pforams@mikrotax - Globoconella inflata

Citation: Globoconella inflata (d’Orbigny, 1839)

Basionym: Globigerina inflata d’Orbigny, 1839

Synonyms:

Globorotalia (Turborotalia) inflata (d Orbigny) - e.g. Banner & Blow 1967
Globorotalia (Globoconella) inflata (d’Orbigny, 1839) - e.g. Kennett & Srinivasan 1983
Globorotalia inflata (d’Orbigny, 1839) - e.g. Schiebel & Hemleben 2017, Brummer & Kucera 2022
Globorotalia inflata praeinflata Maiya, Saito, & Sato 1976 [according to Lam & Leckie 2020]
Neoacarinina blowi Thompson 1973 = Globorotalia blowi [according to Brummer & Kucera 2022]

Variants:

Globorotalia oscitans Todd 1958 small compact form confined to the Mediterranean [according to Kennett & Srinivasan 1983, Brummr & Kucera 2022]
Globigerina nipponica Asano 1957- form with dimiutive final chamber [according to Brummr & Kucera 2022]

Taxonomic discussion: We follow Lam & Leckie (2020) in separating G. triangula as a discrete species, rather than a synonym or sub-species of G. inflata. [editor's comment - JRY 2022]

Brummer & Kucera (2022) argue that Neoacarinina Thompson 1973 is likely to be a senior synonym of Globoconella, and so nomenclatural revision may be needed. Consequently they retain G. inflata in Globorotalia.

Distinguishing features:
Parent taxon (Globoconella): Globorotaliids having a high-arched aperture
This taxon: Like Gr. (G.) puncticulata but <4 chambers in final whorl, greater test inflation, a broadly rounded periphery, and a larger, high-arched, aperture.

Description

Test low trochospiral, 3 to 3½ subglobular chambers in the final whorl, periphery broadly rounded, chambers more inflated on umbilical side than on spiral side, increasing uniformly in size as added; spiral sutures curved, depressed, on umbilical side almost radial, depressed; surface covered with low, rounded tubercles and smooth, thick cortex as in Pulleniatina; umbilicus narrow; aperture wide, high arch, interiomarginal, umbilical-extraumbilical with an indistinct rim. [Kennett & Srinivasan 1983]

Non-spinose; Cancellate [Aze 2011]

Biogeography and Palaeobiology

Sub-antarctic to warm subtropical areas. [Kennett & Srinivasan 1983] Low to high latitudes [Aze et al. 2011, based on Kennett & Srinivasan (1983)]

In modern oceans an abundant, temperate water, species [SCOR WG138]

Map of distribution from ForCenS database

Aze et al. 2011 ecogroup 3 - Open ocean thermocline. Based on light δ¹³C and relatively heavy δ¹⁸O Cited sources (Aze et al. 2011 appendix S3): Vergnaud-Grazzini (1976)

Gr. (G.) inflata is distinguished from Gr. (G.) puncticulata by usually having 3 to 3½ chambers in the final whorl, greater test inflation, a broadly rounded periphery, and a large, high-arched aperture.
Gr. (G.) puncticulata evolved during the Late Pliocene into Gr. (G.) inflata by a reduction in the number of chambers in the final whorl and an increase in degree of inflation of the chambers (Kennett and Vella, 1975; Malmgren and Kennett, 1981). Gr. (G.) inflata is the end member of the continuously evolving lineage of Globoconella, and its evolutionary first appearance marks a valuable datum.
Globorotalia triangula Theyer and Globorotalia oscitans Todd are closely related forms. Maiya et al. (1976), from studies in the Japanese section, postulated an alternate phylogeny for Gr. (G.) inflata, from Gr. adamantea to Gr. orientalis to Gr. inflata praeinflata. Because of our clear and measured observations of gradation from Gr. puncticulata to Gr. inflata (see Malmgren and Kennett, 1981), the meaning of the lineage devised by Maiya et al. (1976) is unclear. [Kennett & Srinivasan 1983]

Molecular Genotypes recognised (data from PFR² database, June 2017. References: Morard et al. 2011; Morard et al. 2013; Ujiié & Lipps 2009).

Globoconella inflata (84 sequences)
Globoconella inflata I (44 sequences)
Globoconella inflata II (25 sequences)

Most likely ancestor: Globoconella puncticulata - at confidence level 3 (out of 5). Data source: Kennett & Srinivasan 1983, fig. 13, Wei 1994, fig.1.

