|Daughter taxa (time control age-window is: 0-800Ma)|
Specimens which cannot be assigned to established species
Original description: Test free, early stage possibly slightly trochospiral, later planispiral, stellate, biumbilicate; early chambers globular to subglobular, chambers of last whorl elongate; some or all chambers of the last whorl with two or occasionally more long, tapering spines or bulb-shaped extensions symmetrically arranged on each side of the equatorial plane. Sutures depressed, radial; wall calcareous, perforate; surface smooth, pitted or hispid; aperture an interiomarginal, equatorial arch in the early stage, ultimate chamber with two interiomarginal, umbilical apertures, one on each side of the chamber. There are indications that in some specimens relict apertures may exist in the penultimate and possibly in earlier chambers of the last whorl.
Entries in the Catalog of original descriptions: Leupoldina
Parent taxon (Schackoinidae): Test trochospiral to nearly planispiral, chambers with one or more hollow tubulospines; aperture equatorial and may have broad lip.
This taxon: Test irregular in form, in a low trochospiral coil, early chambers small and subglobular, then rapidly enlarging, becoming radially elongate and tapering distally, chambers of the final whorl clavate, the final one or two chambers commonly with two bulbous projections, one on each side of the median plane, sutures distinct, depressed; wall calcareous, perforate, surface smooth, pitted or hispid; aperture interiomarginal and equatorial, with a narrow bordering lip, final chamber may have an aperture at each side of the median plane.
Last occurrence (top): at top of G. algerianus zone (100% up, 118.9Ma, in Aptian stage). Data source: Total of ranges of the species in this database
First occurrence (base): within L. cabri zone (123.89-125.71Ma, base in Aptian stage). Data source: Total of ranges of species in this database
Plot of range and occurrence data:
Leupoldina compiled by the pforams@mikrotax project team viewed: 29-11-2023
Short stables page link: https://mikrotax.org/pforams/index.php?id=110308 Go to Archive.is to create a permanent copy of this page - citation notes
This policy contains information about your privacy. By posting, you are declaring that you understand this policy:
This policy is subject to change at any time and without notice.
These terms and conditions contain rules about posting comments. By submitting a comment, you are declaring that you agree with these rules:
Failure to comply with these rules may result in being banned from submitting further comments.
These terms and conditions are subject to change at any time and without notice.