Globorotalia evoluta

Classification: pf_cenozoic -> Globorotaliidae -> Globorotalia -> hirsuta lineage -> Globorotalia margaritae -> Globorotalia evoluta
Sister taxa: G. evoluta, G. primitiva,


Citation: Globorotalia evoluta Cita 1973
Rank: species
Basionym: Globorotalia margaritae evoluta Cita 1973
Synonyms: Hirsutella evoluta (Cita 1973) - e.g. used by Aze et al. 2011

Catalog entries: Globorotalia margaritae evoluta

Type images:

Distinguishing features: larger and with a more symmetrical profile

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: As H. margaritae but larger with a more symmetrical profile

Aperture: Interiomarginal umbilical-extraumbilical low slit bordered by a pronounced lip [Aze et al.  2011, based on Stewart (2003)]

Wall type: Non-spinose; Smooth [Aze et al. 2011]

Character matrix

test outline:Lobatechamber arrangement:Trochospiraledge view:Equally biconvexaperture:Umbilical-extraumbilical
sp chamber shape:Crescenticcoiling axis:Lowperiphery:Single keelaperture border:Thick lip
umb chbr shape:Subtriangularumbilicus:Narrowperiph margin shape:Subangularaccessory apertures:None
spiral sutures:Raisedumb depth:Shallowwall texture:Smoothshell porosity:Macroperforate: >2.5┬Ám
umbilical or test sutures:Weakly depressedfinal-whorl chambers:5.0-5.0 N.B. These characters are used for advanced search. N/A - not applicable

Biogeography and Palaeobiology

Geographic distribution: Low to middle latitudes [Aze et al. 2011, based on This study]

[SCOR WG138]

Isotope paleobiology: Aze et al. 2011 ecogroup 4 - Open ocean sub-thermocline. Based on comparison with other species of the genus

Most likely ancestor: Globorotalia margaritae - at confidence level 3 (out of 5). Data source: Stewart 2003 fig. 6.10; Aze et al. 2011, appendix 5.

Biostratigraphic distribution

Geological Range:
Last occurrence (top): within PL2 zone (3.85-4.37Ma, top in Zanclean stage). Data source: Aze et al. 2011
First occurrence (base): within PL1 [Atl.] zone (4.37-5.72Ma, base in Messinian stage). Data source: Aze et al. 2011

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 :: ::

Cita, M. B. (1973). Pliocene biostratigraphy and chronostratigraphy. Initial Reports of the Deep Sea Drilling Project. 13: 1343-1379. gs :: ::

Stewart, D. R. M. I. (2003). Evolution of Neogene globorotaliid foraminifera and Micoene climate change. In, p269 (ed.) . Earth Sciences. 1-269. gs :: ::


Globorotalia evoluta compiled by the pforams@mikrotax project team viewed: 4-6-2020

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