Biostratigraphic distribution

Geological Range:
Last occurrence (top): Extant. Data source: present in the plankton (SCOR WG138)
First occurrence (base): within PL5 [Atl.] zone (2.39-3.13Ma, base in Piacenzian stage). Data source: Wei 1994 (quoted age converted to modern zone)

References:

Bandy, O. L. (1975). Messinian evaporite deposition and the Miocene/Pliocene boundary, Pasquasia-Capodarso Sections, Sicily. In, Saito, T. & Burckle, L. H. (eds) Late Neogene Epoch Boundaries. American Museum Natural History Micropaleontology Press, New York 49-63. gs

Banner, F. T. & Blow, W. H. (1967). The origin, evolution and taxonomy of the foraminiferal genus Pulleniatina Cushman, 1927. Micropaleontology. 13(2): 133-162. gs

Brummer, G-J. A. & Kucera, M. (2022). Taxonomic review of living planktonic foraminifera. Journal of Micropalaeontology. 41: 29-74. gs

d'Orbigny, A. (1839b). Foraminifères des Iles Canaries. In, Barker-Webb, P. & Berthelot, S. (eds) Histoire naturelle des Iles Canaries. 120-146. gs

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

Kennett, J. P. & Vella, P. (1975). Late Cenozoic planktonic foraminifera and Paleoceanography at DSDP site 284 in the cool subtropical South Pacific. Initial Reports of the Deep Sea Drilling Project. 29: 769-799. gs

Lam, A. & Leckie, R. M. (2020a). Late Neogene and Quaternary diversity and taxonomy of subtropical to temperate planktic foraminifera across the Kuroshio Current Extension, northwest Pacific Ocean. Micropaleontology. 66(3): 177-268. gs

Maiya, S., Saito, T. & Sato, T. (1976). Late Cenozoic planktonic foraminiferal biostratigraphy of northwest Pacific sedimentary sequences. In, Takayanagi, Y. & Saito, T. (eds) Progress in Micropaleontology. Micropaleontology Press, New York 395-422. gs

Malmgren, B. A. & Kennett, J. P. (1981). Phyletic gradualism in a Late Cenozoic planktonic foraminiferal lineage; DSDP site 284, southwest Pacific. Paleobiology. 7(2): 230-240. gs

Morard, R., Quillévéré, F., Douady, C. J., de Vargas, C., de Garidel-Thoron, T. & Escarguel, G. (2011). Worldwide genotyping in the planktonic foraminifer Globoconella inflata: Implications for life history and paleoceanography. PLoS One. 6: e26665-. gs

Morard, R., Quillévéré, F., Escarguel, G. & Garidel-thoron, T. D. (2013). Ecological modeling of the temperature dependence of cryptic species of planktonic foraminifera in the Southern Hemisphere. Palaeogeography Palaeoclimatology Palaeoecology. 391: 13-33. gs

Schiebel, R. & Hemleben, C. (2017). Planktic Foraminifers in the Modern Ocean. Springer-Verlag, Heidelberg. 1-358. gs

Siccha, M. & Kucera, M. (2017). ForCenS, a curated database of planktonic foraminifera census counts in marine surface sediment samples. Scientific Data. 4(1): 1-12. gs

Ujiié, Y. & Lipps, J. H. (2009). Cryptic diversity in planktonic foraminifera in the northwest Pacific ocean. Journal of Foraminiferal Research. 39: 145-154. gs

Vergnaud-Grazzini, C. (1976). Non-equilibrium isotopic compositions of shells of planktonic foraminifera in the Mediterranean Sea. Palaeogeography Palaeoclimatology Palaeoecology. 20: 263-276. gs

Wei, K. -Y. (1994b). Stratophenetic tracing of phylogeny using SIMCA pattern recognition technique: a case study of the late Neogene planktic foraminifera Globoconella clade. Paleobiology. 20(1): 52-65. gs

test outline:	Subquadrate	chamber arrangement:	Trochospiral	edge view:	Planoconvex	aperture:	Umbilical-extraumbilical
sp chamber shape:	Crescentic	coiling axis:	Low	periphery:	N/A	aperture border:	Thin lip
umb chbr shape:	Subtriangular	umbilicus:	Narrow	periph margin shape:	Broadly rounded	accessory apertures:	None
spiral sutures:	Flush	umb depth:	Shallow	wall texture:	Smooth	shell porosity:	Macroperforate: >2.5µm
umbilical or test sutures:	Weakly depressed	final-whorl chambers:	3-3.5	N.B. These characters are used for advanced search. N/A - not applicable

Globoconella inflata

Taxonomy

Description

Biogeography and Palaeobiology

Biostratigraphic distribution

References:

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