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Hedbergella quadricamerata


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

Taxonomy

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

Type images:

Original description: Test small, with a low coil, rounded in outline, with a broadly rounded lobate peripheral margin. Consists of 10-11 chambers, forming 2-2.5 whorls. In the last whorl are 4-5 spherical chambers, freely in contact. Chambers increase in size as added more or less uniformly, but the last one is sometimes a little shorter than the preceding chamber and stretches out upwards. Sutures deep, very slightly curved. Umbilical region open, depressed. Aperture umbilical with a small lip in the form of a narrow curved lamina. Wall finely perforate, smooth, opaque.

Entries in the Catalog of original descriptions: Globigerina quadricamerata

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 Aptian Stage (112.95-126.30Ma, 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: Hedbergella

    Character matrix

    test outline:Subcircularchamber arrangement:Trochospiraledge view:Spiroconvexaperture:Umbilical
    sp chamber shape:Globularcoiling axis:Lowperiphery:N/Aaperture border:Thin lip
    umb chbr shape:Globularumbilicus:Wideperiph margin shape:Broadly roundedaccessory apertures:None
    spiral sutures:Strongly depressedumb depth:Shallowwall texture:Smoothshell porosity:Finely Perforate: 1-2.5µm
    umbilical or test sutures:Strongly depressedfinal-whorl chambers:4.0-5.0 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 quadricamerata compiled by the pforams@mikrotax project team viewed: 20-1-2020

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