Globorotalia archeomenardii

Classification: pf_neogene -> Globorotalidae -> Globorotalia -> menardii lineage -> Globorotalia archeomenardii
Sister taxa: G. pertenuis, G. exilis, G. limbata, G. multicamerata, G. miocenica, G. pseudomiocenica, G. menardii, G. praemenardii, G. archeomenardii,


Citation: Globorotalia archeomenardii Bolli, 1957
Rank: species
Basionym: Globorotalia archeomenardii Bolli, 1957

Catalog entries: Globorotalia archeomenardii;

Type images:

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.


Diagnostic characters: Lenticular, low trochospiral, prominent keel and densely perforate surface

Aperture: Interiomarginal umbilical-extraumbilical low-arched slit with distinct lip [Aze 2011, based on Kennett & Srinivasan 1983]

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

Test morphology: Test low trochospiral, compressed, equatorial periphery slightly lobate, axial periphery acute, with thin, keel-like structure, 5 to 5½ chambers in the final whorl, increasing uniformly in size, sutures on spiral side strongly curved; on umbilical side radial to slightly curved, depressed; surface smooth, very finely perforate; umbilicus small, shallow; aperture low-arched slit, with a distinct lip; interiomarginal, umbilical-extraumbilical. [Kennett & Srinivasan 1983]

Biogeography and Palaeobiology

Geographic distribution: Tropical to warm sub-tropical. [Kennett & Srinivasan 1983]

Isotope paleobiology: Aze et al. 2011 ecogroup 3 - Open ocean thermocline. Based on light ∂13C and relatively heavy ∂18O. Sources cited by Aze et al. 2011 (appendix S3): Pearson & Shackleton (1995); D. R. M. Stewart unpublished data

Phylogenetic relations: Gr. (M.) archeomenardii is distinguished from Gr. (M.) praemenardii in being smaller, less lobulate, and in having a more convex spiral side.
Gr. (M.) archeomenardii is the earliest member of the Menardella lineage, which evolved from Gr. (G.) praescitula in tropical waters during the latest Early Miocene. Bolli (1957) was the first to suggest that Gr. (M.) archeomenardii was ancestral to the Gr. (M.) praemenardii-Gr. (M.) menardii lineage. [Kennett & Srinivasan 1983]

Most likely ancestor: Globorotalia praescitula - at confidence level 4 (out of 5). Data source: Kennett & Srinivasan 1983, fig. 14.

Biostratigraphic distribution

Geological Range:
Last occurrence (top): in upper part of M7 zone (80% up, 13.9Ma, in Serravallian stage). Data source: Wade et al. (2011), additional event; position within zone determined by linear interpolation from data in table 1 of Wade et al. (2011).
First occurrence (base): at base of M5b subzone (0% up, 16.3Ma, in Burdigalian stage). Data source: Wade et al. (2011), zonal marker

Plot of occurrence data:

Primary source for this page: Kennett & Srinivisan 1983, p.122


Aze, T.; Ezard, T.H.G.; Purvis, A.; Coxall, H.K.; Stewart, D.R.M.; Wade, B.S. & Pearson, P.N.P., (2011). A phylogeny of Cenozoic macroperforate planktonic foraminifera from fossil data. Biological Reviews, 86: 900-927.

Bolli, H.M., (1957). Planktonic foraminifera from the Oligocene-Miocene Cipero and Lengua formations of Trinidad, B.W.I. In: Loeblich, A.R., Jr. et al. (Editors), Studies in Foraminifera: U.S. National Museum Bulletin 215U.S. Government Printing Office, Washington, DC, pp. 97-123.

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

Pearson, P.N. & Shackleton, N.J., (1995). Neogene multispecies planktonic foraminifer stable isotope record, Site 871, Limalok Guyot. Proceedings of the Ocean Drilling Program, Scientific Results, 144. Ocean Drilling Program, College Station, TX, 401-410 pp.


Globorotalia archeomenardii compiled by the pforams@mikrotax project team viewed: 19-2-2018

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