pforams@mikrotax - Globanomalina pseudomenardii

pforams@mikrotax - Globanomalina pseudomenardii pforams@mikrotax - Globanomalina pseudomenardii

Globanomalina pseudomenardii

Classification: pf_cenozoic -> Globanomalinidae -> Globanomalina -> Globanomalina pseudomenardii
Sister taxa: G. australiformis, G. luxorensis, G. ovalis, G. imitata, G. planocompressa ⟩⟨ G. planoconica, G. chapmani, G. pseudomenardii, G. ehrenbergi, G. compressa, G. archeocompressa, G. sp.

Olsson_etal_99_pl38_f05-7.jpg
Olsson_etal_99_pl38_f13-16.jpg
Olsson_etal_99_pl38_f01-4.jpg
Olsson_etal_99_pl38_f08_f10-12.jpg
Olsson_etal_99_pl38_f09.jpg
Postuma 1971 p205-4.JPG
Postuma 1971 p205-7.JPG

Taxonomy

Citation: Globanomalina pseudomenardii (Bolli 1957)

Taxonomic rank: species

Basionym: Globorotalia pseudomenardii

Synonyms:

Globorotalia membranacea (Ehrenberg). —Subbotina, 1953:205, pl. 16: fig. 13a-c [Paleocene, Tarkhankut Peninsula, Crimea] [in part, not pl. 16: figs. 7a-12c]. [Not Planulina membranacea Ehrenberg, 1854.]
Globorotalia pseudomenardii Bolli, 1957a:77, holotype: pl. 20: figs. 14-16; paratype: pl. 20:fig.17 [Globorotalia pseudomenardii Zone, Lizard Springs Fm., Trinidad].—Loeblich and Tappan, 1957a: 193, pl. 47:fig.4a-c [Zone P4, Salt Mountain Limestone, Alabama], pl. 49:fig.6a-c [lower Zone P4, Homerstown Fm., New Jersey], pl. 54: figs. 10a-13c [Zone P4, Vincentown Fm., New Jersey], pl. 59:fig.3a-c [Zone P4, Aquia Fm., Maryland], pl. 60: fig. 8a-c [Zone P4, Nanafalia Fm., Alabama], pl. 63: fig. la-c [Zone P4, Velasco Fm., Mexico] [in part, not pl. 45: fig. 10a-c].—Bolli and Cita, 1960:26, pl. 33: fig. 2a-c [Globorotalia pseudomenardii Zone, Paderno d'Adda section, northern Italy].
Globorotalia (Globorotalia) pseudomenardii Bolli.—Hillebrandt, 1962:126, pl. 12: figs. 5a-6b [upper Paleocene beds of Reichhall-Salzburg Basin, Austria].—Blow, 1979:892, pl. 89: figs. 1-5 [Zone P4, DSDP Hole 21A/3/5: 74-76 cm; Rio Grande Rise, South Atlantic Ocean], pl. 94: figs. 1-5 [Zone P4, Lindi area, Tanzania], pl. 108: figs. 4-7 [Zone P4, DSDP Hole 20C/6/3 76-78 cm; Brazil Basin, South Atlantic Ocean], pl. Ill: figs. 1-4, pl. 112 figs. 2, 3, 9, 10 [Zone P4, Moogli Mudstones, Papua] [in part, not pl. 105 figs. 3, 7-10],
Planorotalites pseudomenardii Bolli.—Nederbragt and Van Hinte, 1987:587, pl. 1: figs. 1-16 [Zone P4, DSDP Site 605/46/4,46/6,46/3, 52/2; New Jersey margin, western North Atlantic Ocean]. — Nocchi et al., 1991:269, pl. 1: figs. 7-9 [Zone P4, ODP Hole 698A/11R/CC; northeast Georgia Rise, South Atlantic Ocean]. [Olsson et al. 1999]

Variants:

Taxonomic discussion: There is considerable variation in the shape of the equatorial periphery, which varies from fairly smooth to strongly lobulate, depending on the rate of size increase or decrease of the final few chambers in the ultimate whorl. [Olsson et al. 1999]

Catalog entries: Globorotalia pseudomenardii

Type images:

holotype: G. pseudomenardii
holotype: G. pseudomenardii
paratype: G. pseudomenardii

Distinguishing features:
Parent taxon (Globanomalina): Very low trochospiral; 5-6 chambers in final whorl; chamber-shape variable.
Aperture interiomarginal, umbilical-extraumbilical, arch with narrow lip.
Wall smooth, normally perforate, pustules in some species.
This taxon: Test spiroconvex with distinct keel & sharply-angled axial periphery. Umbilicus narrow. 5 (rarely 6) chambers in final whorl.

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.

Description

Diagnostic characters:

The distinct keel, the sharply-angled axial periphery, spiroconvex test, and narrow umbilicus are distinguishing features. The number of chambers in the ultimate whorl is consistently 5, but rarely a 6 chambered form is observed. [Olsson et al. 1999]

Character matrix
test outline: Lobate chamber arrangement: Trochospiral edge view: Inequally biconvex aperture: Umbilical-extraumbilical
sp chamber shape: Petaloid coiling axis: Very low periphery: Single keel aperture border: Thin lip
umb chbr shape: Subtriangular umbilicus: Narrow periph margin shape: Subangular accessory apertures: None
spiral sutures: Weakly depressed umb depth: Shallow wall texture: Smooth shell porosity: Finely Perforate: 1-2.5µm
umbilical or test sutures: Moderately depressed final-whorl chambers: 5-6 N.B. These characters are used for advanced search. N/A - not applicable

Biogeography and Palaeobiology

Geographic distribution

Widely reported in the low to middle latitudes (Figure 18). [Olsson et al. 1999]
Aze et al. 2011 summary: Low to middle latitudes; based on Olsson et al. (1999)

Isotope paleobiology

Globanomalina pseudomenardii has δ18O and δ13C similar to Parasubbotina varianta and S. velascoensis. The species has distinctly more positive δ18O and more negative δ13C than Morozovella, Acarinina, and Igorina. [Olsson et al. 1999]
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): Olsson et al. (1999)

Phylogenetic relations

There is general agreement among workers that G. pseudomenardii originated from G. ehrenbergi (= G. haunsbergensis Gohrbandt) by an increase in the test size and the development of a peripheral keel. The species becomes extinct at the top of Zone P4. [Olsson et al. 1999]

Most likely ancestor:
Globanomalina ehrenbergi - at confidence level 4 (out of 5). Data source: Olsson et al. 1999, fig 5a.

