Dentoglobigerina tapuriensis


Classification: pf_cenozoic -> Globigerinidae -> Dentoglobigerina -> Dentoglobigerina tapuriensis
Sister taxa: D. juxtabinaiensis, D. binaiensis, D. sellii, D. tapuriensis, D. baroemoenensis, D. larmeui, D. galavisi, D. altispira, D. globosa, D. globularis, D. prasaepis, D. pseudovenezuelana, D. taci, D. tripartita, D. eotripartita, D. venezuelana, D. sp.,

Taxonomy

Citation: Dentoglobigerina tapuriensis (Blow & Banner 1962)
Rank: Species
Basionym: Globigerina tripartita tapuriensis Blow & Banner 1962
Synonyms:
Taxonomic discussion:

This species was described by Blow and Banner (1962) from Tanzania. The holotype was illustrated in SEM by Pearson and Wade (2015) for the first time, along with a range of comparable specimens from drill sites in Tanzania. The species is generally quite rare, but has been reliably recorded from the lower Oligocene from all the major ocean basins. [Wade et al. 2018]

Catalog entries: Globigerina tripartita tapuriensis

Type images:

Distinguishing features: 3 compressed chambers in final whorl.
Umbilicus elliptical, deep; with thin 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


Diagnostic characters:

Dentoglobigerina tapuriensis is distinguished from its ancestor, D. taci, by its broader, more radially compressed final chamber, and by generally having fewer chambers in the final whorl and a narrower apertural lip. Like D. taci, it seems never to have an umbilical tooth. It is distinguished from its probable descendant, D. sellii, by having more lobate outline and less flattened umbilical face. [Wade et al. 2018]


Wall type: Cancellate and probably spinose in life. [Wade et al. 2018]

Test morphology: Test large, chambers globular, arranged in a moderate trochospiral, outline oval, chambers moderately to strongly radially compressed; in spiral view 3, occasionally up to 3½ appressed and embracing chambers in final whorl, increasing rapidly in size, sutures straight to slightly curved, weakly depressed; in umbilical view 3, occasionally up to 3½ globular and appressed chambers in final whorl, increasing rapidly in size, sutures incised, straight or slightly curved, umbilicus wide, oval, and deep; aperture umbilical, a wide arch, centrally placed usually with a thin lip of constant thickness; in edge view chambers globular in shape, embracing, the final chamber leaning over the umbilicus. [Wade et al. 2018]

Size: Maximum of holotype 0.73 mm. [Wade et al. 2018]

Character matrix

test outline:Lobatechamber arrangement:Trochospiraledge view:Equally biconvexaperture:Umbilical
sp chamber shape:Globularcoiling axis:Moderateperiphery:N/Aaperture border:Thin lip
umb chbr shape:Globularumbilicus:Narrowperiph margin shape:Broadly roundedaccessory apertures:None
spiral sutures:Moderately depressedumb depth:Deepwall texture:Cancellateshell porosity:Finely Perforate: 1-2.5µm
umbilical or test sutures:Strongly depressedfinal-whorl chambers:0.0-0.0 N.B. These characters are used for advanced search. N/A - not applicable

Biogeography and Palaeobiology


Geographic distribution: Global in low to mid-latitudes. [Wade et al. 2018]

Isotope paleobiology: No data available. [Wade et al. 2018]

Phylogenetic relations: Blow (1969) suggested an evolutionary lineage from tripartitatapuriensisselliibinaiensis. While we agree with the tapuriensisselliibinaiensis evolutionary line, we now regard D. galavisi as the more likely ancestral form evolving through the intermediate D. taci. [Wade et al. 2018]

Most likely ancestor: Dentoglobigerina galavisi - at confidence level 2 (out of 5). Data source: Wade et al. 2018.
Likely descendants: Dentoglobigerina sellii;

Biostratigraphic distribution

Geological Range:
Notes: This species ranges through the entire Oligocene. Most authors have regarded it as originating in the basal Oligocene, but Wade and Pearson (2008) and Pearson and Wade (2015) recorded its lowest occurrence in the uppermost Eocene (Zone E15/E16). Spezzaferri and Premoli Silva (1991) recorded its highest occurrence in Subzone P21b. However, one of the specimens illustrated by Leckie and others (1993), on their pl. 5, fig. 14, is from upper Oligocene Zone P22, and we have observed and here illustrate specimens from Zone O7 of the western North Atlantic Ocean. [Wade et al. 2018]
Last occurrence (top): within O7 zone (22.96-25.21Ma, top in Aquitanian stage). Data source: Wade et al. 2018
First occurrence (base): within E16 zone (33.90-34.68Ma, base in Priabonian stage). Data source: Wade et al. 2018

