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Hedbergella tardita


Classification: pf_mesozoic -> Hedbergellidae -> Hedbergella -> Hedbergella tardita
Sister taxa: << < 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, H. similis, H. speetonensis, H. tardita, H. tatianae, H. trocoidea, H. tunisiensis, H. tuschepsensis, H. sp.,

Taxonomy

Citation: Hedbergella tardita (Antonova in Antonova et al., 1964)
Rank: Species
Basionym: Globigerina tardita

Type images:

Original description: Test small, tightly coiled, turret-shaped, rounded in outline. Consists of 2-2.5 whorls, in the last of which are 4 round chambers, closely appressed. Chambers of initial whorl very small, later chambers much larger, do not always increase evenly in size and have nearly uniform dimensions, the last chamber is sometimes even smaller than the penultimate one. Sutures not very deep, nearly straight. Aperture umbilical, covered by a thin broad lamina, usually covering the entire umbilical region of the test. Wall smooth, finely perforate, opaque.

Entries in the Catalog of original descriptions: Globigerina tardita

Geological Range:
Last occurrence (top): within Aptian Stage (112.95-126.30Ma, top in Aptian stage). Data source: [copied from Chronos database]
First occurrence (base): within Barremian Stage (126.30-130.77Ma, 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:Quadratechamber arrangement:Trochospiraledge view:Spiroconvexaperture:Umbilical
    sp chamber shape:Globularcoiling axis:Highperiphery:N/Aaperture border:Thin lip
    umb chbr shape:Globularumbilicus:Wideperiph margin shape:Broadly roundedaccessory apertures:None
    spiral sutures:Weakly depressedumb depth:Shallowwall texture:Smoothshell porosity:Finely Perforate: 1-2.5┬Ám
    umbilical or test sutures:Weakly depressedfinal-whorl chambers:4.0-4.0 N.B. These characters are used for advanced search. N/A - not applicable

    References:

    Antonova, Z. A., Shmigina, T. A., Gnedina, A. G. & Kalugina, O. M. (1964). Neokom i apt Mezduretsiya Pshekha-Ubin (Severo-Zapadnii Kavkaz). Voprosy stratigrafii i litologii mezozoiskikh i kainozoiskikh otlozhenii Krasodarskogo Kraya. [Foraminifera of the Neocomian and Aptian of the Psheka-Ubin interfluve (NW Caucasus)]. Trudy Vsesoyuznogo Neftegazovogo Nauchno-issledovatelskogo Instituta, Krasnodarskiy Filial. 12: 3-72. gs


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    Hedbergella tardita compiled by the pforams@mikrotax project team viewed: 9-12-2019

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    Short stable page link: http://mikrotax.org/pforams/index.php?id=110267 Go to Archive.is to create a permanent copy of this page - citation notes



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