| Daughter taxa: (blue => in age window 0-800Ma) | ||||
| | | monospecific | |
| Specimens which cannot be assigned to established species | ||||
Catalog entries: Sphaeroidinella;
Type images:Distinguishing features: 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.
Test morphology: The genus Sphaeroidinella is distinguished from Sphaeroidinellopsis by the presence of supplementary apertures on the spiral side. [Kennett & Srinivasan 1983]
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.
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:
Primary source for this page: Kennett & Srinivasan 1983, p.212
Cushman, J.A., (1927). An outline of a re-classification of the Foraminifera. Contributions from the Cushman Laboratory for Foraminiferal Research, 3: 1-105. GS Kennett, J.P. & Srinivasan, M.S., (1983). Neogene Planktonic Foraminifera. Hutchinson Ross Publishing Co., Stroudsburg, Pennsylvania, 1-265 pp. GSReferences:
 |
Sphaeroidinella compiled by the pforams@mikrotax project team viewed: 23-2-2019
Short stable page link: http://mikrotax.org/pforams/index.php?id=104212 Go to Archive.is to create a permanent copy of this page - citation notes |