Dentoglobigerina globosa


Classification: pf_cenozoic -> Globigerinidae -> Dentoglobigerina -> Dentoglobigerina globosa
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 globosa (Bolli, 1957)
Rank: species
Basionym: Globoquadrina altispira globosa Bolli, 1957
Synonyms:

(Note: This synonymy list is restricted to taxonomically important works and Oligocene occurrences)

Taxonomic discussion:

The holotype of D. globosa is from the lower Miocene, and Bolli’s original concept was that globosa was a more globular subspecies of D. altispira. The paratype (Pl. 11.6, Figs. 5-7) appears to be a juvenile specimen and may not belong to this species. Fleisher (1974) suggested that D. globosa was the ancestral form to altispira, and was itself derived from globularis in the Oligocene. We regard Globoquadrina pozonensis Blow as a junior synonym. [Wade et al. 2018]

Catalog entries: Globoquadrina altispira globosa, Globoquadrina pozonensis

Type images:

Distinguishing features: Like D. globularis but with 5-6 chambers in the final whorl leading to a more lobulate outline; also wider umbilicus.

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:

This species is distinguished from D. globularis by having more chambers in the final whorl leading to a more lobulate outline, a wider umbilicus, and from D. altispira by its more rounded chambers. [Wade et al. 2018]


Wall type: Cancellate, probably spinose in life.

Test morphology: Moderately elevated trochospiral, globular, lobulate; in spiral view 5-6 globular, slightly embracing chambers in final whorl increasing slowly in size, ultimate chamber may be reduced in size, sutures straight, moderately depressed; in umbilical view 5-6 globular, slightly embracing chambers in final whorl increasing slowly in size, may have a reduced final chamber, umbilicus open, medium size, aperture umbilical, usually bordered by a sharp triangular shaped umbilical tooth, sutures straight, moderately depressed; in edge view very moderately elevated trochospiral, oval, rounded in outline. [Wade et al. 2018]

Size: Maximum diameter of holotype 0.44 mm, minimum diameter 0.39 mm, thickness 0.32 mm. [Wade et al. 2018]

Character matrix

test outline:Lobatechamber arrangement:Trochospiraledge view:Spiroconvexaperture:Umbilical
sp chamber shape:Globularcoiling axis:Highperiphery:N/Aaperture border:Teeth
umb chbr shape:Globularumbilicus:Wideperiph 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:5.0-6.0 N.B. These characters are used for advanced search. N/A - not applicable

Biogeography and Palaeobiology


Geographic distribution: Widespread in low to mid-latitudes, but more common at low latitudes (Spezzaferri, 1994). [Wade et al. 2018]

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

Phylogenetic relations: Descended from D. globularis and ancestral to D. altispira according to Fleisher (1974) and various subsequent authors. [Wade et al. 2018]

Most likely ancestor: Dentoglobigerina globularis - at confidence level 4 (out of 5). Data source: Wade et al. 2018.
Likely descendants: Dentoglobigerina altispira;

Biostratigraphic distribution

Geological Range:
Notes: According to Fleisher (1974) this species first appeared in Zone P21. The oldest confirmed illustrated occurrence is from Spezzaferri (1994) from Subzone P21b (Zone O5). It persists through much of the Miocene and possibly part of the Pliocene (e.g., Chaisson and Leckie, 1993); the highest occurrence has not been determined in this study. [Wade et al. 2018]
Last occurrence (top): within Early Pliocene Sub-Epoch (3.60-5.33Ma, top in Zanclean stage). Data source: Kennett & Srinivasan 1983 f20
First occurrence (base): within O5 zone (26.93-28.09Ma, base in Chattian stage). Data source: Wade et al. 2018 f11.1

Plot of occurrence data:

Primary source for this page: Wade et al. 2018 - Olig Atlas chap.11 p.348; Kennett& Srinivasan 1983 p 189

References:

Blow, W. H. (1959). Age, correlation, and biostratigraphy of the upper Tocuyo (San Lorenzo) and Pozon Formations, eastern Falcon, Venezuela. Bulletins of American Paleontology. 39(178): 67-251. gs

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

Chaisson, W. P. & Leckie, R. M. (1993). High-resolution Neogene planktonic foraminifer biostratigraphy of Site 806, Ontong Java Plateau (Western Equatorial Pacific). Proceedings of the Ocean Drilling Program, Scientific Results. 130: 137-178. 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

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

Stainforth, R. M., Lamb, J. L., Luterbacher, H., Beard, J. H. & Jeffords, R. M. (1975). Cenozoic planktonic foraminiferal zonation and characteristics of index forms. University of Kansas Paleontological Contributions. 62: 1-425. 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 globosa compiled by the pforams@mikrotax project team viewed: 6-12-2019

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