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Dicarinella concavata


Classification: pf_mesozoic -> Globotruncanidae -> Dicarinella -> Dicarinella concavata
Sister taxa: D. asymetrica, D. bouldinensis, D. canaliculata, D. concavata, D. hagni, D. imbricata, D. longoriai, D. marianosi, D. primitiva, D. roddai, D. takayanagii, D. sp.,

Taxonomy

Citation: Dicarinella concavata (Brotzen, 1934)
Rank: Species
Basionym: Rotalia concavata
Synonyms: Globotruncana araratica; Globotruncana vridhachalensis; Globotruncana concavata cyrenaica

Type images:

Original description: Spiral side depressed and flat plate or bowl-shaped. It has a central disk, and the rim is bordered by an elevated beam. Umbilicus is on umbilical side large and deep. Chambers of the last whorl on the spiral side (six to seven) are similar to those of Rotalia elevata Brotzen, 1934 with only the ridge on the border missing. The umbilical side is like that of R. elevata, and is clearly related with this species.

Entries in the Catalog of original descriptions: Rotalia concavata, Globotruncana araratica, Globotruncana vridhachalensis, Globotruncana concavata cyrenaica

Geological Range:
Last occurrence (top): within D. asymetrica zone (84.19-86.71Ma, top in Santonian stage). Data source: [copied from Chronos database]
First occurrence (base): at base of D. concavata zone (0% up, 89.9Ma, in Turonian stage). Data source: zonal marker (from Timescale Creator)

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

  • Histogram - Neptune occurrence data from DSDP and ODP proceedings. Pale shading <50 samples in time bin. Interpret with caution & read these notes
  • Note to users in China - the diagram may not plot unless you use a VPN since I use google services on the website. If this is a problem please contact me 谢谢.
  • Taxon plotted: Dicarinella concavata, synonyms included - Dicarinella concavata; Dicarinella concavata cyrenaica; Dicarinella cyrenaica; Globotruncana araratica; Globotruncana concavata; Globotruncana concavata concavata; Globotruncana fundiconulosa; Globotruncana vridhachalensis; Marginotruncana concavata;
  • space-time plot :: Samples map :: Parent: Dicarinella

    Character matrix

    test outline:Circularchamber arrangement:Trochospiraledge view:Planoconvexaperture:Umbilical-extraumbilical
    sp chamber shape:Petaloidcoiling axis:Highperiphery:Double keelaperture border:Thick porticus
    umb chbr shape:Globularumbilicus:Wideperiph margin shape:Subangularaccessory apertures:None
    spiral sutures:Raised beadedumb depth:Deepwall texture:Mod. Pustuloseshell porosity:Finely Perforate: 1-2.5µm
    umbilical or test sutures:Strongly depressedfinal-whorl chambers:5.0-7.0 N.B. These characters are used for advanced search. N/A - not applicable

    References:

    Almogi-Labin, A., Reiss, Z & Caron, M. (1986). Senonian globotruncanidae from Israel. Eclogae Geologicae Helvetiae. 79(3): 849-895. gs

    Brotzen, F. (1934). Foraminiferen aus dem Senon Palastinas. Zeitschrift des Deutschen Palastina-Vereins. 28-72. gs

    Huber, B. T., Petrizzo, M. R., Watkins, D. K., Haynes, S. J. & MacLeod, K. G. (2017a). Correlation of Turonian continental margin and deep-sea sequences in the subtropical Indian Ocean sediments by integrated planktonic foraminiferal and calcareous nannofossil biostratigraphy. Newsletters on Stratigraphy. 50: 141-185. gs

    Postuma, J. A. (1971). Manual of planktonic foraminifera. Elsevier for Shell Group, The Hague. 1-406. gs

    Robaszynski, F., Caron, M. & le Groupe de Travail Européen des Foraminifères Planctoniques (1979). Atlas des Foraminiféres Planctoniques du Crétace Moyen (Mer Boréale et Téthys). Cahiers de Micropaléontologie,. 1 & 2: 1-185. gs


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    Dicarinella concavata compiled by the pforams@mikrotax project team viewed: 22-10-2019

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    Short stable page link: http://mikrotax.org/pforams/index.php?id=110087 Go to Archive.is to create a permanent copy of this page - citation notes



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