Globoconella

NB TAXA WHICH ORIGINATE IN THE OLIGOCENE ARE NOT INCLUDED YET
Classification: pf_neogene -> Globorotalidae -> Globoconella
Sister taxa: Berggrenia, Dentigloborotalia, Dentoglobigerina, Globoconella, Globoquadrina, Globorotalia, Globorotaloides, Neogloboquadrina, Pulleniatina,
Daughter taxa (blue => in age window 0-300Ma)


monospecific






Specimens which cannot be assigned to established species

Taxonomy

Citation: Globoconella Bandy 1975
Rank: genus
Type species: Globorotalia conomiozea Kennett 1966
Synonyms:
Taxonomic discussion: Bandy (1975) proposed the subgenus Globoconella for the globorotaliids having a high-arched aperture showing affinity to the Globorotalia miozea Finlay lineage. Srinivasan and Kennett (1981a, 1981b) emended the diagnosis of Globoconella Bandy and included in this lineage Gr. incognita, Gr. zealandica, Gr. praescitula, Gr. panda, Gr. miozea, Gr. conoidea, Gr. conomiozea, Gr. sphericomiozea, Gr. puncticulata, and Gr. inflata (Text Fig. 13). The evolution of Gr. (G.) incognita to Gr. (G.) miozea through Gr. (Globoconella) praescitula is considered by Srinivasan and Kennett (1981b) to represent one continuum rather than two parallel bioseries suggested earlier by Walters (1965).
The Globoconella series is a major lineage in temperate areas and the most useful for biostratigraphic subdivision of that region. The continuum of forms in this lineage includes both keeled and nonkeeled and inflated and compressed forms. Most of the elements are thickwalled and thus dissolution resistant. In some cases, thin-walled forms have been designated as different species from thick-walled forms. For instance, we consider Globorotalia (Globoconella) miotumida to be a thin-walled form of Gr. (G.) conoidea. [Kennett & Srinivasan 1983]
Wei (1987, 1994) document evolution in the lineage in detail. 

Catalog entries: Globorotalia (Globoconella);

Type images:

Short diagnosis: Globorotaliids having a high-arched aperture

NB The short diagnoses are used in the tables of daughter-taxa to act as quick summaries of the differences between e.g. species of one genus. They have initially been copied from the diagnostic characters/distinguishing features sections of the Eocene and Paleocene Atlases, they will be edited as the site is developed.

Description

Biogeography and Palaeobiology


Geographic distribution: The Globoconella series is a major lineage in temperate areas and the most useful for biostratigraphic subdivision of that region.

Phylogenetic relations: Globorotalia (Globoconella) incognita, the earliest member of the lineage, evolved in the Early Miocene from an Oligocene globorotaliid stock. Judging from the stratigraphic ranges and morphological and surface ultrastructural characteristics, "Gr." nana seems to be the ancestral form of Globoconella. Jenkins (1971) and Srinivasan and Kennett (1981b) earlier suggested that its ancestry was from Neogloboquadrina continuosa. However, although N. continuosa is morphologically similar to Gr. (Globoconella) incognita, it gives rise to a different lineage. We no longer assign N. continuosa to Early Miocene forms for phylogenetic reasons. [Kennett & Srinivasan 1983]

Biostratigraphic distribution

Geological Range:
Last occurrence (top): Extant Data source: Total of range of species in this database
First occurrence (base): within Burdigalian Stage (15.97-20.44Ma, base in Burdigalian stage). Data source: Total of range of species in this database

Plot of occurrence data:

Primary source for this page: Kennett & Srinivasan 1983 p. 103

References:

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

Kennett, J.P., (1966). The Globorotalia crassaformis bioseries in north Westland and Marlborough, New Zealand,. Micropaleontology, 12: 235-245.

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.

Srinivasan, M.S. & Kennett, J.P., (1981). A review of Neogene planktonic foraminiferal biostratigraphy: applications in the equatorial and south Pacific. SEPM Special Publication: 395-432.

Srinivasan, M.S. & Kennett, J.P., (1981). Neogene planktonic foraminiferal biostratigraphy and evolution: equatorial to subantarctic, south Pacific. Marine Micropaleontology, 6: 499-533.

Walters, R., (1965). The Globorotalia zealandica and G. miosea lineages. New Zealand Journal of Geology and Geophysics, 8: 109-127.

Wei, K.-Y., (1987). Multivariate morphometric differentiation of chronospecies in the late Neogene planktonic foraminiferal lineage Globoconella. Marine Micropaleontology, 12: 183-202.

Wei, K.-Y., (1994). Allometric heterochrony in the Pliocene-Pleistocene planktic foraminiferal clade Globoconella. Paleobiology, 20: 66-84.

Wei, K.-Y., (1994). 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.


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Globoconella compiled by the pforams@mikrotax project team viewed: 24-2-2018

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