"Globorotalia mediterranea Catalano and Sprovieri appears to be a closely related species." [Kennett & Srinivasan 1983]
Catalog entries: Globorotalia conomiozea, Globorotalia miocenica mediterranea
Type images:Distinguishing features:
Parent taxon (Globoconella): Globorotaliids having a high-arched aperture
This taxon: Like G. miotumida but more strongly vaulted umbilical side, and with 4-4¼ chambers in final whorl (vs. 4½-5).
Morphology:
Wall type:
Character matrix
test outline: | Subcircular | chamber arrangement: | Trochospiral | edge view: | Planoconvex | aperture: | Umbilical-extraumbilical |
sp chamber shape: | Crescentic | coiling axis: | Low | periphery: | Single keel | aperture border: | Thin lip |
umb chbr shape: | Subtriangular | umbilicus: | Narrow | periph margin shape: | Subangular | 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: | 4-4.5 | N.B. These characters are used for advanced search. N/A - not applicable |
[SCOR WG138]
Geographic distribution
Isotope paleobiology
Phylogenetic relations
Gr. (G.) conomiozea is a short-ranging species of an evolving lineage and hence is a valuable index fossil. A detailed biometric study of its evolution has been carried out by Malmgren and Kennett (1981). [Kennett & Srinivasan 1983]
Chaproniere (1973) first proposed the evolutionary origin of the species from miotumida.
Most likely ancestor: Globoconella miotumida - at confidence level 3 (out of 5). Data source: Chaproniere 1973; Kennett & Srinivasan 1983, fig. 13, Wei 1994, fig.1.
Likely descendants: Globoconella terminalis;
plot with descendants
Geological Range:
Last occurrence (top): within M14 [Atl.] zone (5.72-6.14Ma, top in Messinian stage). Data source: Wei 1994 (quoted age converted to modern zone)
First occurrence (base): within M13b subzone (6.14-8.58Ma, base in Tortonian stage). Data source: Wei 1994 (quoted age converted to modern zone)
Plot of occurrence data:
Primary source for this page: Kennett & Srinivasan 1983, p.114
Aze, T. et al. (2011). A phylogeny of Cenozoic macroperforate planktonic foraminifera from fossil data. Biological Reviews. 86: 900-927. gs Chaproniere, G. C. H. (1973). On the Origin of Globorotalia miotumida conomiozea Kennett, 1966. Micropaleontology. 19(4): 461-468. gs Crundwell, M. P. (2018). Globoconella pseudospinosa, n. sp.: A new Early Pliocene planktonic foraminifera from the Southwest Pacific. Journal of Foraminiferal Research. 48(4): 288-300. gs Kennett, J. P. & Srinivasan, M. S. (1983). Neogene Planktonic Foraminifera. Hutchinson Ross Publishing Co., Stroudsburg, Pennsylvania. 1-265. gs Kennett, J. P. (1966). The Globorotalia crassaformis bioseries in north Westland and Marlborough, New Zealand,. Micropaleontology. 12: 235-245. 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 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 Schneider, C. E. & Kennett, J. P. (1996). Isotopic evidence for interspecies habitat differences during evolution of the Neogene planktonic foraminiferal clade Globoconella. Paleobiology. 22: 282-303. 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. gsReferences:
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Globoconella conomiozea compiled by the pforams@mikrotax project team viewed: 9-2-2025
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