Specimens which cannot be assigned to established species
| Daughter taxa (time control age-window is: 0-800Ma) | ||||
| | Leupoldina cabri | ||
| | | Leupoldina hexacamerata | |
| | Leupoldina pustulans | ||
| | Leupoldina quinquecamerata | ||
| | Leupoldina reicheli | ||
| Leupoldina sp. Specimens which cannot be assigned to established species | ||||
Taxonomy
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
Distinguishing features:
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.
Geological Range:
Last occurrence (top): in upper part of Aptian Stage (55% up, 119Ma, in Aptian stage). Data source: Total of range of species in this database
First occurrence (base): at base of Aptian Stage (4% up, 125.8Ma, in Aptian stage). Data source: Total of range of species in this database
Plot of range and occurrence data:
References:
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Leupoldina compiled by the pforams@mikrotax project team viewed: 20-3-2023
Short stable page link: https://mikrotax.org/pforams/index.php?id=110308 Go to Archive.is to create a permanent copy of this page - citation notes |
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