Dentoglobigerina globularis


Classification: pf_cenozoic -> Globigerinidae -> Dentoglobigerina -> Dentoglobigerina globularis
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 globularis (Bermúdez, 1961)
Rank: species
Basionym: Globoquadrina globularis Bermúdez, 1961
Synonyms:
Taxonomic discussion:

The holotype is illustrated here for the first time in SEM. Blow (1969, 1979) illustrated two metatypes from Cuba provided to him by Bermúdez. However, these specimens do not agree well with the type series; here we regard the first as probably referable to Dentoglobigerina globosa and the second as uncertain. Fortunately, most subsequent authors seem to have based their concept on the type illustrations. Fleisher (1974:1024) placed globularis in taxonomic context by suggesting a phylogenetic transition from galavisi to globularis to globosa, eventually leading to the common Miocene species altispira. This lineage has been accepted by several authors, including this study. [Wade et al. 2018]

Catalog entries: Globoquadrina globularis

Type images:

Distinguishing features: Like D. galavisi but larger, more open coiling with 3½-4 chambers in the whorl (vs. 3-3½), more open umbilicus, less embracing chambers, and slightly higher spire.

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 globularis is distinguished from its ancestral form D. galavisi by its larger adult size, more open coiling with 3½-4 chambers in the whorl (compared to 3-3½ in galavisi), more open umbilicus, less embracing chambers, and slightly higher spire. This species resembles D. prasaepis and D. pseudovenezuelana in several of these respects, but prasaepis lacks an umbilical tooth and pseudovenezuelana has a more compact test, a heavily pustulose umbilical area and ragged, pustulose tooth. It is distinguished from Subbotina projecta n. sp. by having more compressed and closely appressed chambers. See under globosa for means of distinguishing this species. [Wade et al. 2018]


Wall type: Normal perforate, probably spinose in life.

Test morphology: Test large, globular, medium trochospiral, lobulate in equatorial outline; in spiral view chambers ovate, 3½-4 in final whorl, increasing moderately in size, sutures moderately depressed, straight; in umbilical view chambers ovate, slightly embracing, 3½-4 in final whorl, sutures moderately depressed, straight, ultimate chamber may be reduced in size, directed over the umbilicus; umbilicus open, square, aperture umbilical; the lip or tooth is highly variable; in edge view, chambers globular to ovate, ultimate chamber directed over umbilicus. [Wade et al. 2018]

Size: Maximum diameter of holotype 0.62 mm, maximum thickness approximately 0.40 mm. [Wade et al. 2018]

Character matrix

test outline:Lobatechamber arrangement:Trochospiraledge view:Concavo-convexaperture:Umbilical
sp chamber shape:Globularcoiling axis:Moderate-highperiphery:N/Aaperture border:Thin flange
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:3.5-4.0 N.B. These characters are used for advanced search. N/A - not applicable

Biogeography and Palaeobiology


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

Isotope paleobiology: Biolzi (1983) indicated that it was a mixed-layer dweller although the species was not illustrated. Wade and others (2007) showed variable isotopic ratios. [Wade et al. 2018]

Phylogenetic relations: According to Fleisher (1974) and subsequent authors, this species evolved from galavisi and gave rise to globosa. [Wade et al. 2018]

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

Biostratigraphic distribution

Geological Range:
Notes: This species ranges through the entire Oligocene. Although not included in the Atlas of Eocene Planktonic Foraminifera, we now consider the first occurrence to have been in the uppermost Eocene (Zone E16 equivalent), as illustrated by Leckie and others (1993) from the western North Atlantic Ocean. The uppermost confirmed occurrence is from lower Miocene Zone M1 (Quilty, 1976). [Wade et al. 2018]
Last occurrence (top): within M1a subzone (22.44-22.96Ma, top in Aquitanian stage). Data source: Wade et al. 2018 f11.1
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.350

References:

Akers, W. H. (1955). Some planktonic foraminifera of the American Gulf Coast and suggested correlations with the Caribbean Tertiary. Journal of Paleontology. 29(4): 647-664. gs

Bermudez, P. J. (1961). Contribucion al estudio de las Globigerinidea de la region Caribe-Antillana (Paleoceno-Reciente). Editorial Sucre, Caracas. 1119-1393. gs

Biolzi, M. (1983). Stable isotopic study of Oligocene-Miocene sediments from DSDP Site 354, equatorial Atlantic. Marine Micropaleontology. 8: 121-139. 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

Gümbel, C. W. (1868). Beiträge zur Foraminiferenfauna der nordalpinen, älteren Eocängebilde oder der Kressenberger Nummulitenschichten. Abhandlungen der K. Bayerische Akademie der Wissenschaften, Cl. II,. 10(2): 579-730. gs

Hernitz Kucenjak, M., Premec Fucek, V., Slavkovic, R. & Mesic, I. A. (2006). Planktonic foraminiferal biostratigraphy of the late Eocene and Oligocene in the Palmyride area, Syria. Geologia Croatica. 59: 19-39. 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., McGowran, B. & James, N. P. (2003b). Eocene–Oligocene planktonic forminiferal biostratigraphy of Sites 1126, 1130, 1132, and 1134, ODP Leg 182, Great Australian Bight. Proceedings of the Ocean Drilling Program, Scientific Results. 182: 1-28. gs

Pearson, P. N. & Wade, B. S. (2009). Taxonomy and stable isotope paleoecology of well-preserved planktonic foraminifera from the uppermost Oligocene of Trinidad. Journal of Foraminiferal Research. 39: 191-217. gs

Quilty, P. G. (1976). Planktonic foraminifera DSDP Leg 34, Nazca Plate. Initial Reports of the Deep Sea Drilling Project. 34: 629-703. 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., Berggren, W. A. & Olsson, R. K. (2007). The biostratigraphy and paleobiology of Oligocene planktonic foraminifera from the Equatorial Pacific Ocean (ODP Site 1218). Marine Micropaleontology. 62: 167-179. 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

Weinzierl, L. L. & Applin, E. R. (1929). The Claiborne Formation on the Coastal Domes. Journal of Paleontology. 3(4): 384-410. gs


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

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