pforams@mikrotax - Planomalinidae pforams@mikrotax - Planomalinidae

Planomalinidae


Classification: pf_mesozoic -> Planomalinidae
Sister taxa: Guembelitriidae ⟩⟨ Heterohelicidae ⟩⟨ Planomalinidae, Globigerinelloididae, Schackoinidae ⟩⟨ Conoglobigerinidae, Chilostomellidae, Favusellidae, Praehedbergellidae, Hedbergellidae, Rugoglobigerinidae, Rotaliporidae, Globotruncanidae, hidden
Daughter taxa (time control age-window is: 0-800Ma)Granddaughter taxa
Planomalina
Test planispiral, partly evolute, biumbilicate, about eight to ten chambers in the final whorl, sutures broadly curved, thickened, elevated and nodose, peripheral outline lobulate, peripheral angle carinate; wall calcareous, finely perforate, radial in structure, ornamented by the thickened and nodose sutures and peripheral keel; aperture a basal equatorial arch with bordering lip, the opening extending to either side, where part of previous apertures and the bordering lip may remain exposed as relict apertures as the new chambers are added.
Planomalina buxtorfi
Planomalina praebuxtorfi
Planomalina pulchella
Planomalina sp.

Pseudoplanomalina

Pseudoplanomalina cheniourensis
Pseudoplanomalina sp.

Taxonomy

Citation: Planomalinidae Bolli, Loeblich & Tappan 1957
taxonomic rank: Family

Original description: Coiling planispiral; chambers spherical, ovate, clavate or angular rhomboid; primary aperture equatorial or symmetrically paired, with umbilical portions of successive apertures remaining as relict secondary apertures.

Entries in the Catalog of original descriptions: Planomalininae

Distinguishing features:
Parent taxon (pf_mesozoic):
This taxon: Test planispiral, biumbilicate, periphery carinate, sutures strongly arched; aperture a low equatorial opening.

Geological Range:
Last occurrence (top): at top of P. appenninica zone (100% up, 100.5Ma, in Albian stage). Data source: Total of ranges of the species in this database
First occurrence (base): within L. cabri zone (119.05-120.55Ma, base in Aptian stage). Data source: Total of ranges of species in this database

Plot of range and occurrence data:

References:

Bolli, H. M., Loeblich, A. R. & Tappan, H. (1957). Planktonic foraminiferal families Hantkeninidae, Orbulinidae, Globorotaliidae and Globotruncanidae. 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: 3-50. gs

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


logo

Planomalinidae compiled by the pforams@mikrotax project team viewed: 5-12-2024

Taxon Search:
Advanced Search

Short stable page link: https://mikrotax.org/pforams/index.php?id=110417 Go to Archive.is to create a permanent copy of this page - citation notes



Add Comment

* Required information
Captcha Image

Comments

No comments yet. Be the first!