pforams@mikrotax - Sphaeroidinella

Sphaeroidinella

Classification: pf_cenozoic -> Globigerinidae -> Sphaeroidinella
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)
			Sphaeroidinella dehiscens monospecific
			Sphaeroidinella sp. Specimens which cannot be assigned to established species

Taxonomy

Citation: Sphaeroidinella Cushman 1927

Rank: genus

Type species: Sphaeroidina bulloides var. dehiscens

Taxonomic discussion: This monotypic genus is justified by preserving common usage and paying tribute to the significance of the development of supplementary apertures as a genus-level character among all other Neogene lineages of planktonic foraminifera. [Brummer & Kucera 2022]

Catalog entries: Sphaeroidinella

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

Emended description:

Morphology:

The genus Sphaeroidinella is distinguished from Sphaeroidinellopsis by the presence of supplementary apertures on the spiral side. [Kennett & Srinivasan 1983]

Wall type:

Size:

Biogeography and Palaeobiology

Geographic distribution:

Phylogenetic relations: Sphaeroidinella evolved from Sphaeroidinellopsis in the earliest Pliocene by developing supplementary apertures and larger test size (Text Fig. 23). The initial evolutionary appearance of Sphaeroidinella marks the base of Zone N19 (Early Pliocene). [Kennett & Srinivasan 1983]

Most likely ancestor: Sphaeroidinellopsis - at confidence level 5 (out of 5). Data source: Kennett & Srinivasan 1983.

Biostratigraphic distribution

Geological Range:
Last occurrence (top): Extant. Data source: Total of range of species in this database
First occurrence (base): near top of Messinian Stage (88% up, 5.6Ma, in Messinian stage). Data source: Total of range of species in this database

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
Neptune data: This is a higher taxon page so Neptune data is not plotted. See also: customisable plot Parent: Globigerinidae

Primary source for this page: Kennett & Srinivasan 1983, p.212

References:

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

Cushman, J. A. (1927a). An outline of a re-classification of the Foraminifera. Contributions from the Cushman Laboratory for Foraminiferal Research. 3: 1-105. gs V O

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

Sphaeroidinella compiled by the pforams@mikrotax project team viewed: 2-10-2022

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Short stable page link: https://mikrotax.org/pforams/index.php?id=104212 Go to Archive.is to create a permanent copy of this page - citation notes

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