfracta compiled by the pforams@mikrotax project team viewed: 21-7-2019

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Short stable page link: http://mikrotax.org/pforams/index.php?id=104024 Go to Archive.is to create a permanent copy of this page - citation notes



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