The argument of Wei (1987) for separating the (sub)species mons and terminalis based on stratigraphic range seems to be undermined by the data of Wei (1994) which extends the range of terminalis into the basal Pliocene. So, possibly mons is a senior synonym of terminalis. However, we follow the conventional taxonomy here pending critical re-evaluation by the Neogene Planktonic foraminifera working group [editor's comment - JRY 2019]
Catalog entries: Globorotalia (Globoconella) conomiozea terminalis, Globorotalia conomiozea mons
Type images:Distinguishing features:
Parent taxon (Globoconella): Globorotaliids having a high-arched aperture
This taxon: Very high conical angle (64-70°), margin acute with distinctive to faint keel
Morphology:
Wall type:
Character matrix
test outline: | Subquadrate | 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
Most likely ancestor: Globoconella conomiozea - at confidence level 3 (out of 5). Data source: Wei 1994, fig. 1.
Likely descendants: Globoconella pliozea; Globoconella puncticulata; Globoconella sphericomiozea;
plot with descendants
Geological Range:
Last occurrence (top): within PL1 [Atl.] zone (4.37-5.72Ma, top in Zanclean stage). Data source: Wei 1994 (quoted age converted to modern zone)
First occurrence (base): within M14 [Atl.] zone (5.72-6.14Ma, base in Messinian stage). Data source: Wei 1994 (quoted age converted to modern zone)
Plot of occurrence data:
Aze, T. et al. (2011). A phylogeny of Cenozoic macroperforate planktonic foraminifera from fossil data. Biological Reviews. 86: 900-927. gs Hornibrook, N. d. B. (1981). Globorotalia in the late Pliocene and early Pleistocene of New Zealand. New Zealand Journal of Geology and Geophysics. 24: 263-292. gs Kennett, J. P. (1966). The Globorotalia crassaformis bioseries in north Westland and Marlborough, New Zealand,. Micropaleontology. 12: 235-245. 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. (1987). Multivariate morphometric differentiation of chronospecies in the late Neogene planktonic foraminiferal lineage Globoconella. Marine Micropaleontology. 12: 183-202. gsReferences:
Globoconella terminalis compiled by the pforams@mikrotax project team viewed: 10-12-2024
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