Dentoglobigerina galavisi


Classification: pf_cenozoic -> Globigerinidae -> Dentoglobigerina -> Dentoglobigerina galavisi
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 galavisi (Bermudez 1961)
Rank: Species
Basionym: Globigerina galavisi
Synonyms:
Taxonomic discussion:

Bermúdez (1961) described this species from the upper Eocene of Mississippi, and also recorded having observed it in coeval formations of Cuba, Trinidad and Mexico. Brönnimann and Resig (1971) recorded it from the Pacific Ocean for the first time, pointing out some of its distinctive features such as the flattened spiral side, radially compressed chambers, and thin, plate-like lip. However, other authors (e.g., Stainforth, 1974, and Bolli and Saunders, 1985) regarded it as a synonym of Globigerina yeguaensis Weinzierl and Applin, which we include here in Subbotina. Blow (1979) first recognized it as a distinct and important morphotype within a wider taxonomic scheme, but he operated a very broad taxonomic concept, including in it very globular specimens we now assign to various species of Subbotina. A more stable and restricted morphological concept was applied by Olsson and others (2006) and Pearson and Wade (2015). According to this taxonomy, Dentoglobigerina galavisi was probably the first species of the genus to evolve, in the middle Eocene, and it is also the name-bearing type. It gave rise to a range of other forms from the middle Eocene through to the Oligocene. Whereas Olsson and others (2006) regarded it as nonspinose, and suggested a possible ancestry in Acarinina, Pearson and Wade (2015) illustrated a possible spine hole in a specimen from Tanzania (reproduced in Plate 11.5, Fig. 14), and we here show another specimen (Plate 11.5, Fig. 16) from the Adriatic Sea with possible spine stumps in spine bases, hence we now consider it more likely that galavisi evolved from a spinose subbotinid ancestor. Blow (1979, pl. 191, figs. 8, 9) illustrated two unusual specimens that show transitional features between the genera Subbotina and Dentoglobigerina from middle Eocene Zone P13 (= E12) of Tanzania. Despite searching, we have not been able to find similar specimens in our own material of approximately this age; we tentatively regard them as possible phylogenetically primitive galavisi. The occurrence and diversity of the earliest dentoglobigerinids in the middle Eocene requires further study, and there is an intriguing possibility that the genus evolved during the climatic perturbation of the Middle Eocene Climatic Optimum. [Wade et al. 2018]

Catalog entries: Globigerina galavisi

Type images:

Distinguishing features: 3 moderately compressed chambers in final whorl.
Umbilicus broadly triangular; with asymmetrical narrow tooth.

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:

It is the root-stock of the evolutionary radiation of dentoglobigerinids: see under eotripartita, globularis, larmeui, pseudovenezuelana, and taci, for means of distinguishing those species. It is distinguished from most species of Subbotina by its more quadrate shape, more appressed and radially compressed chambers, and the tendency for the final chamber to bend over the umbilicus (features which it shares with most other Dentoglobigerina). [Wade et al. 2018]

The species is characterized by its oval-shaped chambers that surround the umbilicus, the bending and flattening of the ultimate chamber into the umbilicus, and the umbilically confined aperture with an irregular, triangular-shaped lip that projects over the umbilical opening. [Olsson et al. 2006]


Wall type: Cancellate, honeycomb, normal perforate, probably spinose in life. [Wade et al. 2018]

Test morphology: Test trochospiral, globular, oval to quadrate in equatorial outline, chambers globular; in spiral view 3½ ovoid chambers in ultimate whorl, increasing rapidly in size, sutures moderately depressed, straight to slightly curved; in umbilical view 3-3½ ovoid chambers increasing rapidly in size, sutures deeply incised, straight; umbilicus small, enclosed by surrounding chambers, aperture centered over the umbilicus, bordered by a thin irregular, triangular-shaped lip that is centered below an ill-defined apertural face; in edge view chambers ovoid in shape, projecting over the umbilicus, ultimate chamber shows a distinct bending and flattening into the umbilicus forming an indistinct umbilical face (modified from Olsson and others, 2006). [Wade et al. 2018]

Size: Maximum diameter of holotype 0.46 mm, thickness 0.40 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:Thick flange
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:3.0-3.5 N.B. These characters are used for advanced search. N/A - not applicable

Biogeography and Palaeobiology


Geographic distribution: [Wade et al. 2018]

Isotope paleobiology: Oxygen and carbon isotope data indicate a deep-dwelling habitat for this species (Pearson and others, 2001; Wade and Pearson, 2008). Earlier reports of relatively negative δ18O (Douglas and Savin, 1978; Poore and Matthews, 1984; van Eijden and Ganssen, 1995) may refer to a different species concept. Eocene δ11B data (Pearson and Palmer, 1999) confirm a thermocline dwelling habitat. [Wade et al. 2018]

Phylogenetic relations: This species may have evolved from a subbotinid ancestor (possibly Subbotina yeguaensis) in in the middle Eocene and became the rootstock of a minor evolutionary radiation, giving rise to several other species. [Wade et al. 2018]

Most likely ancestor: Subbotina yeguaensis - at confidence level 1 (out of 5). Data source: Wade et al. 2018.
Likely descendants: Dentoglobigerina eotripartita; Dentoglobigerina globularis; Dentoglobigerina larmeui; Dentoglobigerina pseudovenezuelana; Dentoglobigerina taci; Dentoglobigerina tapuriensis;

Biostratigraphic distribution

Geological Range:
Notes: Dentoglobigerina galavisi first occurs in the middle Eocene, probably Zones E10/E11, though further work is required to constrain its evolutionary first occurrence. This species was illustrated from middle Eocene Zone E12 by Krasheninnikov and Hoskins (1973), who recorded its first appearance at that level. It was also questionably recorded from the same zone by Blow (1979, pl. 191, figs. 8, 9) (see discussion above). Miller and others (1991) calibrated the first occurrence to Chron C16n (upper Eocene) at DSDP Site 612, northwest Atlantic Ocean; and it is from the upper Eocene and Oligocene that most reliable occurrences have been recorded.

