Globigerinatheka barri

Classification: pf_cenozoic -> Globigerinidae -> Globigerinatheka -> Globigerinatheka barri
Sister taxa: G. semiinvoluta, G. tropicalis, G. luterbacheri, G. euganea, G. index, G. curryi, G. barri, G. korotkovi, G. kugleri, G. mexicana, G. subconglobata, G. sp.,


Citation: Globigerinatheka barri Bronnimann 1952
Rank: Species
Basionym: Globigerinatheka barri
Taxonomic discussion: In the original drawings of Globigerinatheka barri Bronnimann (1952) the specimen in text-figs. 3d-f does not have bullae, and is more consistent with G. kugleri. Bolli (1972) reported that G. barri is “almost identical” with G. mexicana except for the lack of bullae in the latter. For this reason, he considered barri as a subspecies of G. mexicana. However, as reported above, and in agreement with Blow (1979), G. barri differs from G. mexicana in having a shorter, slightly higher initial spire, sutures that are more depressed and a smaller flatter last chamber.
The specimen identified by Samanta (1970, pl. 2, fig. 16) as G. index shows a coiling mode that is close to that of G. barri, to which it is here attributed, even though it is devoid of bullae. [Premoli Silva et al. 2006]

Catalog entries: Globigerinatheka barri

Type images:

Distinguishing features: Test compact test, nearly globular. Characterized by numerous secondary subcircular apertures with bullae.

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.


Diagnostic characters: Globigerinatheka barri is characterized by its numerous secondary apertures with bullae. It differs from G. mexicana in having fewer chambers in the first whorl which are arranged in a slightly higher trochospire, more depressed sutures throughout the test, and a smaller flatter last chamber which occupies a maximum of one third of the entire test (instead of half of it, as in G. mexicana). Even
though several features, like the secondary apertures, are masked by numerous bullae, G. barri differs from G. kugleri in having the test nearly globular instead of roughly subtriangular, a less lobate and more compact outline, subcircular apertures instead of rather wide low arches, and common bullae with subcircular accessory apertures. [Premoli Silva et al. 2006]

Wall type: Spinose, cancellate; commonly covered by a thick calcite crust. [Premoli Silva et al. 2006]

Test morphology: Subglobular to globular, early chambers in low trochospiral as in Globigerina, later chambers more or less streptospirally coiled, with the larger last chambers tending to envelop the previous whorls and the final chamber frequently enveloping and covering the umbilical area formed by the previous chambers. Sutures depressed, radial. Primary aperture in the early globigerinid stage interiomarginal, umbilical, in later stage single primary aperture may be replaced by multiple, arched, sutural apertures. In the enveloping, final chamber one or more secondary sutural apertures may or may not be covered by bullae of varying size. Each bulla possesses one or more small infralaminal accessory apertures. [Premoli Silva et al. 2006]

Character matrix

test outline:Circularchamber arrangement:Envelopingedge view:Equally biconvexaperture:Umbilical
sp chamber shape:Globularcoiling axis:Lowperiphery:N/Aaperture border:N/A
umb chbr shape:Globularumbilicus:Narrowperiph margin shape:Broadly roundedaccessory apertures:Sutural
spiral sutures:Moderately depressedumb depth:Deepwall texture:Spinoseshell porosity:Macroperforate: >2.5µm
umbilical or test sutures:Moderately 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: Common in low and middle latitudes. [Premoli Silva et al. 2006]
Aze et al. 2011 summary: Low to middle latitudes; based on Premoli Silva et al. (2006)

Isotope paleobiology: No data available. [Premoli Silva et al. 2006]
Aze et al. 2011 ecogroup 1 - Open ocean mixed-layer tropical/subtropical, with symbionts. Based on very heavy δ13C and relatively light δ18O. Sources cited by Aze et al. 2011 (appendix S3): this study

Phylogenetic relations: Saito (1962) and Bolli (1972) suggested that G. barri may have evolved from G. subconglobata. However, Bolli (1972, p. 114) in the reconstruction of the globigerinathekid phylogenetic tree proposed mexicana as ancestral to barri, from which he suggested kugleri evolved; this relationship is rejected here.
[Premoli Silva et al. 2006]

Most likely ancestor: Globigerinatheka subconglobata - at confidence level 3 (out of 5). Data source: Premoli Silva et al. 2006 f7.1.

Biostratigraphic distribution

Geological Range:
Notes: G. barri is confined mainly to the middle Eocene, appearing in the mid-part of Zone E9 and extending up almost to the top of Zone E14. [Premoli Silva et al. 2006]
Last occurrence (top): within E14 zone (35.89-37.99Ma, top in Priabonian stage). Data source: Premoli Silva et al. 2006 f7.1
First occurrence (base): in upper part of E9 zone (60% up, 43.5Ma, in Lutetian stage). Data source: Premoli Silva et al. 2006 f7.1

Plot of occurrence data:

Primary source for this page: Premoli Silva et al. 2006 - Eocene Atlas, chap. 7, p. 177


Baumann, P. (1970). Mikropalaentologische und stratigraphische Untersuchungen der obereozaenen-oligozaenen Scaglia im zentralen Apennin (Italien). Eclogae Geologicae Helvetiae. 63: 1133-1211. 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. (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 :: ::

