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Praeglobotruncana compressa


Classification: pf_mesozoic -> Hedbergellidae -> Praeglobotruncana -> Praeglobotruncana compressa
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 compressa Hasegawa 1999
Rank: Species
Basionym: Praeglobotruncana compressa

Type images:

Original description: Diagnosis.- A low trochospral species of Praeglobotruncana with compressed and wedge- shaped chambers in last whorl.

Description.-Test of medium to small size, very low trochospiral, equatorial periphery slightly lobulate; chambers wedge-shaped on dorsal side, triangular and slightly inflated on ventral side, about 10 chanbers in all, enlarging rapidly in size as added, about 4.5 chambers in last whorl, with a peripheral band formed of aligned pustules; final chamber occasionally obliquely shifted toward umbilical direction; chambers in last whorl diagnostically elongated toward spiral direction; sutures on dorsal side gently curved, depressed, ventrally radial or slightly curved and depressed; umbilicus shallow, medium in size, about 1/3-1/4 of maximum diameter of test, umbilical flaps extending into an umbilicus from each chamber; primary aperture bordered by a narrow lip, interiomarginal, umbilical-extraumbilical; wall calcareous, earlier chambers pustulated.

Entries in the Catalog of original descriptions: Praeglobotruncana compressa

Geological Range:
Last occurrence (top): in lower part of H. helvetica zone (30% up, 93.2Ma, in Turonian stage). Data source:
First occurrence (base): in upper part of R. cushmani zone (80% up, 94.4Ma, in Cenomanian stage). Data source:

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:

    Falzoni, F., Petrizzo, M. R., Jenkyns, H. C., Gale, A. S. & Tsikos, H. (2016). Planktonic foraminiferal biostratigraphy and assemblage composition across the Cenomanian–Turonian boundary interval at Clot Chevalier (Vocontian Basin, SE France). Cretaceous Research. 59: 69-97. gs

    Hasegawa, T. (1999). Planktonic foraminifera and biochronology of the Cenomanian-Turonian (Cretaceous) sequence in the Ohyubari area, Hokkaido, Japan. Paleontological Research. 3: 173-192. gs


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    Praeglobotruncana compressa 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=110428 Go to Archive.is to create a permanent copy of this page - citation notes



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