Tenuitella clemenciae


Classification: pf_cenozoic -> Globigerinitidae -> Tenuitella -> Tenuitella clemenciae
Sister taxa: T. iota, T. fleisheri, T. parkerae, T. clemenciae, T. angustiumbilicata, T. munda, T. gemma, T. praegemma, T. patefacta, T. insolita, T. sp.,

Taxonomy

Citation: Tenuitella clemenciae (Bermudez, 1967)
Rank: species
Basionym: Turborotalia clemenciae Bermudez, 1967
Synonyms: Globorotalia (Tenuitella) clemenciae (Bermudez, 1967)[e.g. Kennett & Srinivasan 1983]
Taxonomic discussion: "Gr. minutissima, described from the Miocene of Trinidad by Bolli (1957a), closely resembles Gr. (Te.) clemenciae, and these two may be conspecific. If this is the case, Gr. minutissima has priority. Because we did not examine the type specimens of Globorotalia minutissima, we were unable to arrive at a definite conclusion." [Kennett & Srinivasan 1983]

Catalog entries: Turborotalia clemenciae, Globorotalia minutissima

Type images:

Distinguishing features: Like T. munda but larger, 5 chambers in final whorl, and a more flattened lip

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


Test morphology: Test small, low trochospiral , equatorial periphery lobulate, axial periphery rounded, chambers subglobular to ovate, five in the final whorl, increasing moderately in size; sutures on spiral side radial to slightly curved, depressed, on umbilical side radial , depressed; surface smooth, usually covered with small pustules or crystallites (Pl. 39, Figs. 1,3); umbilicus small, shallow; aperture a low arch , bordered by a lip; interiomarginal, umbilical-extraumbilical. [Kennett & Srinivasan 1983]

Character matrix

test outline:Lobatechamber arrangement:Trochospiraledge view:Equally biconvexaperture:Extraumbilical-peripheral
sp chamber shape:Globularcoiling axis:Lowperiphery:N/Aaperture border:Thin lip
umb chbr shape:Globularumbilicus:Narrowperiph margin shape:Broadly roundedaccessory apertures:None
spiral sutures:Moderately depressedumb depth:Shallowwall texture:Finely pustuloseshell porosity:Microperforate: <1µm
umbilical or test sutures:Strongly 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 to warm subtropical. [Kennett & Srinivasan 1983]

Phylogenetic relations: Gr. (Te.) clemenciae closely resembles Gr. (Te.) munda but differs by its larger size and by having five chambers in the final whorl and a more flattened lip. [Kennett & Srinivasan 1983]

Most likely ancestor: Tenuitella munda - at confidence level 2 (out of 5). Data source: Kennett & Srinivasan 1983, fig. 18, p1.61.
Likely descendants: Dentigloborotalia anfracta;

Biostratigraphic distribution

Geological Range:
Last occurrence (top): within N17b zone (5.72-6.60Ma, top in Messinian stage). Data source: Kennett & Srinivasan 1983
First occurrence (base): within N5 zone (17.59-21.12Ma, base in Aquitanian stage). Data source: Kennett & Srinivasan 1983

Plot of occurrence data:

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

References:

Bolli, H. M. (1957b). Planktonic foraminifera from the Oligocene-Miocene Cipero and Lengua formations of Trinidad, B.W.I. In, Loeblich, A. R. , Jr. , Tappan, H. , Beckmann, J. P. , Bolli, H. M. , Montanaro Gallitelli & E. Troelsen, J. C. (eds) Studies in Foraminifera. U.S. National Museum Bulletin. 215: 97-123. gs

Jenkins, D. G. (1971). New Zealand Cenozoic Planktonic Foraminifera. New Zealand Geological Survey, Paleontological Bulletin. 42: 1-278. gs

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


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Tenuitella clemenciae compiled by the pforams@mikrotax project team viewed: 17-10-2019

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Short stable page link: http://mikrotax.org/pforams/index.php?id=104233 Go to Archive.is to create a permanent copy of this page - citation notes



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