pforams@mikrotax - Globorotalia eastropacia pforams@mikrotax - Globorotalia eastropacia

Globorotalia eastropacia

Classification: pf_cenozoic -> Globorotaliidae -> Globorotalia -> hirsuta lineage -> Globorotalia eastropacia
Sister taxa: G. hirsuta, G. eastropacia, G. margaritae, G. juanai ⟩⟨ G. bermudezi, G. scitula, G. praescitula ⟩⟨ G. cibaoensis, G. gigantea, G. challengeri


Citation: Globorotalia eastropacia Boltovskoy, 1974
Rank: Species
Basionym: Globorotalia hirsuta eastropacia Boltovskoy, 1974
Taxonomic discussion: G. theyeri and G. eastropacia are widely accepted to be synonyms (e.g by Kennett & Srinivasan 1983), and the taxon has usually been named G. theyeri. However, Brummer & Kucera (2022) showed that G. eastropacia has priority (publishedin Jan 1974 vs April 1974) and so is the correct name. 

Catalog entries: Globorotalia (Hirsutella) theyeri, Globorotalia hirsuta eastropacia

Type images:

Distinguishing features:
Parent taxon (hirsuta lineage): G. scitula - juanai - margaritae - hirsuta lineage
This taxon: Distinct but thin peripheral keel and strongly recurved spiral sutures, lobate outline

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.


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


Character matrix
test outline:Stellatechamber arrangement:Trochospiraledge view:Inequally 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:Weakly depressedumb depth:Shallowwall texture:Smoothshell porosity:Macroperforate: >2.5µm
umbilical or test sutures:Weakly depressedfinal-whorl chambers:4.0-5.0 N.B. These characters are used for advanced search. N/A - not applicable

Biogeography and Palaeobiology

Similar species

This species differs from Gr. (H.) scitula in having a distinct but thin peripheral keel and more strongly recurved spiral sutures. [Kennett & Srinivasan 1983]

Geographic distribution
Low latitudes [Aze et al. 2011, based on Kennett & Srinivasan (1983)]

In modern oceans a common, temperate water, species [SCOR WG138]

Map of distribution from ForCenS database

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

Phylogenetic relations

Gr. (H.) theyeri evolved from Gr. (H.) margaritae from which it is distinguished by its distinctly flattened spiral side, its flaring chambers of the final whorl, and a relatively large umbilicus. [Kennett & Srinivasan 1983]

Biostratigraphic distribution

Geological Range:
Notes: Early Pliocene Zone N19 to Recent. Tropical. [Kennett & Srinivasan 1983]
Last occurrence (top): Extant. Data source: present in the plankton (SCOR WG138)
First occurrence (base): within N19 zone (4.37-5.20Ma, base in Zanclean stage). Data source: Kennett & Srinivasan 1983

Plot of occurrence data:

Primary source for this page: Kennett & Srinivasan 1983, p.140


Aze, T. et al. (2011). A phylogeny of Cenozoic macroperforate planktonic foraminifera from fossil data. Biological Reviews. 86: 900-927. gs

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

Fleisher, R. L. (1974a). Cenozoic planktonic foraminifera and biostratigraphy, Arabian Sea, Deep Sea Drilling Project, Leg 23A. Initial Reports of the Deep Sea Drilling Project. 23: 1001-1072. gs

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

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


Globorotalia eastropacia compiled by the pforams@mikrotax project team viewed: 5-6-2023

Taxon Search:
Advanced Search
AphiaID: 1567942 Nomenclatural data on WoRMS
Short stables page link: Go to to create a permanent copy of this page - citation notes

Comments (0)

No comments yet on this page. Please do add comments if you spot any problems, or have information to share

Add Comment

* Required information
Captcha Image
Powered by Commentics