pforams@mikrotax - Dicarinella concavata pforams@mikrotax - Dicarinella concavata

Dicarinella concavata


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

Taxonomy

Citation: Dicarinella concavata (Brotzen, 1934)
Taxonomic rank: species
Basionym: Rotalia concavata
Synonyms:

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

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:-shell porosity:Finely Perforate: 1-2.5µm
umbilical or test sutures:Strongly depressedfinal-whorl chambers:5-7 N.B. These characters are used for advanced search. N/A - not applicable

Geological Range:
Last occurrence (top): within D. asymetrica zone (83.65-85.60Ma, top in Santonian stage). Data source: [copied from Chronos database]
First occurrence (base): at base of D. concavata zone (0% up, 89.8Ma, in Turonian stage). Data source: zonal marker (from Timescale Creator)

Plot of range and occurrence data:

References:

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

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

Huber, B. T., Petrizzo, M. R., Watkins, D. K., Haynes, S. J. & MacLeod, K. G. (2017a). Huber, B. T., Petrizzo, M. R., Watkins, D. K., Haynes, S. J. & MacLeod, K. G. (2017). 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. Newsletters on Stratigraphy. 50: 141-185. gs

Pessagno, E. A. (1967). Pessagno, E. A. (1967). Upper Cretaceous planktonic foraminifera from the western Gulf Coastal Plain. Palaeontographica Americana. 5: 245-445. Palaeontographica Americana. 5: 245-445. gs O

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

Robaszynski, F., Caron, M. & le Groupe de Travail Européen des Foraminifères Planctoniques (1979). 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. Cahiers de Micropaléontologie. 1 & 2: 1-185. gs

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Dicarinella concavata compiled by the pforams@mikrotax project team viewed: 13-5-2025

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Comments (2)

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Dear Sirs,

I did not find Marginotruncana concavata in the search of taxons. And it is here. The references: Marginotruncana concavata accepted as Dicarinella concavata Cat. Ellis & Messina; Chronos Database; Caron 1985 p. 45; Robaszynski et al 1979 (2) p. 71; Premoli Silva & Verga 2004; Petrizzo & Premoli Silva 2011 p. 50

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Hi what has happened here is that since Marginotruncana concavata is a synonym of Dicarinella concavata it does not get a separate page on this database. However, if you search for Marginotruncana concavata using the taxon search box (top right of the page) the search will take you take you to this page. I hope that helps

Jeremy Young