Biostratigraphic distribution

Geological Range:
Notes: Zone P4. [Olsson et al. 1999]
The FAD of Globanomalina pseudomenardii marks the base of zone P4a / top of P3b (Wade et al. 2011)
Last occurrence (top): at top of P4 zone (100% up, 57.1Ma, in Thanetian stage). Data source: zonal marker (Wade et al. 2011)
First occurrence (base): at base of P4 zone (0% up, 60.7Ma, in Selandian stage). Data source: zonal marker (Wade et al. 2011)

Plot of occurrence data:

Range-bar - range as quoted above, pink interval top occurs in, green interval base occurs in.
Triangles indicate an event for which a precise placement has been suggested
Histogram - Neptune occurrence data from DSDP and ODP proceedings. Pale shading <50 samples in time bin. Interpret with caution & read these notes
Taxon plotted: Globanomalina pseudomenardii, synonyms included - Globanomalina pseudomenardii; Globorotalia pseudomenardii; Planorotalia pseudomenardii; Planorotalites pseudomenardii;
See also space-time plot :: Samples map :: Parent: Globanomalina

Primary source for this page: Olsson et al. 1999 - Atlas of Paleocene Planktonic Foraminifera, p. 45

References:

Blow, W. H. (1979). The Cainozoic Globigerinida: A study of the morphology, taxonomy, evolutionary relationships and stratigraphical distribution of some Globigerinida (mainly Globigerinacea). E. J. Brill, Leiden. 2: 1-1413. gs

Bolli, H. M. (1957d). The genera Globigerina and Globorotalia in the Paleocene-Lower Eocene Lizard Springs Formation of Trinidad. In, Loeblich, A. R. , Jr., Tappan, H., Beckmann, J. P., Bolli, H. M., Montanaro Gallitelli, E. & Troelsen, J. C. (eds) Studies in Foraminifera. U.S. National Museum Bulletin . 215: 61-82. gs

Ehrenberg, C. G. (1854). Mikrogeologie: Das Erden und Felsen schaffende Wirken des unsichtbar kleinen selbständigen Lebens auf der Erde. Leopold Voss, Leipzig. 1-374. gs

Hillebrandt, A. , von (1962). Das Paleozän und seine Foraminiferenfauna im Becken von Reichenhall und Salzburg. Abhandlungen Bayerischen Akademie der Wissenschaften. 108: 1-182. gs

Nederbragt, A. J. & van Hinte, J. E. (1987). Biometric Analysis of Planorotalites pseudomenardii (Upper Paleo- cene) at Deep Sea Drilling Site 605, Northwestern Atlantic. Initial Reports of the Deep Sea Drilling Project. 93: 577-592. gs

Nocchi, M., Amici, E. & Premoli Silva, I. (1991). Planktonic foraminiferal biostratigraphy and paleoenvironmental interpretation of Paleogene faunas from the subantarctic transect, Leg 114. Proceedings of the Ocean Drilling Program, Scientific Results. 114: 233-273. gs

Olsson, R. K., Hemleben, C., Berggren, W. A. & Huber, B. T. (1999). Atlas of Paleocene Planktonic Foraminifera. Smithsonian Institution Press, Washington, DC. (85): 1-252. gs

Postuma, J. A. (1971). Manual of planktonic foraminifera. Elsevier for Shell Group, The Hague. 1-406. gs

Subbotina, N. N. (1953). Foraminiferes fossiles d'URSS Globigerinidae, Globorotaliidae, Hantkeninidae. Bureau de Recherches Geologiques et Minieres. 2239: 1-144. gs

Wade, B. S., Pearson, P. N., Berggren, W. A. & Pälike, H. (2011). Review and revision of Cenozoic tropical planktonic foraminiferal biostratigraphy and calibration to the geomagnetic polarity and astronomical time scale. Earth-Science Reviews. 104: 111-142. gs

Globanomalina pseudomenardii compiled by the pforams@mikrotax project team viewed: 13-2-2026

Taxon Search:

Advanced Search

Short stable page link: https://mikrotax.org/pforams/index.php?id=100105 Go to Archive.is to create a permanent copy of this page - citation notes

Add Comment

Comments

No comments yet. Be the first!

test outline:	Lobate	chamber arrangement:	Trochospiral	edge view:	Inequally biconvex	aperture:	Umbilical-extraumbilical
sp chamber shape:	Petaloid	coiling axis:	Very low	periphery:	Single keel	aperture border:	Thin lip
umb chbr shape:	Subtriangular	umbilicus:	Narrow	periph margin shape:	Subangular	accessory apertures:	None
spiral sutures:	Weakly depressed	umb depth:	Shallow	wall texture:	Smooth	shell porosity:	Finely Perforate: 1-2.5µm
umbilical or test sutures:	Moderately depressed	final-whorl chambers:	5-6	N.B. These characters are used for advanced search. N/A - not applicable