pforams@mikrotax - Dentigloborotalia anfracta pforams@mikrotax - Dentigloborotalia anfracta

Dentigloborotalia anfracta


Classification: pf_cenozoic -> Genera incertae sedis -> Dentigloborotalia -> Dentigloborotalia anfracta
Sister taxa: D. anfracta, D. sp.


3D models from The Foraminarium, hosted on sketchfab

Taxonomy

Citation: Dentigloborotalia anfracta (Parker, 1967)
taxonomic rank: species
Basionym: Globorotalia anfracta Parker, 1967
Synonyms:
Taxonomic discussion: A distinct species found abundantly in the plankton and in sediments, but recorded rarely because of its small size (Brummer, 1988b). When recognized, the species concept is mostly applied consistently (Saito et al., 1981). Holotype from recent sediments represents the typical morphology with reniform chambers. [Brummer & Kucera 2022]

Catalog entries: Globorotalia anfracta

Type images:

Distinguishing features:
Parent taxon (Dentigloborotalia): Smooth wall, with shark-tooth like pustules; kidney-shaped chambers:
This taxon: 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


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:Finely Perforate: 1-2.5µm
umbilical or test sutures:Moderately depressedfinal-whorl chambers:4-5 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]

Map of distribution from ForCenS database

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:

Brummer, G-J. A. & Kucera, M. (2022). Taxonomic review of living planktonic foraminifera. Journal of Micropalaeontology. 41: 29-74. gs

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

Meilland, J., Cornuault, P., Morard, Raphaël, Brummer, Geert-J. A. & Kucera, M. (2022). Identification guide to extant planktonic foraminifera. Part 1: Family Candeinidae and genera Berggrenia, Bolivina, Dentigloborotalia, and Neogallitellia. ICES Identification Leaflets for Plankton. 196: 1-22. 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

Saito, T., Thompson, P. R. & Breger, D. (1981). Systematic Index of Recent and Pleistocene Planktonic Foraminifera. University of Tokyo Press, Tokyo. 1-190. gs

Siccha, M. & Kucera, M. (2017). ForCenS, a curated database of planktonic foraminifera census counts in marine surface sediment samples. Scientific Data. 4(1): 1-12. gs


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Dentigloborotalia anfracta compiled by the pforams@mikrotax project team viewed: 15-4-2024

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Comments (3)

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Süheyla(Turkey)

Hello,

Is this species Dentigloborotalia anfracta?

Avatar
Geert-Jan Brummer(Malta)

Hi Suheyla. That is a weird specimen but not anfracta as I know it.

Best, Geert-Jan

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Süheyla(Turkey)

Hi Geert-Jan,

Yes, it is weird, mixed my mind :) Thank you very much for the answer.

Best wishes,

Süheyla