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Leupoldina pustulans


Classification: pf_mesozoic -> Schackoinidae -> Leupoldina -> Leupoldina pustulans
Sister taxa: L. cabri, L. hexacamerata, L. pustulans, L. quinquecamerata, L. reicheli, L. sp.,

Taxonomy

Citation: Leupoldina pustulans (Bolli, 1957)
Rank: Species
Basionym: Schackoina pustulans pustulans Bolli, 1957
Taxonomic discussion: This species displays a rather wide variability regarding the number of chambers (4 to 6); a more marked morphological variability concerns (a) the shape of the chambers in the last whorl that ranges from subglobular or pyriform in the first chambers to pyriform, digitiform or tubular in the outer ones, (b) the presence/absence of bifurcation in the last chambers, leading to bear one or two ampullae per chamber, and (c) the degree of constriction that separates the ampullae from their respective chambers, abrupt to barely marked. In general, well-separated ampullae are associated with pyriform chambers, whereas in cylindrically shaped chambers constrictions are almost absent. [copied from Chronos database]

Type images:

Original description: Shape of test. - Early stage possibly very slightly trochospiral (usually not recognizable), later becoming planispiral, stellate. Wall. - Calcareous, finely perforate. Chambers. - Early chambers globular to subglobular, becoming more and more elongated ; the four chambers of the last whorl each with a bulb-or bubble- shaped extension (often broken off). Sutures. - Radial, depressed. Aperture. - An interiomarginal, equatorial arch bordered by a lip; in position often slightly asymmetrical to the equatorial plane.

Entries in the Catalog of original descriptions: Schackoina pustulans pustulans

Geological Range:
Last occurrence (top): within G. ferreolensis zone (122.17-122.98Ma, top in Aptian stage). Data source: [copied from Chronos database]
First occurrence (base): within L. cabri zone (123.89-125.71Ma, base in Aptian stage). Data source: [copied from Chronos database]

Plot of occurrence data:

Dec 2017 - Plotting of Neptune data has been re-enabled on the Mesozoic pages following revision of the age-models in Neptune. The data is, however, still very sparse for the Early Cretaceous

  • (NB There is no histogram as there are no occurrence records for the taxon in the Neptune database) Parent: Leupoldina

    Character matrix

    test outline:Stellatechamber arrangement:Pseudoplanispiraledge view:Compressedaperture:Equatorial
    sp chamber shape:Elongatecoiling axis:Very lowperiphery:N/Aaperture border:Thin lip
    umb chbr shape:Elongateumbilicus:Narrowperiph margin shape:Narrowly roundedaccessory apertures:Relict
    spiral sutures:Strongly depressedumb depth:Shallowwall texture:Smoothshell porosity:
    umbilical or test sutures:Strongly depressedfinal-whorl chambers:4.0-4.5 N.B. These characters are used for advanced search. N/A - not applicable

    References:

    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


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    Leupoldina pustulans compiled by the pforams@mikrotax project team viewed: 28-1-2020

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    Short stable page link: http://mikrotax.org/pforams/index.php?id=110311 Go to Archive.is to create a permanent copy of this page - citation notes



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