The uppermost datum may be difficult to define precisely because of intergradation with D. larmeui, which has been regarded as a closely related species since the work of Bermúdez (1961) and Brönnimann and Resig (1971). Krasheninnikov and Hoskins (1973) suggested a highest occurrence in the ‘middle’ Oligocene Paragloborotalia opima Zone. Spezzaferri and Premoli Silva (1991) recorded a range extending to the upper part of Zone P22, overlapping with the range of Paragloborotalia pseudokugleri (= upper Oligocene Zone O7) (see also Spezzaferri, 1994). Pearson and Chaisson (1997) recorded a range into the lower Miocene at Ceara Rise, Atlantic Ocean, but no specimens were illustrated. Here we show a specimen (Pl. 11.5, Fig. 4) from lower Miocene Zone M1 from ODP Site 904, western North Atlantic Ocean.

[Wade et al. 2018]
Last occurrence (top): within M1a subzone (22.44-22.96Ma, top in Aquitanian stage). Data source: Wade et al. 2018 f1.1
First occurrence (base): within E10 zone (41.89-43.23Ma, base in Lutetian 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.345; Olsson et al. 2006 - Eocene Atlas, chap. 13, p. 403

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

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

Brönnimann, P. & Resig, J. (1971). A Neogene globigerinacean biochronologic time-scale of the southwestern Pacific. Initial Reports of the Deep Sea Drilling Project. 7(2): 1235-1469. gs

Douglas, R. G. & Savin, S. M. (1978). Oxygen isotopic evidence for the depth stratification of Tertiary and Cretaceous foraminifera. Palaeogeography, Palaeoclimatology, Palaeoecology. 3: 175-196. gs

Fleisher, R. (1975). Oligocene planktonic foraminiferal biostratigraphy, central North Pacific Ocean, DSDP Leg 32. Initial Reports of the Deep Sea Drilling Project. 32: 753-763. gs

Jenkins, D. G. (1960). Planktonic foraminifera from the Lakes Entrance oil shaft, Victoria, Australia. Micropaleontology. 6: 345-371. gs

Krasheninnikov, V. A. & Hoskins, R. H. (1973). Late Cretaceous, Paleogene and Neogene Planktonic Foraminifera. Initial Reports of the Deep Sea Drilling Project. 20: 105-203. gs

Miller, K. G., Berggren, W. A., Zhang, J. & Palmer-Julson, A. A. (1991). Biostratigraphy and isotope stratigraphy of upper Eocene microtektites at Site 612: how many impacts?. Palaios. 6: 17-38. gs

Nishi, H. & Chaproniere, G. C. H. (1994). Eocene-Oligocene subtropical planktonic foraminifers at Site 841,. Proceedings of the Ocean Drilling Program, Scientifc Results. 135: 245-266. gs

Olsson, R. K., Hemleben, C. & Pearson, P. N. (2006a). Taxonomy, biostratigraphy, and phylogeny of Eocene Dentoglobigerina. In, Pearson, P. N. , Olsson, R. K. , Hemleben, C. , Huber, B. T. & Berggren, W. A. (eds) Atlas of Eocene Planktonic Foraminifera. Cushman Foundation for Foraminiferal Research, Special Publication. 41(Chap 13): 401-412. gs

Pearson, P. N. & Chaisson, W. P. (1997). Late Paleocene to middle Miocene planktonic foraminifer biostratigraphy, Ceara Rise. Proceedings of the Ocean Drilling Program, Scientific Results. 33-68. gs

Pearson, P. N. & Palmer, M. R. (1999). Middle Eocene seawater pH and atmospheric carbon dioxide concentrations. Science. 284: 1824-1826. 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

Pearson, P. N. et al. (2001a). Warm tropical sea surface temperatures in the Late Cretaceous and Eocene epochs. Nature. 413: 481-487. gs

Poag, C. W. & Commeau, J. A. (1995). Paleocene to middle Miocene planktic foraminifera of the southwestern Salisbury Embayment, Virginia and Maryland: Biostratigraphy, allostratigraphy, and sequence stratigraphy. Journal of Foraminiferal Research. 25: 134-155. gs

Poore, R. Z. & Bybell, L. M. (1988). Eocene to Miocene biostratigraphy of New Jersey Core ACGS #4: Implications for regional stratigraphy. U.S. Geological Survey Bulletin. 1829: 1-41. gs

Poore, R. Z. & Matthews, R. K. (1984). Oxygen isotope ranking of late Eocene and Oligocene planktonic foraminifers: implications for Oligocene sea-surface temperatures and global ice-volume. Marine Micropaleontology. 9: 111-134. 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

Stainforth, R. M. (1974). Nomenclature of some large Eo-Oligocene Globigerinas, in Jung, P. (ed.), Contributions to the geology and paleobiology of the Caribbean and adjacent areas. Verhandlungen der Naturforschenden Gesellschaft in Basel. 84: 256-263. gs

van Eijden, A. J. M. & Ganssen, G. M. (1995). An Oligocene multi-species foraminiferal oxygen and carbon isotope record from ODP Hole 758A (Indian Ocean): paleoceanographic and paleo-ecologic implications. Marine Micropaleontology. 25: 47-65. gs

van Eijden, A. J. M. & Smit, J. (1991). Eastern Indian Ocean Cretaceous and Paleogene quantitative biostratigraphy. Proceedings of the Ocean Drilling Program, Scientific Results. 121: 77-123. 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

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

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