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Hedbergella kuhryi


Classification: pf_mesozoic -> Hedbergellidae -> Hedbergella -> Hedbergella kuhryi
Sister taxa: H. aptiana, H. bizonae, H. bollii, H. compacta, H. excelsa, H. gorbachikae, H. handousi, H. hexacamerata, H. hispaniae, H. infracretacea, H. kuhryi, H. kuznetsovae, H. labocaensis, H. luterbacheri, H. maslakovae, H. mitra, H. modesta, H. occulta, H. praelippa, H. praetrocoidea, H. primare, H. quadricamerata, H. roblesae, H. ruka, H. semielongata, H. sigali, > >>

Taxonomy

Citation: Hedbergella kuhryi Longoria 1974
Rank: Species
Basionym: Hedbergella kuhryi
Taxonomic discussion: This species displays a moderate morphological variability regarding the number of chambers (5.5 to 6) in the outer whorl, their elongation degree and consequently the peripheral outline which may be more or less strongly lobate; in addition the spiral side may range from flat to almost pseudoplanispiral. [copied from Chronos database]

Type images:

Original description: Test medium sized; coiled in a low trochospire, formed by about three whorls; peripheral margin stellate; five to six chambers in the last whorl increasing gradually in size as added; first chambers spherical, last two or three chambers elongate, acute and somewhat compressed; spherical to elongate in peripheral view; sutures straight, depressed on both spiral and umbilical sides; primary aperture extraumbilical-spiroumbilical bordered by an imperforate porticus; umbilicus wide and shallow relict flaps often observed umbilically.

Entries in the Catalog of original descriptions: Hedbergella kuhryi


Emended description: Test medium sized, trochospirally coiled, slightly laterally compressed; 5.5 to 6 chambers in the outer whorl, increasing rather fast in size as added; chambers initially globular to subglobular, the last two or three tending to become radially elongate, laterally compressed and pointed at their end; spiral side flat tending to pseudoplanispirality; peripheral outline subcircular, strongly lobate to stellate; sutures straight to slightly curved on both spiral and umbilical sides; umbilicus broad and shallow; aperture as a low extraumbilical arch reaching the periphery. Wall smooth and finely perforate. [copied from Chronos database]

Geological Range:
Last occurrence (top): within G. algerianus zone (118.93-122.17Ma, top in Aptian stage). Data source: [copied from Chronos database]
First occurrence (base): within G. blowi zone (125.71-128.73Ma, base in Barremian 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: Hedbergella

    Character matrix

    test outline:Stellatechamber arrangement:Trochospiraledge view:Compressedaperture:
    sp chamber shape:Elongatecoiling axis:Very lowperiphery:N/Aaperture border:Thin lip
    umb chbr shape:Elongateumbilicus:Wideperiph margin shape:Subangularaccessory apertures:N/A
    spiral sutures:Strongly depressedumb depth:Shallowwall texture:Smoothshell porosity:Finely Perforate: 1-2.5µm
    umbilical or test sutures:Strongly depressedfinal-whorl chambers:5.5-6.0 N.B. These characters are used for advanced search. N/A - not applicable

    References:

    Longoria, J. F. (1974). Stratigraphic, morphologic and taxonomic studies of Aptian planktonic foraminifera. Revista Española de Micropaleontología. Numero Extraordinario: 5-107. gs


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    Hedbergella kuhryi compiled by the pforams@mikrotax project team viewed: 27-2-2020

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    Short stable page link: http://mikrotax.org/pforams/index.php?id=110247 Go to Archive.is to create a permanent copy of this page - citation notes



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