pforams@mikrotax - Guembelitrioides pforams@mikrotax - Guembelitrioides

Guembelitrioides


Classification: pf_cenozoic -> Globigerinidae -> Guembelitrioides
Sister taxa: Beella, Globigerina, Globigerinella, Protentella, Quiltyella ⟩⟨ Ciperoella, Globigerinoides, Globigerinoidesella, Globoturborotalita, Orbulina, Praeorbulina, Sphaeroidinella, Sphaeroidinellopsis, Trilobatus, Turborotalita ⟩⟨ Dentoglobigerina, Globoquadrina ⟩⟨ Catapsydrax, Clavatorella, Paragloborotalia, Protentelloides ⟩⟨ Eoglobigerina, Globigerinatheka, Globorotaloides, Guembelitrioides, Orbulinoides, Parasubbotina, Pseudoglobigerinella, Subbotina
Daughter taxa (time control age-window is: 0-800Ma)
Guembelitrioides nuttalli
The very high spire, lobate periphery, globular chambers and supplementary apertures typically characterize this species.
Guembelitrioides sp.
Specimens which cannot be assigned to established species

Taxonomy

Citation: Guembelitrioides El Naggar, 1971
taxonomic rank: Genus
Type species: “Globigerinoides” higginsi Bolli, 1957; junior synonym of “Globigerinoides” nuttalli Hamilton, 1953
Taxonomic discussion: El-Naggar (1971, p. 450) in his classification of Globigerinacea stated that, in his view, “highly turreted Globigerinoides species, such as Globigerinoides higginsi Bolli, 1957, are in fact Guembelitrias with developed supplementary apertures. They are related to Guembelitria in the same way as Globigerinoides is related to Globigerina”. However, Guembelitrioides bears no relation to Guembelitria, which is a microperforate nonspinose genus. On the other hand, Bolli (1957b) in describing his species clearly stated that his Globigerinoides higginsi (= nuttalli) had no relationship with Neogene Globigerinoides even though they both shared supplementary apertures. Nevertheless it is useful to recognize the nuttalli (= higginsi) morphology as distinct at the generic level, so El Naggar’s name stands. The genus is monospecific. [Olsson et al. 2006]

Loeblich and Tappan (1961, 1988) included the genus Guembelitriodes in the Family Catapsydracidae. Here we include it in the Family Globigerinidae. [Olsson et al. 2006]

Catalog entries: Guembelitrioides

Distinguishing features:
Parent taxon (Globigerinidae): Wall spinose, usually with 3½-6 globular chambers in final whorl, trochospiral or planispiral
This taxon: Like Subbotina gortanii group but with supplementary sutural apertures.

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


Morphology:
Test trochospiral, globigerini-form, high spired becoming helicospiral with ontogeny; chambers subspherical, loosely attached in final whorl(s); sutures radial, moderately to strongly depressed; periphery distinctly lobate; primary aperture arched, umbilical, at least one supplementary aperture is usually present on the spiral side of the final whorl.
[Olsson et al. 2006]

Wall type:
Spinose, high porosity cancellate sacculifer type wall texture, pore diameter 5 µm. [Olsson et al. 2006]

Biogeography and Palaeobiology

Most likely ancestor: Parasubbotina - at confidence level 0 (out of 5). Data source: .
Likely descendants: Globigerinatheka; plot with descendants

Biostratigraphic distribution

Geological Range:
Last occurrence (top): at top of E10 zone (100% up, 41.9Ma, in Lutetian stage). Data source: Total of ranges of the species in this database
First occurrence (base): within E8 zone (43.85-45.72Ma, base in Lutetian stage). Data source: Total of ranges of species in this database

Plot of occurrence data:

Primary source for this page: Olsson et al. 2006 - Eocene Atlas, chap. 5, p. 84

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. (1957a). Planktonic foraminifera from the Eocene Navet and San Fernando formations 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: 155-172. gs

El-Naggar, Z. R. (1971a). On the classification, evolution and stratigraphical distribution of the Globigerinacea. In, Farinacci, A. (ed.) Proceedings of the Second Planktonic Conference, Roma 1970. Edizioni Tecnoscienza, Rome (1): 421-476. gs

Hamilton, E. L. (1953). Upper Cretaceous, Tertiary, and Recent planktonic foraminifera from mid-Pacific flat-topped seamounts. Journal of Paleontology. 27(2): 204-237. gs

Loeblich, A. R. & Tappan, H. (1961). Cretaceous planktonic foraminifera: Part I-Cenomanian. Micropaleontology. 7: 257-304. gs

Loeblich, A. R. & Tappan, H. (1988). Foraminiferal Genera and Their Classification (Volume I-II). Van Nostrand Reinhold Co., New York. 1-1059. gs

Olsson, R. K., Pearson, P. N. & Huber, B. T. (2006c). Taxonomy, biostratigraphy, and phylogeny of Eocene Catapsydrax, Globorotaloides, Guembelitrioides, Paragloborotalia, Parasubbotina, and Pseudoglobigerinella n. gen. In, Pearson, P. N., Olsson, R. K., Hemleben, C., Huber, B. T. & Berggren, W. A. (eds) Atlas of Eocene Planktonic Foraminifera. Cushman Foundation for Foraminiferal Research, Special Publication . 41(Chap 5): 67-110. gs O

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Guembelitrioides compiled by the pforams@mikrotax project team viewed: 14-12-2024

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