Plot of occurrence data:

Primary source for this page: Wade et al. 2018 - Olig Atlas chap.11 p.367;

References:

Blow, W. H. & Banner, F. T. (1962). The mid-Tertiary (Upper Eocene to Aquitanian) Globigerinaceae. In, Eames, F. E. , Banner, F. T. , Blow, W. H. & Clarke, W. J. (eds) Fundamentals of mid-Tertiary Stratigraphical Correlation. Cambridge University Press, Cambridge 61-151. gs

Blow, W. H. (1969). Late middle Eocene to Recent planktonic foraminiferal biostratigraphy. In, Bronnimann, P. & Renz, H. H. (eds) Proceedings of the First International Conference on Planktonic Microfossils, Geneva, 1967. E J Brill, Leiden 380-381. gs

Blow, W. H. (1979). The Cainozoic Globigerinida: A study of the morphology, taxonomy, evolutionary relationships and stratigraphical distribution of some Globigerinida (mainly Globigerinacea). E. J. Brill, Leiden. 2: 1-1413. gs

Fleisher, R. L. (1974a). Cenozoic planktonic foraminifera and biostratigraphy, Arabian Sea, Deep Sea Drilling Project, Leg 23A. Initial Reports of the Deep Sea Drilling Project. 23: 1001-1072. gs

Jenkins, D. G. & Orr, W. N. (1972). Planktonic foraminiferal biostratigraphy of the east equatorial Pacific--DSDP Leg 9. Initial Reports of the Deep Sea Drilling Project. 9: 1059-1193. gs

Koch, R. (1926). Mitteltertiare Foraminiferen aus Bulongan, Ost-Borneo. Eclogae Geologicae Helvetiae. 19(3): 722-751. gs

Leckie, R. M., Farnham, C. & Schmidt, M. G. (1993). Oligocene planktonic foraminifer biostratigraphy of Hole 803D (Ontong Java Plateau) and Hole 628A (Little Bahama Bank), and comparison with the southern high latitudes. Proceedings of the Ocean Drilling Program, Scientific Results. 130: 113-136. gs

Li, Q., Jian, Z. & Su, X. (2005). Late Oligocene rapid transformations in the South China Sea. Marine Micropaleontology. 54: 5-25. gs

Pearson, P. N. & Wade, B. S. (2015). Systematic taxonomy of exceptionally well-preserved planktonic foraminifera from the Eocene/Oligocene boundary of Tanzania. Cushman Foundation for Foraminiferal Research, Special Publication. 45: 1-85. gs

Spezzaferri, S. & Premoli Silva, I. (1991). Oligocene planktonic foraminiferal biostratigraphy and paleoclimatic interpretation from Hole 538A, DSDP Leg 77, Gulf of Mexico. Palaeogeography, Palaeoclimatology, Palaeoecology. 83: 217-263. gs

Spezzaferri, S. (1994). Planktonic foraminiferal biostratigraphy and taxonomy of the Oligocene and lower Miocene in the oceanic record. An overview. Palaeontographia Italica. 81: 1-187. gs

Wade, B. S. & Pearson, P. N. (2008). Planktonic foraminiferal turnover, diversity fluctuations and geochemical signals across the Eocene/Oligocene boundary in Tanzania. Marine Micropaleontology. 68: 244-255. gs

Wade, B. S., Pearson, P. N., Olsson, R. K., Fraass, A. J., Leckie, R. M. & Hemleben, C. (2018c). Taxonomy, biostratigraphy, and phylogeny of Oligocene and Lower Miocene Dentoglobigerina and Globoquadrina. In, Wade, B. S. , Olsson, R. K. , Pearson, P. N. , Huber, B. T. & Berggren, W. A. (eds) Atlas of Oligocene Planktonic Foraminifera. Cushman Foundation for Foraminiferal Research, Special Publication. 46(Chap 11): 331-384. gs


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Dentoglobigerina tapuriensis compiled by the pforams@mikrotax project team viewed: 6-12-2019

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