Taxonomy
Original description: Shape of test.- Early stage possibly very slightly trochospiral (usually not recognizable) later becoming planispiral, stellate. Wall. - Calcareus, finely perforate. Chambers.- Early chambers globular to subglobular, becoming more and more elongated; the five chambers of the last whorl each with a bulb-shaped extension (often broken off). Sutures.- Radial, depressed. Aperture.- An interiormarginal, equatorial arch, bordered by a lip; in position often slightly asymmetrical to the equatorial plane.
Entries in the Catalog of original descriptions: Schackoina pustulans quinquecamerata
Character matrix
test outline: | Stellate | chamber arrangement: | Pseudoplanispiral | edge view: | Compressed | aperture: | Equatorial |
sp chamber shape: | Elongate | coiling axis: | Very low | periphery: | N/A | aperture border: | Thin lip |
umb chbr shape: | Elongate | umbilicus: | Narrow | periph margin shape: | Moderately rounded | accessory apertures: | Relict |
spiral sutures: | Strongly depressed | umb depth: | N/A | wall texture: | Smooth | shell porosity: | |
umbilical or test sutures: | Strongly depressed | final-whorl chambers: | 5-5.5 | N.B. These characters are used for advanced search. N/A - not applicable |
Geological Range:
Last occurrence (top): within L. cabri zone (119.05-120.55Ma, top in Aptian stage). Data source: [copied from Chronos database]
First occurrence (base): within L. cabri zone (119.05-120.55Ma, base in Aptian stage). Data source: [copied from Chronos database]
Plot of range and occurrence data:
Bolli, H. M. (1957c). The foraminiferal genus Schackoina Thalmann, emended, and Leupoldina, n. gen. in the Cretaceous of Trinidad, B. W. I. Eclogae Geologicae Helvetiae. 50(2): 271-278. gs References:
Leupoldina quinquecamerata compiled by the pforams@mikrotax project team viewed: 11-9-2024
Short stable page link: https://mikrotax.org/pforams/index.php?id=110312 Go to Archive.is to create a permanent copy of this page - citation notes |
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