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Praeglobotruncana kalaati


Classification: pf_mesozoic -> Hedbergellidae -> Praeglobotruncana -> Praeglobotruncana kalaati
Sister taxa: P. algeriana, P. clotensis, P. compressa, P. delrioensis, P. gibba, P. hilalensis, P. inermis, P. kalaati, P. oraviensis, P. pseudoalgeriana, P. shirakinensis, P. stephani, P. sp.,

Taxonomy

Citation: Praeglobotruncana kalaati Gonzales-Donoso & Linares in Robaszynski et al., 1990
Rank: Species
Basionym: Praeglobotruncana (Falsomarginotruncana) kalaati Gonzales-Donoso & Linares in Robaszynski et al., 1990

Type images:

Original description: "Axial outline biconvex to convexo-concave. First chambers of the last whorl are rounded, elliptical or ogival, in lateral view, and final ones are ogival or angulous. One keel in the first chambers of the last whorl or in all of them. Spiral side with 2.5 to 3 whorls. Expansion rate between 2 and 3. Between 4 and 6 chambers in the last whorl, separated by nearly radial to rather inclined, nearly straight to slightly arcuate and depressed to raised sutures. These raised sutures are specially common towards the end of the penultimate whorl and the beginning of the last whorl. Spiral outline nearly always lobate, sometimes very lobate. Umbilical side with sutures deparessed, radial to slightly convex towards the front. Large umbilicus, in general more than one-third of the maximum diameter. Interiomarginal, umbilical-extraubmilical primary aperture. Umbilical system apparently formed by large portici."

Entries in the Catalog of original descriptions: Praeglobotruncana (Falsomarginotruncana) kalaati

Geological Range:
Last occurrence (top): within D. concavata zone (86.71-89.91Ma, top in Coniacian stage). Data source: [copied from Chronos database]
First occurrence (base): within H. helvetica zone (92.56-93.52Ma, base in Turonian 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: Praeglobotruncana

    References:

    Robaszynski, F. et al. (1990). A tentative integrated stratigraphy in the Turonian of central Tunisia: formations, zones and sequential stratigraphy in the Kalaat Senan area. Bulletin des Centres de Recherches Exploration-Production Elf-Aquitaine. 14: 213-384. gs


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    Praeglobotruncana kalaati compiled by the pforams@mikrotax project team viewed: 30-1-2020

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    Short stable page link: http://mikrotax.org/pforams/index.php?id=110433 Go to Archive.is to create a permanent copy of this page - citation notes



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