Bolli, H. M. (1957a). Planktonic foraminifera from the Eocene Navet and San Fernando formations of Trinidad. 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: 155-172. gs :: ::

Bolli, H. M. (1972b). The genus Globigerinatheka Bronnimann. Journal of Foraminiferal Research. 2(3): 109-136. gs :: ::

Bolli, H. M., Loeblich, A. R. & Tappan, H. (1957). Planktonic foraminiferal families Hantkeninidae, Orbulinidae, Globorotaliidae and Globotruncanidae. 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: 3-50. gs :: ::

Brönnimann, P. (1952a). Globigerinoita and Globigerinatheka, new genera from the Tertiary of Trinidad, B.W.I. Contributions from the Cushman Foundation for Foraminiferal Research. 3(1): 25-28. gs :: ::

Cushman, J. A. (1925c). New foraminifera from the Upper Eocene of Mexico. Contributions from the Cushman Laboratory for Foraminiferal Research. 1(3): 4-9. gs :: ::

Eckert, H. R. (1963). Die obereeozaen Globigerinen-Schiefer (Stadund Schimbergerschiefer) zwischen Pilatus und Schrattenfluh. Eclogae Geologicae Helvetiae. 56: 1001-1072. gs :: ::

Finlay, H. J. (1939b). New Zealand foraminifera: Key species in stratigraphy - no. 2. Transactions of the Royal Society of New Zealand. 69(1): 89-128. gs :: ::

Huber, B. T. (1991c). Paleogene and Early Neogene Planktonic Foraminifer Biostratigraphy of Sites 738 and 744, Kerguelen Plateau (Southern Indian Ocean). Proceedings of the Ocean Drilling Program, Scientific Results. 119: 427-449. gs :: ::

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

Loeblich, A. R. & Tappan, H. (1957b). Planktonic foraminifera of Paleocene and early Eocene Age from the Gulf and Atlantic coastal plains. 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: 173-198. gs :: ::

Mohan, M. & Soodan, K. S. (1970). Middle Eocene planktonic foraminiferal zonation of Kutch, India. Micropaleontology. 16: 37-46. 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 :: ::

Poore, R. Z. & Brabb, E. E. (1977). Eocene and Oligocene planktonic foraminifera from the Upper Butano sandstone and type San Lorenzo formation, Santa Cruz Mountains, California. Journal of Foraminiferal Research. 7(4): 249-272. gs :: ::

Postuma, J. A. (1971). Manual of planktonic foraminifera. Elsevier for Shell Group, The Hague. 1-406. gs :: ::

Premoli Silva, I., Wade, B. S. & Pearson, P. N. (2006). Taxonomy, biostratigraphy, and phylogeny of Globigerinatheka and Orbulinoides. 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 7): 169-212. gs :: ::

Pujol, C. (1983). Cenozoic planktonic foraminiferal biostratigraphy of the South-Western Atlantic (Rio Grande Rise): Deep Sea Drilling Project Leg 72. Initial Reports of the Deep Sea Drilling Project. 72: 623-673. gs :: ::

Saito, T. (1962a). Eocene planktonic foraminifera from Hahajima (Hillsborough Island). Transactions and Proceedings of the Paleontological Society of Japan, New Series. 45: 209-225. gs :: ::

Salaj, J. (1980). Microbiostratigraphie du Crétacé et du Paléogène de la Tunisie septentrionale et orientale (Hypostratotypes Tunisiens). Geologicky Ustav Dionyza Stura, Bratislava. 1-238. gs :: ::

Snyder, S. W. & Waters, V. J. (1985). Cenozoic planktonic foraminiferal biostratigraphy of the Goban Spur Region, Deep Sea Drilling Project Leg 80. Initial Reports of the Deep Sea Drilling Project. 80: 439-472. 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 :: ::

Toumarkine, M. (1971). Etude des Foraminifères planctoniques de deux sondages (H-S49 et PGYT-31) dans l’ Eocène de la Montagne du Bakony (Transdanubie, Hongrie). Annales Instituti Geologici Publici Hungarici. 54: 283-299. gs :: ::

Toumarkine, M. (1975). Middle and Late Eocene planktonic foraminifera from the northwestern Pacific Ocean: Leg 32 of the Deep Sea Drilling Project. Initial Reports of the Deep Sea Drilling Project. 32: 735-751. gs :: ::

Toumarkine, M. (1978). Planktonic foraminiferal biostratigraphy of the Paleogene of Sites 360 to 364 and the Neogene of Sites 362A, 363 and 364 Leg 40,. Initial Reports of the Deep Sea Drilling Project. 40: 679-721. gs :: ::

Toumarkine, M. (1983). Les Foraminifères planctoniques de l’Eocène moyen et supérieur des régions tropicales à temperées chaudes. In, p1-219 (ed.) . PhD thesis, Université Pierre et Marie Curie, Paris 6 1-219. gs :: ::

Warraich, M. Y. & Nishi, H. (2003). Eocene planktic foraminiferal biostratigraphy of the Sulaiman range, Indus Basin, Pakistan. Journal of Foraminiferal Research. 33: 219-236. gs :: ::


Globigerinatheka barri compiled by the pforams@mikrotax project team viewed: 4-6-2020

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